Unit Converters

Convert area between square meters, square feet, acres, hectares, square miles, square kilometers and more — instantly and accurately.

Convert between major world currencies with live, daily-updated exchange rates.

Convert density between kg/m3, g/cm3, g/ml, kg/L, lb/ft3 and lb/in3 quickly and accurately for science and engineering.

Convert Bulgarian leva to euro (and back) at the official irrevocably fixed changeover rate of 1 EUR = 1.95583 BGN, with the legally required rounding.

Convert power between watts, kilowatts, megawatts, horsepower, metric horsepower, BTU per hour and foot-pounds per second.

Convert numbers to Roman numerals and Roman numerals back to numbers (1–3999), in both directions, using the standard subtractive notation rules.

Convert m/s, km/h, mph, knots and feet per second quickly and accurately.

Convert Celsius, Fahrenheit, Kelvin and Rankine instantly with exact formulas.

Convert volume between liters, milliliters, cubic meters, US gallons, quarts, pints, cups, fluid ounces, tablespoons and imperial gallons.

Calculate the acreage of a rectangular, triangular or circular plot from its dimensions, with results in acres, sq ft, sq m and hectares.

Convert angles between degrees, radians, gradians, arcminutes, arcseconds and turns — instantly and precisely.

Convert atmospheres (atm) to pascal, kPa, bar, psi, mmHg, Torr, inHg and millibar — or convert any pressure unit to atm.

Estimate the size of data after Base64 encoding, including the ~33% overhead and optional line-break/data-URI padding.

Convert a decimal number to packed binary-coded decimal and back, encoding each digit as its own 4-bit nibble.

Convert any non-negative integer between binary (base 2), octal (base 8), decimal (base 10) and hexadecimal (base 16) instantly.

Convert digital data sizes between bits, bytes, KB, MB, GB, TB and binary KiB, MiB, GiB, TiB — with the decimal vs binary difference explained.

Convert centimeters to inches, feet, meters, millimeters, yards and miles instantly with a full reference table.

Convert an RGB color (0–255 per channel) to HEX, HSL, HSV and CMYK — with a live color preview swatch.

Convert cooking measurements between teaspoons, tablespoons, fluid ounces, cups, pints, quarts, milliliters and liters.

Convert typing speed between characters per second (CPS), words per minute (WPM), CPM, and keystrokes per hour (KPH).

Calculate cubic feet from length, width and height in feet. Instantly converts to cubic yards, cubic inches, cubic meters, liters and US gallons.

Calculate cubic meters from length, width and height in meters. Converts to liters, cubic feet, cubic inches, cubic centimeters and gallons.

Convert bytes, KB, MB, GB, TB and binary KiB, MiB, GiB units accurately.

Convert data transfer rates between bits per second, kbit/s, Mbit/s, Gbit/s and bytes, KB/s, MB/s, GB/s instantly.

Compute real-world transfer time for a dataset over a link, factoring protocol/overhead efficiency to get effective throughput.

Convert days to seconds, minutes, hours, weeks, months and years — and back. Uses exact hour/minute/second factors and a 365.25-day average year.

Convert decimetres (dm) to and from millimetres, centimetres, metres, kilometres, inches, feet, yards, and miles.

Estimate how long a file takes to download from its size and your connection speed, with a clean hh:mm:ss result.

Swap the byte order of a 16/32/64-bit hex value to convert between big-endian and little-endian.

Convert energy between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, foot-pounds and electronvolts.

Convert Fahrenheit to Celsius, Kelvin and Rankine instantly with exact formulas and a visual temperature scale.

Convert feet to meters, inches, centimeters, millimeters, yards, miles, kilometers, and nautical miles instantly with exact values.

Convert force between newtons, kilonewtons, dynes, pound-force, kilogram-force and ounce-force quickly and accurately.

Convert frequency between hertz, kilohertz, megahertz, gigahertz, terahertz and revolutions per minute (rpm) instantly.

Convert fuel economy between L/100km, kilometers per liter, US miles per gallon and UK miles per gallon accurately.

Convert US liquid, US dry or Imperial gallons to litres, millilitres, quarts, pints, cups, fluid ounces and cubic units.

Convert any English word or phrase to a gematria number value using Simple (A=1–Z=26), Reverse, or Reduced systems.

Convert between standard binary and reflected Gray code, where adjacent values differ by exactly one bit.

Calculate the isopsephy (Greek gematria) value of any Greek word or phrase. Each letter maps to its Milesian numeral: Α=1, Ι=10, Ρ=100, Ω=800 and so on.

Convert height between centimetres and feet & inches. Switch direction to go cm → ft/in or ft/in → cm, with the value in metres. Free, instant and accurate.

Convert a hex color code (#RGB or #RRGGBB) into red, green and blue channel values and a CSS rgb() string.

Convert hours to minutes, seconds, milliseconds, days, weeks, months and years instantly. Supports decimal hours (e.g. 1.5 h).

Break a decimal number into IEEE-754 sign, exponent, and mantissa bits for 32-bit (single) and 64-bit (double) precision.

Convert between imperial (inches, feet, pounds, gallons, °F) and metric units instantly — all four measurement types in one tool.

Convert inches to millimetres, centimetres, metres, feet, yards and miles instantly using exact SI definitions.

Convert kilometres to miles, metres, feet, yards, inches, nautical miles and light-years — or convert any distance to kilometres.

Convert kilopascals (kPa) to pascals, MPa, bar, atm, psi, mmHg, Torr, inHg and mbar — or convert any pressure unit to kPa.

Convert land area between acres, hectares, square meters, square feet, sq km, sq miles, rai, cents and marla instantly.

Convert normal text into leet speak (1337) by substituting letters with numbers and symbols — basic or advanced mode.

Convert between meters, kilometers, miles, feet, inches, yards and more — instantly and accurately.

Convert between litres, cubic centimetres (cc), millilitres and US gallons — plus fl oz and cups in one step.

Convert Mbps to MB/s, KB/s and Gbps, and calculate how long it takes to download or upload any file at your speed.

Convert mils (thousandths of an inch) to micrometers, millimeters, centimeters, meters and inches instantly.

Convert miles to kilometers, meters, feet, yards, nautical miles and centimeters instantly with exact international conversion factors.

Convert millimeters to inches, centimeters, meters, micrometers, feet, yards and miles instantly with exact conversion factors.

Convert inches, feet, yards, centimeters, meters, kilometers or micrometers to millimeters instantly with exact conversion factors.

Convert megapascals (MPa) to psi, bar, kPa, atm, GPa, Torr, mmHg and more — or convert any pressure unit to MPa.

Convert torque between Newton-meters, foot-pounds, inch-pounds, kgf·m and Newton-centimeters instantly.

Convert nanometres to micrometres, millimetres, metres, angstroms and picometres — or convert any of those back to nm.

Convert any whole number between binary, octal, decimal and hexadecimal. Enter a value, pick its base, and see all four representations instantly.

Calculate how many sheets of paper and reams to buy for a print job — supports duplex printing and multiple paper sizes.

Convert pounds and ounces to kilograms, grams, stones and total ounces. Enter lb + oz together for a combined weight.

Convert parts per million (ppm) to ppb, ppt, percent, per mille, mg/kg, mg/L and μg/L — and back from any of those units.

Convert pressure between pascals, kilopascals, megapascals, bar, psi, atmospheres, mmHg and torr — fast and accurate.

Convert PSI (pounds per square inch) to bar, kPa, MPa, Pa, atm, mmHg, inHg, Torr and psf — or convert any pressure unit back to psi.

Turn red, green and blue values (0-255) into a #RRGGBB hex code plus a ready-to-use CSS rgb() string.

Convert RGB color channels into HSL (hue degrees, saturation and lightness percent) for easier color tweaking.

Convert time between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, months and years instantly.

Convert torque between newton-meters, kilonewton-meters, pound-feet, pound-inches and kilogram-force-meters accurately.

Convert any text to Unicode code points (U+XXXX hex, decimal or binary) and see the UTF-8 byte count, character count and script distribution.

Convert a Unix timestamp (seconds since 1970-01-01 UTC) to a human-readable UTC date and time, and see days, weeks, and years elapsed.

Estimate a video file's size from its bitrate and duration (with optional audio track), or solve for bitrate.

Check the contrast ratio between two hex colors and whether it passes WCAG AA/AAA for normal and large text.

Convert kilograms, grams, pounds, ounces, stones and tonnes quickly and accurately.

Convert any distance to obscure and unusual units: smoots, cubits, furlongs, hands, fathoms, chains, leagues and light years.

Convert yards to metres, centimetres, feet, inches, miles, furlongs and more using exact 1959 SI definitions.

Convert acres to hectares (and to square meters, square feet, square miles) instantly using the exact international conversion factor.

Convert acres to square feet (and square yards, square inches, square meters) instantly. 1 acre = 43,560 sq ft exactly.

Convert angstroms (Å) to nanometres, picometres, micrometres and metres — 1 Å = 0.1 nm exactly.

Convert ares to cents (South Indian land unit) and to square metres, square feet, acres, and hectares. 1 are ≈ 2.4711 cents.

Convert ares to hectares instantly. 1 are = 0.01 ha (exact). Also shows square meters, square feet and acres.

Convert between astronomical units (AU) and kilometres, miles, metres, light-years, parsecs and light-minutes.

Convert standard atmospheres (atm) to pascals, kilopascals, bar, PSI, and mmHg instantly — exact BIPM definition.

Convert bar to standard atmospheres (atm) — plus kPa, Pa, psi, mmHg and mbar. 1 bar = 0.986923 atm.

Convert bar to psi (pounds per square inch) — plus atm, kPa, mmHg and mbar. 1 bar = 14.5038 psi.

Convert bar (absolute) to psig (gauge pressure in psi). 1 bar ≈ −0.192 psig because 1 bar < 1 atm.

Convert barometric pressure between hPa, mbar, inHg, mmHg, Pa, kPa, atm and psi — with sea-level weather context.

Convert any number of billions to trillions, millions and quadrillions instantly — with the scale relationship shown step by step.

Convert any binary number to hexadecimal instantly — with the nibble grouping that makes the 1-to-4 mapping visible.

Convert a binary number to octal instantly — groups bits into triplets showing the 3-to-1 relationship.

Convert capacitance between farads, millifarads, microfarads, nanofarads, picofarads and femtofarads instantly.

Convert cubic centimetres (cc) to grams using density. Choose a preset substance or enter a custom density.

Convert cubic centimetres (cc) to litres and back, plus mL, US gallons and fluid ounces — all exact SI definitions.

Convert cc (cubic centimetres) to mL — they are identical — plus litres, fluid ounces, teaspoons, tablespoons and cups.

Convert cc (cubic centimetres / mL) to US or UK fluid ounces and back — plus litres, cups, pints, quarts and gallons.

Convert CCF (hundred cubic feet) to US gallons, litres and cubic metres — used for water and natural gas billing.

Convert CCF (hundred cubic feet) of natural gas to therms and MMBtu using your gas's BTU content. For gas billing and energy use.

Convert Celsius to Fahrenheit, Kelvin and Rankine instantly with exact formulas and a visual temperature scale.

Convert any Celsius temperature to Fahrenheit instantly. Includes Kelvin and a plotted conversion line so you can see the linear relationship.

Convert cents to square metres, square feet, acres and hectares. 1 cent = 40.4686 m² — the standard land unit used in South India and Sri Lanka.

Convert centigrade to Celsius and learn why they are identical scales. Also converts to Fahrenheit, Kelvin and Rankine.

Convert US cents to dollars instantly. Shows the decimal dollar amount, whole dollars and remaining cents.

Convert euro cents (the minor unit) to euros. Shows the decimal euro amount, whole euros and remaining cents.

Convert between CGS (centimetre-gram-second) and SI (metre-kilogram-second) units for length, mass, force, energy, pressure and more.

Convert any height in centimetres to feet and inches. See feet, remaining inches, total inches and metres instantly.

Convert centimetres to feet and inches, or feet and inches back to centimetres. Instant bidirectional cm ↔ ft + in converter.

Convert centimeters to decimal inches, fractional inches (nearest 1/16") and feet + inches instantly.

Convert centimeters to kilometers instantly. Also shows meters, miles, feet and nautical miles.

Convert centimeters to meters instantly. Also shows mm, km, inches and feet for a full reference.

Convert centimeters to millimeters instantly. Exact metric conversion: 1 cm = 10 mm, with a full reference.

Convert any value between two units using a custom conversion factor. Enter the factor yourself for any unit pair not covered by a dedicated converter.

Convert 2D coordinates between Cartesian (x, y) and polar (r, θ) form — both directions, with degrees and radians.

Convert crore to lakh instantly. Also shows millions, billions and thousands. 1 crore = 100 lakh.

Convert crore to million instantly. Also shows lakh, billion and trillion. 1 crore = 10 million.

Convert cubic feet to cubic meters instantly. Also converts to liters, US gallons, cubic inches, cubic yards and cubic centimetres.

Convert cubic feet to US gallons, UK gallons, liters, quarts and pints instantly using the exact 1 ft³ = 7.48052 gal factor.

Convert cubic feet to pounds (and kg, tons) for water, concrete, sand, soil, steel and more — choose a material or enter a custom density.

Convert cubic inches to US gallons, UK gallons, liters, quarts and fluid ounces using the exact 231 in³ = 1 US gal definition.

Convert cubic meters to metric tons, short tons and pounds for water, concrete, sand, steel and more — choose a material or enter a custom density.

Convert cubic yards to US short tons (and metric tons) for concrete, gravel, sand, topsoil, crushed stone and more using bulk density values.

Convert US cups to fluid ounces instantly. Also shows tablespoons, teaspoons, pints, quarts, millilitres and litres.

Convert US cups to gallons, quarts, pints, fluid ounces, milliliters and liters. 16 US cups = 1 US gallon exactly.

Convert US cups to pints. Also shows quarts, gallons, fluid ounces, millilitres and litres.

Convert US cups to quarts. Also shows pints, gallons, fluid ounces, millilitres and litres.

Convert dBm to watts, milliwatts and microwatts instantly. Used in RF, wireless, audio and optical power measurement.

Convert decagrams to grams and other weight units — kg, mg, oz, lb — using the exact SI factor 1 dag = 10 g.

Convert any non-negative integer from decimal (base 10) to hexadecimal (base 16) with binary and octal for context.

Convert any non-negative decimal integer to octal (base 8), with binary triplet grouping and hex for context.

Convert decimetres to metres and seven other units — cm, mm, km, inches, feet, yards — using the exact SI factor 1 dm = 0.1 m.

Convert between decimal degrees and degrees–minutes–seconds (DMS) notation, plus radians and gradians. Ideal for GPS coordinates, surveying and navigation.

Convert an angle in degrees, arc minutes and arc seconds (DMS) to total arc seconds, decimal degrees and radians.

Convert decimal degrees to arcminutes and arcseconds. Also outputs radians, gradians and full DMS notation. Useful for GPS, astronomy and navigation.

Chain up to three conversion factors to convert any unit step-by-step using the factor-label method.

Convert any number of dimes, quarters, nickels, pennies and half dollars to dollars — instant coin jar total.

Convert between common distance units — mm, cm, m, km, inches, feet, yards, miles, nautical miles, light-years and AU.

Convert drops (gtt) to millilitres for standard, IV macrodrip, IV microdrip or essential-oil drop sizes. Also shows litres, teaspoons and tablespoons.

Convert between energy units: Joules, kJ, MJ, kWh, Wh, calories, kcal, BTU, foot-pounds and ergs instantly.

Convert Fahrenheit to Celsius instantly — also shows Kelvin and Rankine equivalents with the exact formula.

Convert a length in feet and inches to centimetres, metres, millimetres, yards and total inches. Handles any combination of feet and inches.

Convert feet to inches instantly — 1 foot = 12 inches exactly. Also shows the result in centimetres and metres.

Convert feet to metres, centimetres, millimetres, inches, yards and kilometres instantly. 1 ft = 0.3048 m exactly.

Convert feet to miles, kilometres, metres, yards and nautical miles. 1 statute mile = 5,280 feet exactly.

Convert feet to yards, metres, centimetres and inches. 1 yard = 3 feet exactly. Shows whole yards plus any remaining feet.

Convert US fluid ounces to pounds, ounces, grams, and kg for water, milk, oil, honey, and other substances by density.

Convert feet and inches to centimetres instantly. 1 ft = 30.48 cm exactly. Also shows metres, millimetres and total inches.

Convert force between Newton, pound-force, kilogram-force, kilonewton, kip, dyne, poundal and millinewton instantly.

Convert gaj to square yards, square feet, square metres, marla, biswa, acres and hectares. 1 gaj = 1 square yard.

Convert US liquid or Imperial gallons to cubic feet, cubic inches, cubic metres, litres and millilitres instantly.

Convert US or Imperial gallons to cups, pints, quarts, fluid ounces, tablespoons and teaspoons instantly.

Convert US or Imperial gallons to grams, kilograms, ounces and pounds using density. Choose water, fuel, oil, honey and more.

Convert US or imperial gallons to kilograms for water, gasoline, diesel, milk, ethanol, oil, honey and more.

Convert US or Imperial gallons to pints, quarts, cups, fluid ounces and litres with exact ratio-based conversions.

Convert US gallons to pounds and kilograms for water, gasoline, diesel, milk, oil, honey and more — or enter a custom density.

Convert gallons to quarts, pints, cups and fluid ounces — for both US liquid and UK Imperial gallons — plus litres and millilitres.

Convert US or imperial gallons to metric tons, US short tons and UK long tons for water, fuel, oil and other common liquids.

Convert grams to liters for water, milk, oil, honey and other liquids using each substance's density.

Convert grams of protein, carbohydrates, fat and alcohol to kilocalories using the Atwater energy factors.

Convert grams to US fluid ounces for water, milk, flour, honey and more — density applied automatically per ingredient.

Convert grams to milliliters for water, ethanol, oil, glycerol, mercury and more — using each substance's density.

Convert grams to millilitres for water, flour, sugar, butter, oil, honey and more using each ingredient's density.

Convert grams to avoirdupois ounces, troy ounces, pounds and kilograms instantly with a reference weight scale.

Convert grams to pounds (and ounces), or between any combination of grams, kilograms, ounces and pounds instantly.

Convert grams to US teaspoons for water, flour, sugar, salt, baking soda, honey and more using each ingredient's density.

Convert between Rockwell C, Vickers and Brinell hardness scales for steel using ASTM E140 interpolated lookup tables.

Convert hectares to acres (and to square meters, square feet, square miles, square yards) using the exact international conversion factor: 1 ha = 2.47105381 acres.

Convert height from feet and inches or centimetres to total inches. Instantly see the equivalent in cm and metres.

Convert hours to days instantly. See full days, remaining hours, weeks, months and years — decimal input supported.

Convert hours to seconds, minutes, milliseconds and microseconds instantly. 1 hour = 3 600 seconds — decimal input supported.

Convert hours to weeks with the exact full-weeks and remainder breakdown. 168 hours = 1 week. Decimal input supported.

Convert hours to years, months, weeks and days. Uses the Gregorian average of 365.25 days per year (8 766 hours). Decimal input supported.

Convert imperial units to metric: length (in/ft/mi), weight (lb/oz), volume (US gal/fl oz), temperature (°F), area, and speed.

Convert inches to metres, centimetres, millimetres, feet and yards instantly using the exact 1 in = 0.0254 m definition.

Convert torque from inch-pounds (in·lb) to foot-pounds (ft·lb) and Newton-metres instantly. 12 in·lb = 1 ft·lb, exact.

Convert torque from inch-pounds (in·lbf) to newton-metres (N·m). Also shows foot-pounds, kgf·cm and centinewton-metres.

Convert inches to centimetres instantly. 1 inch = 2.54 cm exactly. Also shows millimetres, metres and feet-and-inches.

Convert decimal inches to the nearest fractional inch (halves, quarters, eighths, sixteenths, thirty-seconds, sixty-fourths) with the exact rounding error.

Convert inches to yards, feet and metres instantly. Exact: 1 yard = 36 inches. Shows whole yards plus remainder.

Convert energy in joules to voltage in volts using the formula V = E / Q (voltage = energy ÷ charge). Also supports conversion via current and time.

Convert katha to square feet, square meters, square yards, acres and hectares. Supports regional values for West Bengal, Bihar, Assam and more.

Convert any Kelvin temperature to Celsius, Fahrenheit, and Rankine instantly with exact formulas and a live conversion chart.

Convert any Kelvin temperature to Celsius in one step. Includes a Fahrenheit bonus and a K → °C conversion chart.

Convert any Kelvin temperature to Fahrenheit using the exact two-step formula. Includes Celsius and a K → °F conversion chart.

Convert kilograms to US or UK gallons for water, milk, gasoline, oil and other liquids by selecting the substance density.

Convert kilograms to pounds (and back) with instant results in lbs, oz, stone, grams and tonnes.

Convert kilograms to litres (and back) for water, milk, gasoline, oil and more by density. Also shows mL, gallons and cubic metres.

Convert kilograms to millilitres (and back) for water, milk, oil and other liquids. Also gives litres, fluid ounces, teaspoons and cups.

Convert kilograms to ounces (avoirdupois) or ounces to kilograms instantly, with grams and pounds too.

Convert kilograms to stones and pounds or stones/pounds to kilograms. Also shows total pounds.

Convert kilogram-force per square centimetre (kgf/cm²) to psi, bar, kPa, MPa, atm, Pa and mmHg instantly.

Convert kilobytes to megabytes and back — binary (IEC, ÷1024) or decimal (SI, ÷1000) — plus GB and TB.

Convert kilometres to metres and back. Also shows centimetres, millimetres, miles, feet and yards.

Convert kilometres to feet, inches, yards and miles. Uses the exact international foot (0.3048 m). 1 km = 3,280.84 feet.

Convert kilometres to miles instantly. Uses the exact international definition: 1 mile = 1.609344 km. Also shows metres, feet and nautical miles.

Convert knots to km/h, mph, m/s and ft/s. Exact conversion: 1 knot = 1.852 km/h. Also shows the Beaufort wind scale classification.

Convert knots (nautical miles per hour) to mph, km/h and m/s instantly. 1 knot = 1.150779 mph.

Convert kilopascals (kPa) to standard atmospheres (atm) — plus Pa, bar, psi and mmHg. 1 kPa = 0.009869 atm.

Convert kilopascals (kPa) to millimetres of mercury (mmHg) — plus Torr, atm, bar and psi. 1 kPa = 7.5006 mmHg.

Convert kilopascals (kPa) to psi (pounds per square inch) — plus atm, bar and mmHg. 1 kPa = 0.14504 psi.

Convert ksi (kilopounds per square inch) to MPa (megapascals) instantly. Also shows GPa, kPa, bar and psi equivalents.

Convert ksi (kilopounds per square inch) to psi instantly. 1 ksi = 1000 psi exactly. Also shows MPa, kPa and bar.

Convert latitude and longitude (decimal degrees, WGS84) to UTM easting, northing, zone and band using the Transverse Mercator projection formula.

Convert pounds to kilograms instantly. Shows kg, g, oz, stones and tonnes — based on the exact 1 lb = 0.45359237 kg definition.

Convert a mass in pounds to gravitational force in newtons. Choose Earth, Moon or Mars gravity. Shows kN, kgf and dyne.

Convert common pounds (avoirdupois) to troy pounds and metric pounds. Shows troy ounces, grams and grains — different pound standards explained.

Calculate PSI from a force in pounds over a contact area in square inches. Also converts to kPa, bar, atm and MPa. Ideal for hydraulics and contact pressure.

Convert pounds to stones and pounds remainder. Also shows kilograms, ounces and decimal stones. Used for body weight in the UK and Ireland.

Convert light-years to kilometres, miles, astronomical units (AU), and parsecs — or convert any of those back to light-years.

Convert litres to centilitres instantly — plus millilitres, US fluid ounces, cups and tablespoons. 1 L = 100 cL.

Convert litres to pounds (and kg, g, oz) for water, milk, fuel, oil and more — using each liquid's actual density.

Convert litres to US liquid gallons, UK (imperial) gallons and US dry gallons. Also shows quarts, pints, fl oz and millilitres.

Convert a real-estate lot size from square feet, square meters, square yards, hectares or square miles to acres instantly.

Convert a real-estate lot size from acres, square meters, square yards, hectares or square miles to square feet.

Instantly convert text to UPPERCASE, lowercase, Title Case, Sentence case, or alternating case with a character and word count.

Convert m/s to km/h instantly. 1 m/s = 3.6 km/h exactly. Also shows mph, knots and feet per second.

Convert megabytes (MB) to gigabytes (GB) in both decimal (SI) and binary (IEC GiB) standards, plus KB, TB, KiB, MiB, TiB and bits.

Convert network speed from Mbps to Gbps (÷1 000) and to MB/s, GB/s, Kbps, bps — with a step-by-step breakdown of all conversions.

Convert between micrograms (mcg/µg) and milligrams (mg) instantly. 1 mg = 1 000 mcg. Works in both directions.

Calculate how many mL to draw from a solution to deliver a dose in micrograms (mcg) — given drug amount and total volume.

Convert between metric and imperial units for length, mass, area, volume, speed and temperature. Instant, precise output.

Convert US Standard mesh numbers to microns (µm), mm and inches using ASTM E11 sieve data, or convert particle sizes back to the nearest mesh.

Convert meters to feet, miles, kilometers, inches, yards and nautical miles — or from any unit back to meters.

Convert meters to miles instantly. Also shows kilometers, feet, yards and nautical miles. 1 mile = 1609.344 m exactly.

Convert meters to feet and inches instantly. Also shows yards, miles, cm and mm. 1 meter = 3.28084 feet exactly.

Convert metres to feet, feet and inches, yards, centimetres and millimetres instantly with exact conversion factors.

Convert between all metric units for length (mm→km), mass (mg→t) and volume (mL→kL) using SI prefix factors.

Convert metric units (cm, kg, mL, °C) to imperial units (inches, pounds, fl oz, °F) — length, weight, volume and temperature in one tool.

Convert metric lengths (mm, cm, m, km) to inches and feet. 1 inch = 25.4 mm exactly. Also shows yards and miles.

Convert metric wrench and socket sizes (mm) to the nearest SAE (fractional inch) equivalent. Shows deviation and adjacent SAE sizes.

Convert metric units (km, kg, L, °C, km/h) to US standard / imperial units — miles, pounds, gallons, Fahrenheit, and mph.

Convert milligrams to cubic centimetres (cc) using substance density. Choose a preset or enter a custom density.

Convert milligrams to pounds (lb), ounces, grams, and kilograms using exact avoirdupois conversion factors.

Convert milligrams to millilitres using substance density. Includes presets for water, saline, ethanol, milk, oil, honey, and blood.

Convert milligrams to US tablespoons using substance density. Includes presets for water, oil, honey, milk, maple syrup, and butter.

Convert milligrams to teaspoons for water, sugar, salt, flour, honey and more — instantly, based on substance density.

Convert micrometres (µm) to nanometres, millimetres, centimetres, metres, inches, feet, mils and angstroms — all conversions exact.

Convert microns (µm) to mils (thou) and back — 1 mil = 25.4 µm exactly. Enter either unit for the full conversion.

Convert mils (thousandths of an inch) to decimal inches, fractional inches, feet, mm and µm. Exact: 1 mil = 0.001 inch.

Convert mils (thousandths of an inch) to millimeters and micrometers. Exact: 1 mil = 0.0254 mm = 25.4 µm.

Convert any number of millions to billions, trillions, and the full raw figure instantly.

Convert millions to lakhs instantly. 1 million = 10 lakh. Also shows crores, thousands and the full numeric value.

Convert millions to thousands instantly. 1 million = 1,000 thousand. Also shows billions, lakhs and the full numeric value.

Convert milliseconds to seconds, minutes, hours, days, microseconds, and nanoseconds instantly.

Convert milliseconds (ms) to seconds, minutes, hours, microseconds and nanoseconds. 1 ms = 0.001 s exactly.

Convert minutes to seconds, milliseconds, hours, days, weeks, months and years instantly. Supports decimal minutes.

Convert any number of minutes to days — showing decimal days plus the exact whole-days, remaining hours and remaining minutes breakdown.

Convert hours and minutes (HH:MM) to decimal hours for timesheets, payroll or scheduling. Example: 1 h 30 min = 1.5 h.

Instantly convert minutes to seconds, hours, days and milliseconds — any decimal value supported.

Convert minutes to years, months, weeks, days, hours and seconds with a detailed mixed-unit breakdown.

Convert millilitres (mL) to cubic centimetres (cc or cm³) instantly — 1 mL = 1 cc by definition. Also shows litres, cubic inches and US/UK fluid ounces.

Convert millilitres to cups (US customary, US legal, metric or imperial) and get the nearest kitchen fraction like ¾ cup. Reverse conversion included.

Convert millilitres to kilograms using density. Choose water, milk, oil, honey, alcohol or enter a custom density.

Convert millilitres to pounds using density. Choose water, milk, oil, honey, alcohol or enter a custom density.

Convert millilitres to US or UK fluid ounces, or to weight ounces using substance density. Includes tablespoons, cups and pounds.

Convert millilitres to tablespoons (US, metric, Australian or UK) and vice-versa. Includes cross-reference for all four tablespoon standards.

Convert millilitres to teaspoons and tablespoons for US, Metric/Australian or UK measurements. 1 US tsp = 4.929 mL, 1 metric tsp = 5 mL.

Convert millilitres to microlitres (µL), nanolitres, picolitres, litres and US fluid ounces. 1 mL = 1,000 µL exactly.

Convert millimeters to feet (decimal and feet-and-inches). Also shows equivalent inches, centimeters and meters.

Convert millimeters to decimal inches and the nearest 1/16-inch fraction. Also shows feet, centimeters and meters.

Convert millimeters to kilometers and other units — meters, centimeters, miles and feet — using exact SI-defined factors.

Convert millimeters to meters — plus centimeters, kilometers, inches and feet — using exact SI definitions.

Convert millimeters of mercury (mmHg) to standard atmospheres (atm) and other pressure units — Pa, kPa, bar and psi.

Convert mmHg (millimetres of mercury) to atm, Pa, kPa, bar, psi, inHg, Torr and mbar — or convert any pressure unit to mmHg.

Convert any number of months to years (and remaining months), plus total weeks, days and hours using average Gregorian calendar lengths.

Convert megapascals (MPa) to psi instantly. 1 MPa = 145.0377 psi. Also shows bar, kPa, atm and Pa.

Convert MPa (absolute) to psig (gauge pressure in psi). 1 MPa abs ≈ 130.34 psig at standard atmosphere.

Convert torque between Newton-meters and foot-pounds in both directions. Essential for automotive, fastener, and engineering work.

Convert torque between Newton-meters and inch-pounds in both directions. Used for small fasteners, electronics, and bicycle components.

Convert natural gas volume (cubic feet or cubic metres) to BTU, kWh, therms, MJ, GJ, and MMBtu using the standard higher heating value.

Convert newtons and metres to joules: calculate work/energy (W = F × d) and convert the result to kJ, calories, kcal, watt-hours, and foot-pounds.

Convert any number of nickels to dollars and cents instantly. Also shows equivalent pennies, dimes and quarters.

Convert nanometres to metres (and metres to nanometres) instantly. Shows µm, mm, cm, and Å equivalents with a visible-light context scale.

Convert any number to billions, millions, trillions and thousands instantly — with scientific notation and a full step-by-step breakdown.

Convert any number to millions, billions, trillions and thousands instantly — just divide by 1,000,000.

Convert ounces to kilograms instantly. Supports both avoirdupois oz (everyday weight) and troy oz (precious metals). Also shows grams, pounds and stones.

Convert US fluid ounces to cups, tablespoons, teaspoons, pints, quarts and millilitres instantly.

Convert ounces (avoirdupois) to grams, kilograms, milligrams and pounds with exact conversion factors.

Convert ounces to pounds, kilograms, grams and stones using exact avoirdupois conversion factors.

Convert fluid ounces to cubic centimetres (cc) for medical, lab, and cooking use — cc equals mL exactly.

Convert fluid ounces to millilitres (or mL to fl oz) for US and UK imperial measurements instantly.

Convert pressure between Pascals, PSI, kPa, MPa, bar, and atmospheres instantly.

Convert pascals (Pa) to kPa, MPa, bar, atm, psi, Torr, mmHg, inHg, hPa and more — or convert any pressure unit to pascals instantly.

Convert any number of US pennies (cents) to dollars instantly. Shows whole dollars, remaining cents, and the decimal dollar amount.

Convert US or Imperial pints to pounds (lb) for water, milk, oil, honey and more — using each liquid's density.

Convert pints to cups instantly — US or Imperial. 1 pint = 2 cups in both systems; also shows fluid ounces, tablespoons, teaspoons, quarts and gallons.

Convert pints to gallons — US or Imperial. 8 pints = 1 gallon in both systems; also converts to quarts, cups, fluid ounces and litres.

Convert pixels to inches, centimetres and millimetres using a resolution (DPI). Works for screens, print and graphic design.

Convert pounds to grams, kilograms, ounces, milligrams and stones. Uses the exact avoirdupois definition: 1 lb = 453.59237 g.

Convert pounds to grams instantly using the exact factor 1 lb = 453.59237 g. Also converts to kg, mg, oz and stones.

Convert kilograms, grams, ounces, stones or metric tons to pounds (lbs). Explains that "lb" and "lbs" are both abbreviations for pounds.

Convert pounds to ounces instantly. Also shows grams, kilograms and stones. Uses the exact 1 lb = 16 oz (avoirdupois) definition.

Convert pounds to stones and pounds. Shows whole stones, remaining pounds and ounces, kilograms and total ounces. 1 stone = 14 lb.

Convert power between watts, kilowatts, megawatts, mechanical and metric horsepower, BTU/h, ft-lbf/s, cal/s and kcal/h. All results at once.

Convert parts per million (ppm) to mg/L, μg/L, ng/L, and g/L with optional density correction for non-water solutions.

Convert pressure between Pa, kPa, MPa, hPa, bar, psi, atm, mmHg, Torr and inHg — with all equivalent values shown at once.

Convert psi (pounds per square inch) to atm (standard atmospheres) — plus bar, kPa and mmHg. 1 atm = 14.6959 psi.

Calculate water flow rate (GPM) from pressure (PSI) and orifice diameter using the standard discharge formula Q = 29.84 × Cd × d² × √P.

Convert psi (pounds per square inch) to inches of water column (inH₂O) — plus mmH₂O, Pa and inHg. 1 psi = 27.6807 inH₂O.

Convert PSIG (gauge pressure) to PSIA (absolute pressure) by adding atmospheric pressure. Adjusts for altitude using the ISA model.

Convert pixel values to em, rem, pt, and % CSS units instantly. Set a custom parent or root font size for accurate results in any component.

Convert between counting units: units, pairs, dozens, baker's dozens, scores, gross and great gross — all equivalents shown at once.

Convert any number of US quarters (25¢ coins) to dollars and cents. Shows whole dollars, leftover cents, and equivalent dimes and nickels.

Convert US quarts to cups instantly — plus pints, fluid ounces, milliliters and liters. 1 quart = 4 cups.

Convert US quarts to gallons in one step — plus pints, fluid ounces and liters. 4 quarts = 1 gallon.

Convert US quarts to pounds for water, milk, oil, honey, flour, sugar and more. Volume × density = mass.

Convert radioactivity between becquerel, curie, millicurie, microcurie, nanocurie, picocurie and rutherford — instant, accurate unit conversion.

Convert RMS voltage and RMS current to real power in watts (W), apparent power (VA) and reactive power (VAR) for AC circuits.

Convert between real-world dimensions and scaled model or drawing dimensions for any 1:X scale ratio.

Convert any number of seconds to minutes, hours, days, weeks, months, years, milliseconds and microseconds instantly.

Convert seconds to days instantly — see whole days plus the remaining hours, minutes and seconds, with hours, minutes and weeks also shown.

Convert seconds to hours instantly — get the exact decimal result plus the H:M:S breakdown.

Convert seconds to minutes instantly — get the exact decimal minutes and the M:S breakdown.

Convert any number of seconds to years — with a full Y:D:H:M:S breakdown and total days, hours, and minutes.

Convert square centimetres to square millimetres instantly. 1 cm² = 100 mm² because area scales as the square of the linear factor (1 cm = 10 mm).

Convert square feet to square metres, square inches, yards, acres, hectares, km², and square miles.

Convert square feet to acres (and hectares, m², sq yards, sq miles) instantly. 1 acre = 43,560 sq ft.

Convert square inches to square feet instantly. Also shows the equivalent in square centimetres, square metres, and square yards.

Convert square metres to square feet, square inches, square yards, square centimetres, hectares, acres, square kilometres and square miles instantly.

Convert square metres to square feet (or feet to metres) instantly. Bidirectional — fill either box. Also shows square yards and square inches.

Convert square miles to square kilometres (or km² to mi²) instantly. Bidirectional. Also shows hectares, acres and square metres.

Convert square yards to square meters, square feet, acres, hectares and back — with an instant full conversion table.

Convert stones and pounds to kilograms. Uses the exact definition: 1 stone = 14 lb = 6.35029318 kg.

Convert stones and pounds to total pounds, kilograms and ounces. 1 stone = 14 lbs exactly — no rounding.

Convert US tablespoons to grams for flour, sugar, butter, honey, salt and 20 other common ingredients using ingredient-specific densities.

Convert tablespoons to millilitres for US (14.79 mL), metric (15 mL), UK (17.76 mL) and Australian (20 mL) tablespoon standards.

Convert teaspoons to grams for sugar, salt, flour, butter, honey and 14 other common cooking and baking ingredients.

Convert any time duration between nanoseconds, milliseconds, seconds, minutes, hours, days, weeks, months and years instantly.

Convert engine torque and RPM to horsepower, kilowatts and metric PS — enter Nm or lb-ft plus engine speed.

Convert Torr to atmospheres (atm) and vice versa — plus Pa, kPa, bar and psi. 1 atm = 760 Torr exactly.

Convert teaspoons to millilitres for US, Metric/Australian or UK measurements. 1 US tsp = 4.929 mL, 1 metric tsp = 5 mL, 1 UK tsp ≈ 5.919 mL.

Convert any text from uppercase (or mixed case) to all lowercase instantly, with a character-type breakdown.

Convert volume between 20 metric and US/imperial units — liters, gallons, cups, fluid ounces, cubic feet and more.

Convert weeks to months, days and years using the average Gregorian month — shows whole months plus the remaining fractional part.

Convert weeks to years, months, days, hours and minutes. Uses the Gregorian average of 52.1775 weeks per year.

Convert yards to meters, centimeters, millimeters, kilometers, feet and inches instantly using the exact 1959 international yard definition.

Convert yards to miles, furlongs, feet, meters and kilometers. 1 mile = 1,760 yards exactly (1959 international definition).

Convert yards to meters or meters to yards instantly. 1 yard = 0.9144 m (exact). Includes feet, cm and km. Switch direction with one click.

Convert years to decades, centuries, millennia, months, weeks, days and hours instantly. Supports decimal year inputs.