單位轉換

在平方公尺、平方英尺、英畝、公頃、平方英里、平方公里等之間換算面積——即時且精確。

使用每日更新的即時匯率，在主要世界貨幣之間換算。

在 kg/m3、g/cm3、g/ml、kg/L、lb/ft3 與 lb/in3 之間快速精確地換算密度，適用於科學與工程。

以官方不可撤銷的固定換算匯率 1 EUR = 1.95583 BGN，雙向換算保加利亞列弗與歐元，並依法律規定進行四捨五入。

在瓦、千瓦、兆瓦、馬力、公制馬力、每小時 BTU 與每秒英尺磅之間換算功率。

將數字轉換為羅馬數字，並將羅馬數字轉換回數字（1–3999），可雙向轉換，採用標準的減法記數規則。

快速精確地換算 m/s、km/h、mph、節與每秒英尺。

以精確公式即時換算攝氏、華氏、克耳文與蘭金。

在公升、毫升、立方公尺、美制加侖、夸脫、品脫、杯、液量盎司、湯匙與英制加侖之間換算體積。

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

在度、弧度、百分度、角分、角秒與圈之間換算角度——即時且精確。

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

估算資料經 Base64 編碼後的大小，包含約 33% 的額外負擔，以及可選的換行／data-URI 填充。

將十進位數字轉換為壓縮 BCD 格式（反之亦然），每個數字以自己的 4 位元 nibble 編碼。

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.

在茶匙、湯匙、液量盎司、杯、品脫、夸脫、毫升與公升之間換算烹飪計量。

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.

精確換算位元組、KB、MB、GB、TB 以及二進位的 KiB、MiB、GiB 單位。

在每秒位元、kbit/s、Mbit/s、Gbit/s 以及位元組、KB/s、MB/s、GB/s 之間即時換算資料傳輸速率。

計算在考慮協定／額外負擔效率的情況下，資料集通過連結的實際傳輸時間，以獲得有效吞吐量。

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.

根據檔案大小和連線速度估算下載時間，結果以清晰的 hh:mm:ss 格式顯示。

交換 16／32／64 位元十六進位值的位元組順序，以在大端序和小端序之間轉換。

在焦耳、千焦耳、卡路里、千卡、瓦時、千瓦時、BTU、英尺磅與電子伏特之間換算能量。

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.

在牛頓、千牛頓、達因、磅力、公斤力與盎司力之間快速精確地換算力。

在赫茲、千赫、兆赫、吉赫、太赫與每分鐘轉數（rpm）之間即時換算頻率。

在 L/100km、每公升公里數、美制每加侖英里數與英制每加侖英里數之間精確換算燃油經濟性。

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.

在標準二進位和反射格雷碼之間轉換，其中相鄰值恰好相差一個位元。

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.

在公分與英尺英寸之間轉換身高。切換方向以進行 公分 → 英尺/英寸 或 英尺/英寸 → 公分，並顯示以公尺為單位的數值。免費、即時且精確。

將十六進位顏色代碼（#RGB 或 #RRGGBB）轉換為紅、綠、藍通道值和 CSS rgb() 字串。

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

將十進位數字分解為 32 位（單精度）和 64 位（雙精度）IEEE-754 的符號、指數和尾數位元。

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.

在公尺、公里、英里、英尺、英寸、碼等之間換算——即時且精確。

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.

將任何整數在二進制、八進制、十進制和十六進制之間轉換。輸入數值、選擇其進制，即可立即看到全部四種表示法。

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.

在帕、千帕、兆帕、巴、psi、大氣壓、mmHg 與托之間換算壓力——快速且精確。

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.

將紅、綠、藍值（0-255）轉換為 #RRGGBB 十六進位代碼，以及可直接使用的 CSS rgb() 字串。

將 RGB 顏色通道轉換為 HSL（色相度數、飽和度和明度百分比），以便更輕鬆地調整顏色。

在奈秒、微秒、毫秒、秒、分、時、日、週、月與年之間即時換算時間。

在牛頓米、千牛頓米、磅英尺、磅英寸與公斤力米之間精確換算扭矩。

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.

根據位元率和時長（含可選音軌）估算影片檔案大小，或反向計算位元率。

檢查兩個十六進位顏色之間的對比度，以及是否符合 WCAG AA／AAA 對一般文字和大型文字的要求。

快速精確地換算公斤、公克、磅、盎司、英石與公噸。

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.