Pounds Per Minute Calculator — Mass Flow Rate Converter
Enter a mass flow rate in any unit — pounds per minute, per hour, per second, kilograms per minute, kilograms per hour, or grams per second — and instantly get all equivalent rates plus a 60-minute accumulation chart.
Unit
Mass flow rate in pounds per minute
- 1
Input flow rate
10 lb/min - 2
Conversion factor to lb/min
1Multiply the input by this factor to obtain lb/min. - 3
Pounds per minute
10 × 1 = 10
How does this calculator work?
1 lb/min = 60 lb/hr = 0.01667 lb/s = 16 oz/min = 0.4536 kg/min = 27.216 kg/hr = 7.56 g/s. Convert any mass flow rate by entering it in the field and selecting the unit. The accumulation chart shows total mass over 60 minutes at that rate — useful for sizing tanks, hoppers and batch processes.
Formula
How this is calculated
A mass flow rate describes how much mass moves past a point per unit of time — standard in chemical engineering, food processing, industrial conveying and HVAC. This calculator converts between the most common imperial and metric mass-flow units by first normalising everything to pounds per minute, then multiplying by each target unit's conversion factor. The exact factor between pounds and kilograms is 1 lb = 0.45359237 kg (the international avoirdupois definition), so 1 lb/min = 0.45359237 kg/min exactly.
The accumulation chart plots the total mass delivered over 60 minutes at the current rate, which helps visualise batch sizes or storage capacity needs. For example, a conveyor belt moving 10 lb/min accumulates 600 lb (≈ 272 kg) per hour — visible directly on the chart.
Note that mass flow rate differs from volumetric flow rate (e.g., gallons per minute, m³/hr): mass flow is independent of pressure and temperature, whereas volumetric flow changes with the density of the fluid or material. To convert between them you need the material density (mass flow = volumetric flow × density).
Frequently asked questions
Divide pounds per hour by 60 to get pounds per minute, then multiply by 0.45359237 to get kilograms per minute. For example, 300 lb/hr ÷ 60 = 5 lb/min × 0.4536 = 2.268 kg/min. Enter 300 lb/hr above to see all conversions at once.
Mass flow rate (lb/min, kg/hr, etc.) measures how much mass passes a point per unit time, regardless of how the material expands or contracts. Volumetric flow rate (gal/min, m³/hr, etc.) measures volume per unit time and depends on density, which changes with temperature and pressure. Mass flow is preferred in process industries because it is conserved.
Different industries standardised on different units before global unit harmonisation. US food and pharmaceutical industries often use lb/min; European chemical plants prefer kg/hr; aerospace uses kg/s or g/s for fuel burn. This calculator lets you work in your native unit and read results in any other.
Also known as
TG we-Calculate Editorial Team. (2026). Pounds Per Minute Calculator — Mass Flow Rate Converter [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/pounds-per-minute-calculator
TG we-Calculate Editorial Team. "Pounds Per Minute Calculator — Mass Flow Rate Converter." TG we-Calculate. 2026. https://we-calculate.com/calculator/pounds-per-minute-calculator.
TG we-Calculate Editorial Team, "Pounds Per Minute Calculator — Mass Flow Rate Converter," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/pounds-per-minute-calculator
@misc{wecalculate_pounds_per_minute_calculator, title = {Pounds Per Minute Calculator — Mass Flow Rate Converter}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/pounds-per-minute-calculator}}, year = {2026}, note = {TG we-Calculate} }
Did this calculator help you?