Popular flow rate conversions
Flow rate units
Volumetric flow rate is volume per unit time, used for pumps, taps, HVAC and ventilation.
| Unit | Symbol | In cubic meters per second | Definition |
|---|---|---|---|
| Milliliter per minute | mL/min | 1.666666667 × 10⁻⁸ m³/s | |
| Liter per second | L/s | 0.001 m³/s | |
| Liter per minute | L/min | 0.00001666666667 m³/s | |
| Liter per hour | L/h | 0.0000002777777778 m³/s | |
| Cubic meter per second | m³/s | 1 m³/s | |
| Cubic meter per hour | m³/h | 0.0002777777778 m³/s | |
| US gallon per minute | gpm | 0.0000630901964 m³/s | |
| Cubic foot per minute | CFM | 0.0004719474432 m³/s |
Calculate with flow rate
The smart calculator does arithmetic across flow rate units and picks a sensible unit for the answer. Try 20 L/min to gpm.
Questions and answers
Which flow rate units can I convert?
All 8: milliliters per minute, liters per second, liters per minute, liters per hour, cubic meters per second, cubic meters per hour, US gallons per minute, cubic feet per minute.
What is the SI unit of flow rate?
This converter uses the cubic meter per second (m³/s) as its base unit. Volumetric flow rate is volume per unit time, used for pumps, taps, HVAC and ventilation.
How precise are the results?
Factors are the exact legal definitions where one exists (an inch is exactly 2.54 cm, a pound exactly 0.45359237 kg). Results show 10 significant digits by default; the precision menu offers 4 to 15.
Does the flow rate converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.