Flow Converter
Convert volumetric flow rate between cubic metres, litres and gallons per unit time.
Written by Rahman · Last reviewed
Quick answer
Volumetric flow rate is volume moved per unit time. The SI unit is cubic metres per second: one litre per second is 0.001 m³/s, one US gallon per minute is 6.309 × 10⁻⁵ m³/s and one cubic foot per minute is 4.719 × 10⁻⁴ m³/s. Flow equals cross-sectional area multiplied by average velocity.
| Cubic metre per second (m³/s) | 1 |
| Cubic metre per minute (m³/min) | 59.99999988 |
| Cubic metre per hour (m³/h) | 3599.999971 |
| Litre per second (L/s) | 1000 |
| Litre per minute (L/min) | 59999.9988 |
| Litre per hour (L/h) | 3599999.971 |
| US gallon per minute (gpm) | 15850.32314 |
| Cubic foot per second (ft³/s) | 35.31466671 |
| Cubic foot per minute (cfm) | 2118.879973 |
About the Flow Converter
Volumetric flow rate measures the volume of fluid passing a point per unit of time, such as litres per minute or cubic metres per hour. The SI unit is the cubic metre per second.
This converter is used in plumbing, irrigation, HVAC and process engineering.
Frequently Asked Questions
What is volumetric flow rate?
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It is the volume of fluid that moves past a point each second, minute or hour.
What is the SI unit of flow?
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The SI unit is the cubic metre per second (m³/s). Litres per minute and gallons per minute are common practical units.
How is flow different from mass flow?
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Volumetric flow measures volume per time, while mass flow measures mass per time, and the two differ by the fluid’s density.