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Flow Rate Converter

Convert flow between L/s, L/min, m³/h, GPM and CFM.

Enter values

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The formula

result = value × (factorₓ / factorᵧ)

Flow rate is volume moved per unit of time, so every conversion here handles both a volume and a time change at once. Plumbing and pumps are usually rated in litres per minute or US gallons per minute, while air handling uses cubic feet per minute.

All calculations run locally in your browser and update instantly as you type.

Example calculations

Common questions this calculator answers — select one to load its values.

How many litres per minute is 10 GPM? 10 gal/min 37.854118 L/min What is 100 m³/h in litres per second? 100 m³/h 27.777778 L/s

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Volume Converter Speed Converter Density Converter

Frequently asked questions

What is GPM?+
Gallons per minute — the standard unit for pumps and plumbing in the US. One US GPM is about 3.79 litres per minute.
What is CFM used for?+
Cubic feet per minute measures air movement, so it is the usual rating for fans, extractors and air conditioning.
All calculations run locally in your browser. Nothing you type is sent to a server.