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Flow Rate Converter (GPM, L/min, m³/h)

Enter a flow rate and pick units — the conversion updates instantly.

Your text and files never leave your browser — nothing is sent to a server.

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Show all units
  • Cubic meter per second (m³/s)-
  • Cubic meter per hour (m³/h)-
  • Liter per second (L/s)-
  • Liter per minute (L/min)-
  • Liter per hour (L/h)-
  • US gallon per minute (US gpm)-
  • Imperial gallon per minute (imp gpm)-
  • Cubic foot per second (ft³/s)-
  • Cubic foot per minute (ft³/min)-

How to use

  1. Type a flow rate in “Value” and choose the units to convert from and to. The page opens on m³/h → L/min.
  2. GPM on pump data sheets usually means US gallons. Choose imperial gallons per minute for UK sources.
  3. “Show all units” lists the same flow per second, per minute and per hour at once.
  4. The page address keeps your value and units, so you can share the link as is.

FAQ

How many L/min is 1 GPM?

One US gallon per minute is about 3.785 L/min; an imperial GPM is about 4.546 L/min.

How do I convert m³/h to L/min?

A cubic meter is 1000 L and an hour is 60 minutes, so 1 m³/h ≈ 16.67 L/min.

What is CFM used for?

Fan, air purifier and compressor airflow is usually rated in CFM. One CFM is about 1.699 m³/h, or 0.472 L/s.

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