Flow Rate Converter — L/min, GPM & CFM

Convert between liters per minute, US gallons per minute, cubic feet per minute, and m³/h.

—
How this conversion works. Every rate is converted through m³/s (SI) using exact US gallon and cubic-foot definitions from NIST Special Publication 811.

How to use

  1. Choose the units to convert from and to.
  2. Enter a value — the converted result updates instantly.
  3. Click Copy to copy the result to your clipboard.

Frequently asked questions

How do I convert us gallon per minute to liter per minute?

1 us gallon per minute = 3.78541 liter per minute. Choose "US gallon per minute (GPM)" as From and "Liter per minute (L/min)" as To, type a value, and the result updates instantly.

How many L/min is 1 GPM?

1 US GPM = 3.785 L/min exactly (the US gallon definition). A typical shower head flows 1.8–2.5 GPM, or about 7–9.5 L/min.

Is CFM a mass or volume flow?

Volume. CFM is cubic feet per minute of air at actual conditions; SCFM references standard temperature and pressure so it can act as a mass proxy. This tool converts the volumetric value.

Is my data sent to a server?

No. Conversions run entirely in your browser using fixed factors — nothing is uploaded or logged.

Last updated

Powered by maratool