Building & DIY

Flow Rate Calculator (Liters per Minute)

Enter a volume and the time it took to fill, and you get the flow rate in liters per minute. It also shows the same rate in gallons per minute, cubic meters per hour, liters per second, and CFM.

How to use
  1. Enter the volume and the time it took to fill or drain.
  2. Choose what to solve for: flow rate, the volume, or the time to fill.
Estimates only, allow for waste and confirm against local building codes and supplier specs.
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Common questions

How do I convert L/min to GPM?

Divide by 3.785 for US gallons. So 10 L/min is about 2.64 US GPM.

What's a normal kitchen faucet flow rate?

Most US faucets run around 5.7 to 8.3 L/min (1.5 to 2.2 GPM). Fill a measured jug and time it to check yours.

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