Flow Rate Converters

Convert between common SI and imperial volumetric flow-rate units used in process, water, and HVAC systems.

Available converter families

SI, imperial, and HVAC flow mirror pairs

Every direction below is a dedicated page so each flow conversion has a direct mirror link.

L/s to L/min L/min to L/s L/s to L/h L/h to L/s L/s to m³/s m³/s to L/s L/s to m³/h m³/h to L/s L/s to gpm gpm to L/s L/s to gpm-uk gpm-uk to L/s L/s to cfm cfm to L/s L/s to cfs cfs to L/s L/min to L/h L/h to L/min L/min to m³/s m³/s to L/min L/min to m³/h m³/h to L/min L/min to gpm gpm to L/min L/min to gpm-uk gpm-uk to L/min L/min to cfm cfm to L/min L/min to cfs cfs to L/min L/h to m³/s m³/s to L/h L/h to m³/h m³/h to L/h L/h to gpm gpm to L/h L/h to gpm-uk gpm-uk to L/h L/h to cfm cfm to L/h L/h to cfs cfs to L/h m³/s to m³/h m³/h to m³/s m³/s to gpm gpm to m³/s m³/s to gpm-uk gpm-uk to m³/s m³/s to cfm cfm to m³/s m³/s to cfs cfs to m³/s m³/h to gpm gpm to m³/h m³/h to gpm-uk gpm-uk to m³/h m³/h to cfm cfm to m³/h m³/h to cfs cfs to m³/h gpm to gpm-uk gpm-uk to gpm gpm to cfm cfm to gpm gpm to cfs cfs to gpm gpm-uk to cfm cfm to gpm-uk gpm-uk to cfs cfs to gpm-uk cfm to cfs cfs to cfm

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Explanation

All flow-rate factors here are derived through liters per second (L/s). SI conversions preserve exact decimal scaling across second, minute, and hour intervals, while US/UK gallons and cubic-foot units are routed through fixed liter equivalents for consistent mirror behavior.

How to use this hub

  1. Choose a converter family.
  2. If converting to/from grams from a volume unit, select an ingredient.
  3. For pure unit changes (volume↔volume or weight↔weight), use universal conversions.

If your conversion includes grams, you’ll choose an ingredient; otherwise you won’t.

Frequently Asked Questions

Why are US gpm and UK gpm different?

They are based on different gallon definitions: 1 US gallon = 3.785411784 L, while 1 UK gallon = 4.54609 L.

How are cfm and cfs related?

They are the same cubic-foot volume with different time bases, so 1 cfs equals exactly 60 cfm.

How do I switch direction?

Use the switch button to navigate directly to the mirror page for the reverse conversion.