Engineering

Flow Rate Conversion: m³/s, L/min, and Gallons per Minute

Convert between m³/s, L/min, GPM, and other flow rate units. Guide for plumbing and hydraulics.

Flow rate measures volume per unit time. Critical in plumbing, irrigation, and process engineering.

Volumetric Flow Rate

Q = Volume ÷ Time. SI unit: m³/s. Practical units: L/min for plumbing, GPM in the US.

Key Conversions

  • 1 m³/s = 60,000 L/min
  • 1 L/min = 0.2642 GPM
  • 1 GPM = 3.785 L/min

Practical References

Garden hose: 15–20 L/min (4–5 GPM). Kitchen faucet: 6–8 L/min. Fire hydrant: 1,500–3,800 L/min.

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Frequently Asked Questions

How do I convert L/min to GPM?
Divide L/min by 3.785. For example, 20 L/min ÷ 3.785 = 5.28 GPM.

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