GPM to L/s Converter
1 US gallon equals 3.785412 liters. Converting per-minute to per-second involves dividing by 60. So 1 GPM = 3.785412 ÷ 60 = 0.0630902 L/s.
Formula
Source: NIST | Last reviewed: June 7, 2026
Examples
1 GPM (US)
= 0.0631 L/s
1 GPM = 0.0631 L/s
100 GPM (US)
= 6.309 L/s
Where is this used?
Common in water treatment and chemical injection systems.
Frequently Asked Questions
How do I convert L/s back to GPM?
Divide L/s by 0.0630902. For quick estimates, multiply L/s by 15.85 to get GPM.
What is typical domestic water flow in L/s?
A typical household faucet flows about 0.1–0.2 L/s (1.5–3 GPM). A garden hose at full flow is about 0.3–0.4 L/s (5–6 GPM).
Can I use this for gas flow too?
The unit conversion is identical, but GPM is almost exclusively used for liquids. For gas flow, use the CFM-based converters.
Reviewed for accuracy
· Last reviewed: June 7, 2026
All calculations are for reference only. Always verify with manufacturer data and a qualified engineer for critical applications. Learn about our editorial process.