Formulas & unit definitions
Base: this tool uses m³/s internally.
- 1 L = 1×10−3 m³
- 1 US gal = 3.785411784 L
- 1 Imp gal = 4.54609 L
- 1 ft³ = 0.028316846592 m³
- 1 in³ = 1.6387064×10−5 m³
Examples
US gpm → L/s: L/s = gpm × 3.785411784 ÷ 60 = gpm × 0.0630901964
m³/h → L/min: L/min = (m³/h × 1000) ÷ 60 = m³/h × 16.6667
FAQ
US vs Imperial gallons?
They are different by ~20%. Choose the correct gallon family (US or Imperial) in the dropdowns.
When to use L/s vs m³/h?
L/s is frequent in lab/process calculations; m³/h is common in HVAC, water, and industrial specifications.