1. Convert to base units
m3/s = input value x input unit factor
Every supported volumetric flow rate unit is stored as a factor relative to cubic meters per second.
Fluid dynamics unit converter
Flow Rate Unit Converter
Convert volumetric flow rate units for pumps, pipe flow, HVAC, hydraulics, water systems, and fluid engineering calculations.
Live flow rate conversion
Convert flow rate units
Enter a value, choose the starting unit, and select a target unit. The full flow rate conversion table updates automatically.
Converted value
All units
Flow rate conversion table
Compare the entered value across SI, metric, US customary, and HVAC-style volumetric flow units.
Common conversions
Useful flow rate conversion factors
| Conversion | Factor | Typical use |
|---|---|---|
| GPM to L/min | L/min = GPM x 3.785411784 | Pumps and water systems |
| L/min to GPM | GPM = L/min x 0.264172052 | Metric-US flow conversion |
| m3/h to L/s | L/s = m3/h / 3.6 | Pipes and process flow |
| CFM to m3/s | m3/s = CFM x 0.00047194745 | HVAC and ventilation |
| ft3/s to m3/s | m3/s = ft3/s x 0.0283168466 | Hydraulics and open-channel flow |
| L/s to m3/h | m3/h = L/s x 3.6 | Plant and pump data |
How it works
Flow rate conversion method
2. Convert to target units
target value = base value / target unit factor
The selected result and table values are calculated from the same base value.
3. Check precision
rounding depends on scale
Very small and very large values use compact scientific notation to stay readable.
FAQ
Flow rate converter questions
How do you convert GPM to L/min?
Multiply US gallons per minute by 3.785411784 to convert to liters per minute.
How do you convert m3/h to L/s?
Divide m3/h by 3.6 to convert to liters per second.
Does this converter use US gallons?
Yes. GPM and gal/s in this converter use US liquid gallons.
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