m³/h to GPM Converter
Convert cubic metres per hour (m³/h) to US gallons per minute (GPM). Multiply by 4.40287. This is the conversion you need when reading an international pump or valve datasheet against US pipe schedules and pump curves.
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m³/h to GPM conversion resultFree download
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Schedule 40 pipe sizes, water flow in GPM and LPM at four design velocities, and recommended velocities by application. One PDF, made to pin above the bench.
How It Works
Equipment sourced from Europe or Asia is rated in m³/h, while US pipe sizing charts, valve Cv tables and pump curves are in GPM. Converting first means you can compare like with like before selecting a pipe diameter or checking a valve coefficient.
m³/h to GPM Formula
GPM = m³/h × 4.40287
One cubic metres per hour equals 4.40287 US gallons per minute. Going the other way, one US gallons per minute equals 0.227125 cubic metres per hour.
Worked Example
Converting 100 m³/h:
100 × 4.40287 = 440.287 GPM
m³/h to GPM Conversion Table
| m³/h | GPM |
|---|---|
| 1 m³/h | 4.40287 GPM |
| 5 m³/h | 22.0143 GPM |
| 10 m³/h | 44.0287 GPM |
| 25 m³/h | 110.072 GPM |
| 50 m³/h | 220.143 GPM |
| 100 m³/h | 440.287 GPM |
| 250 m³/h | 1100.72 GPM |
| 500 m³/h | 2201.43 GPM |
| 1000 m³/h | 4402.87 GPM |
Going the other way? Use the GPM to m³/h converter. For any other unit pair, the full flow rate converter handles all ten supported units.
FAQ
Common questions about converting cubic metres per hour to US gallons per minute.
Frequently Asked Questions
How do I convert m3/h to GPM?
Multiply the m³/h value by 4.40287. For example, 25 m³/h x 4.40287 = 110.072 GPM.
How many m3/h is 1 GPM?
One US gallon per minute equals 0.227125 cubic metres per hour. Going the other way, 1 m³/h is 4.40287 GPM.
What is 10 m3/h in GPM?
10 m³/h equals 44.0287 GPM. Multiplying by 4.4 gives a field estimate accurate to within about 0.07%.
How does m3/h relate to litres per second?
One cubic metre per hour equals 0.2778 litres per second, since a cubic metre is 1000 litres and an hour is 3600 seconds. L/s is often preferred for larger metric water mains.
Do I need to know the fluid to convert m3/h to GPM?
No. Both units are volumetric, so the conversion is independent of the fluid. Density only matters when converting a volumetric flow to a mass flow — use the mass flow rate calculator for that.
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