GPM to m³/h Converter
Convert US gallons per minute (GPM) to cubic metres per hour (m³/h). Multiply by 0.227125, or divide by 4.40287. m³/h is the standard flow unit on European and international pump and valve datasheets.
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GPM to m³/h conversion resultFree download
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How It Works
When a US-specified duty in GPM has to be matched against a European pump curve, valve Kv table or process datasheet, m³/h is the unit you need. It is the dominant industrial flow unit outside North America, particularly for process plant, HVAC hydronics and water treatment.
GPM to m³/h Formula
m³/h = GPM × 0.227125
One US gallons per minute equals 0.227125 cubic metres per hour. Going the other way, one cubic metres per hour equals 4.40287 US gallons per minute.
Worked Example
Converting 100 GPM:
100 × 0.227125 = 22.7125 m³/h
GPM to m³/h Conversion Table
| GPM | m³/h |
|---|---|
| 1 GPM | 0.227125 m³/h |
| 5 GPM | 1.13562 m³/h |
| 10 GPM | 2.27125 m³/h |
| 25 GPM | 5.67811 m³/h |
| 50 GPM | 11.3562 m³/h |
| 100 GPM | 22.7125 m³/h |
| 250 GPM | 56.7811 m³/h |
| 500 GPM | 113.562 m³/h |
| 1000 GPM | 227.125 m³/h |
Going the other way? Use the m³/h to GPM converter. For any other unit pair, the full flow rate converter handles all ten supported units.
FAQ
Common questions about converting US gallons per minute to cubic metres per hour.
Frequently Asked Questions
How do I convert GPM to m3/h?
Multiply the GPM value by 0.227125. For example, 100 GPM x 0.227125 = 22.7125 m³/h.
How many GPM is 1 m3/h?
One cubic metre per hour equals 4.40287 US gallons per minute. Conversely, 1 GPM is 0.227125 m³/h.
What is 50 GPM in cubic metres per hour?
50 GPM equals 11.3562 m³/h. A quick approximation is to divide GPM by 4.4.
Why do European datasheets use m3/h?
m³/h fits the scale of industrial pumps and process lines in metric units, and it pairs naturally with head in metres for pump curves. Valve sizing outside North America uses Kv, which is defined in m³/h at one bar of pressure drop.
Is m3/h the same as CMH?
Yes. CMH, m³/h and cubic metres per hour all denote the same unit. CMH appears most often on HVAC and fan equipment.
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