Gallon (US) per Minute to Cubic Meter per Hour (GPM to m³/h)
Convert GPM to m³/h — Flow Rate converter
Also written as GPM to m3/h.
One gallon (US) per minute equals 0.22712471 m³/h, so to convert gallons (US) per minute to cubic meters per hour you multiply the value by 0.22712471. A gallon (US) per minute is smaller than a cubic meter per hour — going the other way, 1 m³/h = 4.402868 GPM. For example, 10 GPM = 2.271247 m³/h and 50 GPM = 11.356235 m³/h.
1 GPM = 0.22712471 m³/h
Gallon (US) per Minute to Cubic Meter per Hour formula
1 Gallon (US) per Minute = 0.22712471 m³/h
Worked examples
- 25 GPM = 5.678118 m³/h
- 100 GPM = 22.712471 m³/h
Gallon (US) per Minute to Cubic Meter per Hour conversion table
| Gallon (US) per Minute (GPM) | Cubic Meter per Hour (m³/h) |
|---|---|
| 1 | 0.22712471 |
| 2 | 0.45424941 |
| 3 | 0.68137412 |
| 5 | 1.135624 |
| 8 | 1.816998 |
| 10 | 2.271247 |
| 12 | 2.725496 |
| 15 | 3.406871 |
| 20 | 4.542494 |
| 25 | 5.678118 |
| 50 | 11.356235 |
| 100 | 22.712471 |
| 250 | 56.781177 |
| 500 | 113.562354 |
| 1000 | 227.124707 |
Which gallon, and which trade
The single most expensive mistake in flow conversion is the gallon. A US liquid gallon is 3.785411784 litres; an imperial gallon is 4.54609 litres. US GPM and imperial GPM differ by about 20%, and pump datasheets frequently do not say which one they mean. Check the manufacturer's country of origin before trusting a GPM figure.
Different trades default to different units for the same physical quantity: HVAC and compressed air work in CFM, plumbing and pumps in GPM or LPM, and process and water engineering in m³/h or L/s. A specification that mixes them is usually quoting different equipment, not different flows. On this page, 1 GPM = 0.22712471 m³/h.
Frequently asked questions
How many cubic meters per hour are in one gallon (US) per minute?
One gallon (US) per minute equals 0.22712471 cubic meters per hour (m³/h).
How many gallons (US) per minute are in one cubic meter per hour?
One cubic meter per hour equals 4.402868 gallons (US) per minute (GPM).
How do you convert gallons (US) per minute to cubic meters per hour?
1 Gallon (US) per Minute = 0.22712471 m³/h. Use the calculator above for any value.
What is 5 GPM in m³/h?
5 GPM = 1.135624 m³/h.
What is 100 GPM in m³/h?
100 GPM = 22.712471 m³/h.
What is 10 GPM in m³/h?
10 GPM = 2.271247 m³/h.
What is 20 GPM in m³/h?
20 GPM = 4.542494 m³/h.
What is 50 GPM in m³/h?
50 GPM = 11.356235 m³/h.
What is 500 GPM in m³/h?
500 GPM = 113.562354 m³/h.
Is a gallon (US) per minute bigger than a cubic meter per hour?
No. A gallon (US) per minute is smaller — one gallon (US) per minute equals 0.22712471 cubic meters per hour, while one cubic meter per hour equals 4.402868 gallons (US) per minute.