Gallon (US) per Minute to Gallon (US) per Hour (GPM to gal/h)
Convert GPM to gal/h — Flow Rate converter
One gallon (US) per minute equals 60 gal/h, so to convert gallons (US) per minute to gallons (US) per hour you multiply the value by 60. A gallon (US) per minute is larger than a gallon (US) per hour — going the other way, 1 gal/h = 0.01666667 GPM. For example, 10 GPM = 600 gal/h and 50 GPM = 3000 gal/h.
1 GPM = 60 gal/h
Gallon (US) per Minute to Gallon (US) per Hour formula
1 Gallon (US) per Minute = 60 gal/h
Worked examples
- 25 GPM = 1500 gal/h
- 100 GPM = 6000 gal/h
Gallon (US) per Minute to Gallon (US) per Hour conversion table
| Gallon (US) per Minute (GPM) | Gallon (US) per Hour (gal/h) |
|---|---|
| 1 | 60 |
| 2 | 120 |
| 3 | 180 |
| 5 | 300 |
| 8 | 480 |
| 10 | 600 |
| 12 | 720 |
| 15 | 900 |
| 20 | 1200 |
| 25 | 1500 |
| 50 | 3000 |
| 100 | 6000 |
| 250 | 15000 |
| 500 | 30000 |
| 1000 | 60000 |
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 = 60 gal/h.
Frequently asked questions
How many gallons (US) per hour are in one gallon (US) per minute?
One gallon (US) per minute equals 60 gallons (US) per hour (gal/h).
How many gallons (US) per minute are in one gallon (US) per hour?
One gallon (US) per hour equals 0.01666667 gallons (US) per minute (GPM).
How do you convert gallons (US) per minute to gallons (US) per hour?
1 Gallon (US) per Minute = 60 gal/h. Use the calculator above for any value.
What is 5 GPM in gal/h?
5 GPM = 300 gal/h.
What is 100 GPM in gal/h?
100 GPM = 6000 gal/h.
What is 10 GPM in gal/h?
10 GPM = 600 gal/h.
What is 20 GPM in gal/h?
20 GPM = 1200 gal/h.
What is 50 GPM in gal/h?
50 GPM = 3000 gal/h.
What is 500 GPM in gal/h?
500 GPM = 30000 gal/h.
Is a gallon (US) per minute bigger than a gallon (US) per hour?
Yes. A gallon (US) per minute is larger — one gallon (US) per minute equals 60 gallons (US) per hour (gal/h).