Gallon (US) per Hour to Gallon (US) per Minute (gal/h to GPM)
Convert gal/h to GPM — Flow Rate converter
One gallon (US) per hour equals 0.01666667 GPM, so to convert gallons (US) per hour to gallons (US) per minute you multiply the value by 0.01666667. A gallon (US) per hour is smaller than a gallon (US) per minute — going the other way, 1 GPM = 60 gal/h. For example, 10 gal/h = 0.16666667 GPM and 50 gal/h = 0.83333333 GPM.
1 gal/h = 0.01666667 GPM
Gallon (US) per Hour to Gallon (US) per Minute formula
1 Gallon (US) per Hour = 0.01666667 GPM
Worked examples
- 25 gal/h = 0.41666667 GPM
- 100 gal/h = 1.666667 GPM
Gallon (US) per Hour to Gallon (US) per Minute conversion table
| Gallon (US) per Hour (gal/h) | Gallon (US) per Minute (GPM) |
|---|---|
| 1 | 0.01666667 |
| 2 | 0.03333333 |
| 3 | 0.05 |
| 5 | 0.08333333 |
| 8 | 0.13333333 |
| 10 | 0.16666667 |
| 12 | 0.2 |
| 15 | 0.25 |
| 20 | 0.33333333 |
| 25 | 0.41666667 |
| 50 | 0.83333333 |
| 100 | 1.666667 |
| 250 | 4.166667 |
| 500 | 8.333333 |
| 1000 | 16.666667 |
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 gal/h = 0.01666667 GPM.
Frequently asked questions
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 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 do you convert gallons (US) per hour to gallons (US) per minute?
1 Gallon (US) per Hour = 0.01666667 GPM. Use the calculator above for any value.
What is 5 gal/h in GPM?
5 gal/h = 0.08333333 GPM.
What is 100 gal/h in GPM?
100 gal/h = 1.666667 GPM.
What is 10 gal/h in GPM?
10 gal/h = 0.16666667 GPM.
What is 20 gal/h in GPM?
20 gal/h = 0.33333333 GPM.
What is 50 gal/h in GPM?
50 gal/h = 0.83333333 GPM.
What is 500 gal/h in GPM?
500 gal/h = 8.333333 GPM.
Is a gallon (US) per hour bigger than a gallon (US) per minute?
No. A gallon (US) per hour is smaller — one gallon (US) per hour equals 0.01666667 gallons (US) per minute, while one gallon (US) per minute equals 60 gallons (US) per hour.