Gallon (US) per Minute to Liter per Hour (GPM to LPH)
Convert GPM to LPH — Flow Rate converter
One gallon (US) per minute equals 227.124707 LPH, so to convert gallons (US) per minute to liters per hour you multiply the value by 227.124707. A gallon (US) per minute is larger than a liter per hour — going the other way, 1 LPH = 0.0044028675 GPM. For example, 10 GPM = 2271.25 LPH and 50 GPM = 11356.24 LPH.
1 GPM = 227.124707 LPH
Gallon (US) per Minute to Liter per Hour formula
1 Gallon (US) per Minute = 227.124707 LPH
Worked examples
- 25 GPM = 5678.12 LPH
- 100 GPM = 22712.47 LPH
Gallon (US) per Minute to Liter per Hour conversion table
| Gallon (US) per Minute (GPM) | Liter per Hour (LPH) |
|---|---|
| 1 | 227.124707 |
| 2 | 454.249414 |
| 3 | 681.374121 |
| 5 | 1135.62 |
| 8 | 1817 |
| 10 | 2271.25 |
| 12 | 2725.5 |
| 15 | 3406.87 |
| 20 | 4542.49 |
| 25 | 5678.12 |
| 50 | 11356.24 |
| 100 | 22712.47 |
| 250 | 56781.18 |
| 500 | 113562.35 |
| 1000 | 227124.71 |
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 = 227.124707 LPH.
Frequently asked questions
How many liters per hour are in one gallon (US) per minute?
One gallon (US) per minute equals 227.124707 liters per hour (LPH).
How many gallons (US) per minute are in one liter per hour?
One liter per hour equals 0.0044028675 gallons (US) per minute (GPM).
How do you convert gallons (US) per minute to liters per hour?
1 Gallon (US) per Minute = 227.124707 LPH. Use the calculator above for any value.
What is 5 GPM in LPH?
5 GPM = 1135.62 LPH.
What is 100 GPM in LPH?
100 GPM = 22712.47 LPH.
What is 10 GPM in LPH?
10 GPM = 2271.25 LPH.
What is 20 GPM in LPH?
20 GPM = 4542.49 LPH.
What is 50 GPM in LPH?
50 GPM = 11356.24 LPH.
What is 500 GPM in LPH?
500 GPM = 113562.35 LPH.
Is a gallon (US) per minute bigger than a liter per hour?
Yes. A gallon (US) per minute is larger — one gallon (US) per minute equals 227.124707 liters per hour (LPH).