Gallon (US) per Minute to Liter per Second (GPM to LPS)
Convert GPM to LPS — Flow Rate converter
One gallon (US) per minute equals 0.0630902 LPS, so to convert gallons (US) per minute to liters per second you multiply the value by 0.0630902. A gallon (US) per minute is smaller than a liter per second — going the other way, 1 LPS = 15.850323 GPM. For example, 10 GPM = 0.63090196 LPS and 50 GPM = 3.15451 LPS.
1 GPM = 0.0630902 LPS
Gallon (US) per Minute to Liter per Second formula
1 Gallon (US) per Minute = 0.0630902 LPS
Worked examples
- 25 GPM = 1.577255 LPS
- 100 GPM = 6.30902 LPS
Gallon (US) per Minute to Liter per Second conversion table
| Gallon (US) per Minute (GPM) | Liter per Second (LPS) |
|---|---|
| 1 | 0.0630902 |
| 2 | 0.12618039 |
| 3 | 0.18927059 |
| 5 | 0.31545098 |
| 8 | 0.50472157 |
| 10 | 0.63090196 |
| 12 | 0.75708236 |
| 15 | 0.94635295 |
| 20 | 1.261804 |
| 25 | 1.577255 |
| 50 | 3.15451 |
| 100 | 6.30902 |
| 250 | 15.772549 |
| 500 | 31.545098 |
| 1000 | 63.090196 |
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 = 0.0630902 LPS.
Frequently asked questions
How many liters per second are in one gallon (US) per minute?
One gallon (US) per minute equals 0.0630902 liters per second (LPS).
How many gallons (US) per minute are in one liter per second?
One liter per second equals 15.850323 gallons (US) per minute (GPM).
How do you convert gallons (US) per minute to liters per second?
1 Gallon (US) per Minute = 0.0630902 LPS. Use the calculator above for any value.
What is 5 GPM in LPS?
5 GPM = 0.31545098 LPS.
What is 100 GPM in LPS?
100 GPM = 6.30902 LPS.
What is 10 GPM in LPS?
10 GPM = 0.63090196 LPS.
What is 20 GPM in LPS?
20 GPM = 1.261804 LPS.
What is 50 GPM in LPS?
50 GPM = 3.15451 LPS.
What is 500 GPM in LPS?
500 GPM = 31.545098 LPS.
Is a gallon (US) per minute bigger than a liter per second?
No. A gallon (US) per minute is smaller — one gallon (US) per minute equals 0.0630902 liters per second, while one liter per second equals 15.850323 gallons (US) per minute.