Gallon (US) per Second to Liter per Second (gal/s to LPS)
Convert gal/s to LPS — Flow Rate converter
One gallon (US) per second equals 3.785412 LPS, so to convert gallons (US) per second to liters per second you multiply the value by 3.785412. A gallon (US) per second is larger than a liter per second — going the other way, 1 LPS = 0.26417205 gal/s. For example, 10 gal/s = 37.854118 LPS and 50 gal/s = 189.270589 LPS.
1 gal/s = 3.785412 LPS
Gallon (US) per Second to Liter per Second formula
1 Gallon (US) per Second = 3.785412 LPS
Worked examples
- 25 gal/s = 94.635295 LPS
- 100 gal/s = 378.541178 LPS
Gallon (US) per Second to Liter per Second conversion table
| Gallon (US) per Second (gal/s) | Liter per Second (LPS) |
|---|---|
| 1 | 3.785412 |
| 2 | 7.570824 |
| 3 | 11.356235 |
| 5 | 18.927059 |
| 8 | 30.283294 |
| 10 | 37.854118 |
| 12 | 45.424941 |
| 15 | 56.781177 |
| 20 | 75.708236 |
| 25 | 94.635295 |
| 50 | 189.270589 |
| 100 | 378.541178 |
| 250 | 946.352946 |
| 500 | 1892.71 |
| 1000 | 3785.41 |
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/s = 3.785412 LPS.
Frequently asked questions
How many liters per second are in one gallon (US) per second?
One gallon (US) per second equals 3.785412 liters per second (LPS).
How many gallons (US) per second are in one liter per second?
One liter per second equals 0.26417205 gallons (US) per second (gal/s).
How do you convert gallons (US) per second to liters per second?
1 Gallon (US) per Second = 3.785412 LPS. Use the calculator above for any value.
What is 5 gal/s in LPS?
5 gal/s = 18.927059 LPS.
What is 100 gal/s in LPS?
100 gal/s = 378.541178 LPS.
What is 10 gal/s in LPS?
10 gal/s = 37.854118 LPS.
What is 20 gal/s in LPS?
20 gal/s = 75.708236 LPS.
What is 50 gal/s in LPS?
50 gal/s = 189.270589 LPS.
What is 500 gal/s in LPS?
500 gal/s = 1892.71 LPS.
Is a gallon (US) per second bigger than a liter per second?
Yes. A gallon (US) per second is larger — one gallon (US) per second equals 3.785412 liters per second (LPS).