Gallon (US) per Second to Cubic Meter per Second (gal/s to m³/s)
Convert gal/s to m³/s — Flow Rate converter
Also written as gal/s to m3/s.
One gallon (US) per second equals 0.0037854118 m³/s, so to convert gallons (US) per second to cubic meters per second you multiply the value by 0.0037854118. A gallon (US) per second is smaller than a cubic meter per second — going the other way, 1 m³/s = 264.172052 gal/s. For example, 10 gal/s = 0.03785412 m³/s and 50 gal/s = 0.18927059 m³/s.
1 gal/s = 0.0037854118 m³/s
Gallon (US) per Second to Cubic Meter per Second formula
1 Gallon (US) per Second = 0.0037854118 m³/s
Worked examples
- 25 gal/s = 0.09463529 m³/s
- 100 gal/s = 0.37854118 m³/s
Gallon (US) per Second to Cubic Meter per Second conversion table
| Gallon (US) per Second (gal/s) | Cubic Meter per Second (m³/s) |
|---|---|
| 1 | 0.0037854118 |
| 2 | 0.0075708236 |
| 3 | 0.01135624 |
| 5 | 0.01892706 |
| 8 | 0.03028329 |
| 10 | 0.03785412 |
| 12 | 0.04542494 |
| 15 | 0.05678118 |
| 20 | 0.07570824 |
| 25 | 0.09463529 |
| 50 | 0.18927059 |
| 100 | 0.37854118 |
| 250 | 0.94635295 |
| 500 | 1.892706 |
| 1000 | 3.785412 |
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 = 0.0037854118 m³/s.
Frequently asked questions
How many cubic meters per second are in one gallon (US) per second?
One gallon (US) per second equals 0.0037854118 cubic meters per second (m³/s).
How many gallons (US) per second are in one cubic meter per second?
One cubic meter per second equals 264.172052 gallons (US) per second (gal/s).
How do you convert gallons (US) per second to cubic meters per second?
1 Gallon (US) per Second = 0.0037854118 m³/s. Use the calculator above for any value.
What is 5 gal/s in m³/s?
5 gal/s = 0.01892706 m³/s.
What is 100 gal/s in m³/s?
100 gal/s = 0.37854118 m³/s.
What is 10 gal/s in m³/s?
10 gal/s = 0.03785412 m³/s.
What is 20 gal/s in m³/s?
20 gal/s = 0.07570824 m³/s.
What is 50 gal/s in m³/s?
50 gal/s = 0.18927059 m³/s.
What is 500 gal/s in m³/s?
500 gal/s = 1.892706 m³/s.
Is a gallon (US) per second bigger than a cubic meter per second?
No. A gallon (US) per second is smaller — one gallon (US) per second equals 0.0037854118 cubic meters per second, while one cubic meter per second equals 264.172052 gallons (US) per second.