Gallon (US) per Hour to Cubic Meter per Second (gal/h to m³/s)
Convert gal/h to m³/s — Flow Rate converter
Also written as gal/h to m3/s.
One gallon (US) per hour equals 0.0000010515 m³/s, so to convert gallons (US) per hour to cubic meters per second you multiply the value by 0.0000010515. A gallon (US) per hour is smaller than a cubic meter per second — going the other way, 1 m³/s = 951019.39 gal/h. For example, 10 gal/h = 0.000010515 m³/s and 50 gal/h = 0.0000525752 m³/s.
1 gal/h = 0.0000010515 m³/s
Gallon (US) per Hour to Cubic Meter per Second formula
1 Gallon (US) per Hour = 0.0000010515 m³/s
Worked examples
- 25 gal/h = 0.0000262876 m³/s
- 100 gal/h = 0.0001051503 m³/s
Gallon (US) per Hour to Cubic Meter per Second conversion table
| Gallon (US) per Hour (gal/h) | Cubic Meter per Second (m³/s) |
|---|---|
| 1 | 0.0000010515 |
| 2 | 0.000002103 |
| 3 | 0.0000031545 |
| 5 | 0.0000052575 |
| 8 | 0.000008412 |
| 10 | 0.000010515 |
| 12 | 0.000012618 |
| 15 | 0.0000157725 |
| 20 | 0.0000210301 |
| 25 | 0.0000262876 |
| 50 | 0.0000525752 |
| 100 | 0.0001051503 |
| 250 | 0.0002628758 |
| 500 | 0.0005257516 |
| 1000 | 0.0010515033 |
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 = 0.0000010515 m³/s.
Frequently asked questions
How many cubic meters per second are in one gallon (US) per hour?
One gallon (US) per hour equals 0.0000010515 cubic meters per second (m³/s).
How many gallons (US) per hour are in one cubic meter per second?
One cubic meter per second equals 951019.39 gallons (US) per hour (gal/h).
How do you convert gallons (US) per hour to cubic meters per second?
1 Gallon (US) per Hour = 0.0000010515 m³/s. Use the calculator above for any value.
What is 5 gal/h in m³/s?
5 gal/h = 0.0000052575 m³/s.
What is 100 gal/h in m³/s?
100 gal/h = 0.0001051503 m³/s.
What is 10 gal/h in m³/s?
10 gal/h = 0.000010515 m³/s.
What is 20 gal/h in m³/s?
20 gal/h = 0.0000210301 m³/s.
What is 50 gal/h in m³/s?
50 gal/h = 0.0000525752 m³/s.
What is 500 gal/h in m³/s?
500 gal/h = 0.0005257516 m³/s.
Is a gallon (US) per hour bigger than a cubic meter per second?
No. A gallon (US) per hour is smaller — one gallon (US) per hour equals 0.0000010515 cubic meters per second, while one cubic meter per second equals 951019.39 gallons (US) per hour.