Gallon (US) per Hour to Gallon (US) per Second (gal/h to gal/s)
Convert gal/h to gal/s — Flow Rate converter
One gallon (US) per hour equals 0.0002777778 gal/s, so to convert gallons (US) per hour to gallons (US) per second you multiply the value by 0.0002777778. A gallon (US) per hour is smaller than a gallon (US) per second — going the other way, 1 gal/s = 3600 gal/h. For example, 10 gal/h = 0.0027777778 gal/s and 50 gal/h = 0.01388889 gal/s.
1 gal/h = 0.0002777778 gal/s
Gallon (US) per Hour to Gallon (US) per Second formula
1 Gallon (US) per Hour = 0.0002777778 gal/s
Worked examples
- 25 gal/h = 0.0069444444 gal/s
- 100 gal/h = 0.02777778 gal/s
Gallon (US) per Hour to Gallon (US) per Second conversion table
| Gallon (US) per Hour (gal/h) | Gallon (US) per Second (gal/s) |
|---|---|
| 1 | 0.0002777778 |
| 2 | 0.0005555556 |
| 3 | 0.0008333333 |
| 5 | 0.0013888889 |
| 8 | 0.0022222222 |
| 10 | 0.0027777778 |
| 12 | 0.0033333333 |
| 15 | 0.0041666667 |
| 20 | 0.0055555556 |
| 25 | 0.0069444444 |
| 50 | 0.01388889 |
| 100 | 0.02777778 |
| 250 | 0.06944444 |
| 500 | 0.13888889 |
| 1000 | 0.27777778 |
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 = 0.0002777778 gal/s.
Frequently asked questions
How many gallons (US) per second are in one gallon (US) per hour?
One gallon (US) per hour equals 0.0002777778 gallons (US) per second (gal/s).
How many gallons (US) per hour are in one gallon (US) per second?
One gallon (US) per second equals 3600 gallons (US) per hour (gal/h).
How do you convert gallons (US) per hour to gallons (US) per second?
1 Gallon (US) per Hour = 0.0002777778 gal/s. Use the calculator above for any value.
What is 5 gal/h in gal/s?
5 gal/h = 0.0013888889 gal/s.
What is 100 gal/h in gal/s?
100 gal/h = 0.02777778 gal/s.
What is 10 gal/h in gal/s?
10 gal/h = 0.0027777778 gal/s.
What is 20 gal/h in gal/s?
20 gal/h = 0.0055555556 gal/s.
What is 50 gal/h in gal/s?
50 gal/h = 0.01388889 gal/s.
What is 500 gal/h in gal/s?
500 gal/h = 0.13888889 gal/s.
Is a gallon (US) per hour bigger than a gallon (US) per second?
No. A gallon (US) per hour is smaller — one gallon (US) per hour equals 0.0002777778 gallons (US) per second, while one gallon (US) per second equals 3600 gallons (US) per hour.