Cubic Foot per Second to Gallon (US) per Hour (CFS to gal/h)
Convert CFS to gal/h — Flow Rate converter
One cubic foot per second equals 26929.87 gal/h, so to convert cubic feet per second to gallons (US) per hour you multiply the value by 26929.87. A cubic foot per second is larger than a gallon (US) per hour — going the other way, 1 gal/h = 0.0000371335 CFS. For example, 10 CFS = 269298.7 gal/h and 50 CFS = 1346493.51 gal/h.
1 CFS = 26929.87 gal/h
Cubic Foot per Second to Gallon (US) per Hour formula
1 Cubic Foot per Second = 26929.87 gal/h
Worked examples
- 25 CFS = 673246.75 gal/h
- 100 CFS = 2692987.01 gal/h
Cubic Foot per Second to Gallon (US) per Hour conversion table
| Cubic Foot per Second (CFS) | Gallon (US) per Hour (gal/h) |
|---|---|
| 1 | 26929.87 |
| 2 | 53859.74 |
| 3 | 80789.61 |
| 5 | 134649.35 |
| 8 | 215438.96 |
| 10 | 269298.7 |
| 12 | 323158.44 |
| 15 | 403948.05 |
| 20 | 538597.4 |
| 25 | 673246.75 |
| 50 | 1346493.51 |
| 100 | 2692987.01 |
| 250 | 6732467.53 |
| 500 | 13464935.07 |
| 1000 | 26929870.13 |
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 CFS = 26929.87 gal/h.
Frequently asked questions
How many gallons (US) per hour are in one cubic foot per second?
One cubic foot per second equals 26929.87 gallons (US) per hour (gal/h).
How many cubic feet per second are in one gallon (US) per hour?
One gallon (US) per hour equals 0.0000371335 cubic feet per second (CFS).
How do you convert cubic feet per second to gallons (US) per hour?
1 Cubic Foot per Second = 26929.87 gal/h. Use the calculator above for any value.
What is 5 CFS in gal/h?
5 CFS = 134649.35 gal/h.
What is 100 CFS in gal/h?
100 CFS = 2692987.01 gal/h.
What is 10 CFS in gal/h?
10 CFS = 269298.7 gal/h.
What is 20 CFS in gal/h?
20 CFS = 538597.4 gal/h.
What is 50 CFS in gal/h?
50 CFS = 1346493.51 gal/h.
What is 500 CFS in gal/h?
500 CFS = 13464935.07 gal/h.
Is a cubic foot per second bigger than a gallon (US) per hour?
Yes. A cubic foot per second is larger — one cubic foot per second equals 26929.87 gallons (US) per hour (gal/h).