Cubic Foot per Second to Gallon (US) per Minute (CFS to GPM)
Convert CFS to GPM — Flow Rate converter
One cubic foot per second equals 448.831169 GPM, so to convert cubic feet per second to gallons (US) per minute you multiply the value by 448.831169. A cubic foot per second is larger than a gallon (US) per minute — going the other way, 1 GPM = 0.0022280093 CFS. For example, 10 CFS = 4488.31 GPM and 50 CFS = 22441.56 GPM.
1 CFS = 448.831169 GPM
Cubic Foot per Second to Gallon (US) per Minute formula
1 Cubic Foot per Second = 448.831169 GPM
Worked examples
- 25 CFS = 11220.78 GPM
- 100 CFS = 44883.12 GPM
Cubic Foot per Second to Gallon (US) per Minute conversion table
| Cubic Foot per Second (CFS) | Gallon (US) per Minute (GPM) |
|---|---|
| 1 | 448.831169 |
| 2 | 897.662338 |
| 3 | 1346.49 |
| 5 | 2244.16 |
| 8 | 3590.65 |
| 10 | 4488.31 |
| 12 | 5385.97 |
| 15 | 6732.47 |
| 20 | 8976.62 |
| 25 | 11220.78 |
| 50 | 22441.56 |
| 100 | 44883.12 |
| 250 | 112207.79 |
| 500 | 224415.58 |
| 1000 | 448831.17 |
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 = 448.831169 GPM.
Frequently asked questions
How many gallons (US) per minute are in one cubic foot per second?
One cubic foot per second equals 448.831169 gallons (US) per minute (GPM).
How many cubic feet per second are in one gallon (US) per minute?
One gallon (US) per minute equals 0.0022280093 cubic feet per second (CFS).
How do you convert cubic feet per second to gallons (US) per minute?
1 Cubic Foot per Second = 448.831169 GPM. Use the calculator above for any value.
What is 5 CFS in GPM?
5 CFS = 2244.16 GPM.
What is 100 CFS in GPM?
100 CFS = 44883.12 GPM.
What is 10 CFS in GPM?
10 CFS = 4488.31 GPM.
What is 20 CFS in GPM?
20 CFS = 8976.62 GPM.
What is 50 CFS in GPM?
50 CFS = 22441.56 GPM.
What is 500 CFS in GPM?
500 CFS = 224415.58 GPM.
Is a cubic foot per second bigger than a gallon (US) per minute?
Yes. A cubic foot per second is larger — one cubic foot per second equals 448.831169 gallons (US) per minute (GPM).