Cubic Foot per Second to Cubic Foot per Minute (CFS to CFM)
Convert CFS to CFM — Flow Rate converter
One cubic foot per second equals 60 CFM, so to convert cubic feet per second to cubic feet per minute you multiply the value by 60. A cubic foot per second is larger than a cubic foot per minute — going the other way, 1 CFM = 0.01666667 CFS. For example, 10 CFS = 600 CFM and 50 CFS = 3000 CFM.
1 CFS = 60 CFM
Cubic Foot per Second to Cubic Foot per Minute formula
1 Cubic Foot per Second = 60 CFM
Worked examples
- 25 CFS = 1500 CFM
- 100 CFS = 6000 CFM
Cubic Foot per Second to Cubic Foot per Minute conversion table
| Cubic Foot per Second (CFS) | Cubic Foot per Minute (CFM) |
|---|---|
| 1 | 60 |
| 2 | 120 |
| 3 | 180 |
| 5 | 300 |
| 8 | 480 |
| 10 | 600 |
| 12 | 720 |
| 15 | 900 |
| 20 | 1200 |
| 25 | 1500 |
| 50 | 3000 |
| 100 | 6000 |
| 250 | 15000 |
| 500 | 30000 |
| 1000 | 60000 |
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 = 60 CFM.
CFM to metric is worth memorising: one cubic foot is exactly 0.028316846592 m³, so 1 CFM = 1.699011 m³/h and 1,000 CFM ≈ 1,699 m³/h. Note that CFM on a compressor may be quoted as free air delivery (FAD) at inlet conditions rather than at working pressure — the two are not interchangeable.
Frequently asked questions
How many cubic feet per minute are in one cubic foot per second?
One cubic foot per second equals 60 cubic feet per minute (CFM).
How many cubic feet per second are in one cubic foot per minute?
One cubic foot per minute equals 0.01666667 cubic feet per second (CFS).
How do you convert cubic feet per second to cubic feet per minute?
1 Cubic Foot per Second = 60 CFM. Use the calculator above for any value.
What is 5 CFS in CFM?
5 CFS = 300 CFM.
What is 100 CFS in CFM?
100 CFS = 6000 CFM.
What is 10 CFS in CFM?
10 CFS = 600 CFM.
What is 20 CFS in CFM?
20 CFS = 1200 CFM.
What is 50 CFS in CFM?
50 CFS = 3000 CFM.
What is 500 CFS in CFM?
500 CFS = 30000 CFM.
Is a cubic foot per second bigger than a cubic foot per minute?
Yes. A cubic foot per second is larger — one cubic foot per second equals 60 cubic feet per minute (CFM).