Cubic Foot per Minute to Liter per Minute (CFM to LPM)
Convert CFM to LPM — Flow Rate converter
One cubic foot per minute equals 28.316847 LPM, so to convert cubic feet per minute to liters per minute you multiply the value by 28.316847. A cubic foot per minute is larger than a liter per minute — going the other way, 1 LPM = 0.03531467 CFM. For example, 10 CFM = 283.168466 LPM and 50 CFM = 1415.84 LPM.
1 CFM = 28.316847 LPM
Cubic Foot per Minute to Liter per Minute formula
1 Cubic Foot per Minute = 28.316847 LPM
Worked examples
- 25 CFM = 707.921165 LPM
- 100 CFM = 2831.68 LPM
Cubic Foot per Minute to Liter per Minute conversion table
| Cubic Foot per Minute (CFM) | Liter per Minute (LPM) |
|---|---|
| 1 | 28.316847 |
| 2 | 56.633693 |
| 3 | 84.95054 |
| 5 | 141.584233 |
| 8 | 226.534773 |
| 10 | 283.168466 |
| 12 | 339.802159 |
| 15 | 424.752699 |
| 20 | 566.336932 |
| 25 | 707.921165 |
| 50 | 1415.84 |
| 100 | 2831.68 |
| 250 | 7079.21 |
| 500 | 14158.42 |
| 1000 | 28316.85 |
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 CFM = 28.316847 LPM.
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 liters per minute are in one cubic foot per minute?
One cubic foot per minute equals 28.316847 liters per minute (LPM).
How many cubic feet per minute are in one liter per minute?
One liter per minute equals 0.03531467 cubic feet per minute (CFM).
How do you convert cubic feet per minute to liters per minute?
1 Cubic Foot per Minute = 28.316847 LPM. Use the calculator above for any value.
What is 5 CFM in LPM?
5 CFM = 141.584233 LPM.
What is 100 CFM in LPM?
100 CFM = 2831.68 LPM.
What is 10 CFM in LPM?
10 CFM = 283.168466 LPM.
What is 20 CFM in LPM?
20 CFM = 566.336932 LPM.
What is 50 CFM in LPM?
50 CFM = 1415.84 LPM.
What is 500 CFM in LPM?
500 CFM = 14158.42 LPM.
Is a cubic foot per minute bigger than a liter per minute?
Yes. A cubic foot per minute is larger — one cubic foot per minute equals 28.316847 liters per minute (LPM).