Liter per Minute to Cubic Foot per Minute (LPM to CFM)
Convert LPM to CFM — Flow Rate converter
One liter per minute equals 0.03531467 CFM, so to convert liters per minute to cubic feet per minute you multiply the value by 0.03531467. A liter per minute is smaller than a cubic foot per minute — going the other way, 1 CFM = 28.316847 LPM. For example, 10 LPM = 0.35314667 CFM and 50 LPM = 1.765733 CFM.
1 LPM = 0.03531467 CFM
Liter per Minute to Cubic Foot per Minute formula
1 Liter per Minute = 0.03531467 CFM
Worked examples
- 25 LPM = 0.88286667 CFM
- 100 LPM = 3.531467 CFM
Liter per Minute to Cubic Foot per Minute conversion table
| Liter per Minute (LPM) | Cubic Foot per Minute (CFM) |
|---|---|
| 1 | 0.03531467 |
| 2 | 0.07062933 |
| 3 | 0.105944 |
| 5 | 0.17657333 |
| 8 | 0.28251733 |
| 10 | 0.35314667 |
| 12 | 0.423776 |
| 15 | 0.52972 |
| 20 | 0.70629333 |
| 25 | 0.88286667 |
| 50 | 1.765733 |
| 100 | 3.531467 |
| 250 | 8.828667 |
| 500 | 17.657333 |
| 1000 | 35.314667 |
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 LPM = 0.03531467 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 liter per minute?
One liter per minute equals 0.03531467 cubic feet per minute (CFM).
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 do you convert liters per minute to cubic feet per minute?
1 Liter per Minute = 0.03531467 CFM. Use the calculator above for any value.
What is 5 LPM in CFM?
5 LPM = 0.17657333 CFM.
What is 100 LPM in CFM?
100 LPM = 3.531467 CFM.
What is 10 LPM in CFM?
10 LPM = 0.35314667 CFM.
What is 20 LPM in CFM?
20 LPM = 0.70629333 CFM.
What is 50 LPM in CFM?
50 LPM = 1.765733 CFM.
What is 500 LPM in CFM?
500 LPM = 17.657333 CFM.
Is a liter per minute bigger than a cubic foot per minute?
No. A liter per minute is smaller — one liter per minute equals 0.03531467 cubic feet per minute, while one cubic foot per minute equals 28.316847 liters per minute.