Liter per Hour to Cubic Foot per Minute (LPH to CFM)
Convert LPH to CFM — Flow Rate converter
One liter per hour equals 0.0005885778 CFM, so to convert liters per hour to cubic feet per minute you multiply the value by 0.0005885778. A liter per hour is smaller than a cubic foot per minute — going the other way, 1 CFM = 1699.01 LPH. For example, 10 LPH = 0.0058857778 CFM and 50 LPH = 0.02942889 CFM.
1 LPH = 0.0005885778 CFM
Liter per Hour to Cubic Foot per Minute formula
1 Liter per Hour = 0.0005885778 CFM
Worked examples
- 25 LPH = 0.01471444 CFM
- 100 LPH = 0.05885778 CFM
Liter per Hour to Cubic Foot per Minute conversion table
| Liter per Hour (LPH) | Cubic Foot per Minute (CFM) |
|---|---|
| 1 | 0.0005885778 |
| 2 | 0.0011771556 |
| 3 | 0.0017657333 |
| 5 | 0.0029428889 |
| 8 | 0.0047086222 |
| 10 | 0.0058857778 |
| 12 | 0.0070629333 |
| 15 | 0.0088286667 |
| 20 | 0.01177156 |
| 25 | 0.01471444 |
| 50 | 0.02942889 |
| 100 | 0.05885778 |
| 250 | 0.14714444 |
| 500 | 0.29428889 |
| 1000 | 0.58857778 |
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 LPH = 0.0005885778 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 hour?
One liter per hour equals 0.0005885778 cubic feet per minute (CFM).
How many liters per hour are in one cubic foot per minute?
One cubic foot per minute equals 1699.01 liters per hour (LPH).
How do you convert liters per hour to cubic feet per minute?
1 Liter per Hour = 0.0005885778 CFM. Use the calculator above for any value.
What is 5 LPH in CFM?
5 LPH = 0.0029428889 CFM.
What is 100 LPH in CFM?
100 LPH = 0.05885778 CFM.
What is 10 LPH in CFM?
10 LPH = 0.0058857778 CFM.
What is 20 LPH in CFM?
20 LPH = 0.01177156 CFM.
What is 50 LPH in CFM?
50 LPH = 0.02942889 CFM.
What is 500 LPH in CFM?
500 LPH = 0.29428889 CFM.
Is a liter per hour bigger than a cubic foot per minute?
No. A liter per hour is smaller — one liter per hour equals 0.0005885778 cubic feet per minute, while one cubic foot per minute equals 1699.01 liters per hour.