Flow Rate Converter
Liters/minute (L/min)
Definition: Liters per minute (symbol: L/min or LPM) is a metric unit of volumetric flow rate that measures the volume of a fluid (one liter) passing a specific point in one minute.
History/origin: This unit is a direct combination of the metric unit for volume (the liter) and the universal unit of time (the minute). It was adopted for practical everyday flow measurements.
Current use: LPM is widely used to measure water flow in household plumbing (faucets, showers), medical oxygen delivery systems, and laboratory liquid pumps.
Cubic feet/minute (CFM)
Definition: Cubic feet per minute (symbol: CFM or ft³/min) is an imperial and US customary unit of volumetric flow rate. It measures the volume of air or gas (one cubic foot) passing a stationary point in one minute.
History/origin: Before the metric system was widely adopted, CFM became the de facto standard in the US and UK for measuring the movement of air in mines, factories, and early ventilation systems.
Current use: CFM is the absolute industry standard for measuring airflow in Heating, Ventilation, and Air Conditioning (HVAC) systems, computer cooling fans, and industrial air compressors.
Liters/minute (L/min) to Cubic feet/minute (CFM) Conversion Table
| Liters/minute (L/min) [lpm] | Cubic feet/minute (CFM) [cfm] |
|---|---|
| 0.01 lpm | 0.00035315 cfm |
| 0.1 lpm | 0.00353147 cfm |
| 1 lpm | 0.03531467 cfm |
| 2 lpm | 0.07062933 cfm |
| 3 lpm | 0.105944 cfm |
| 5 lpm | 0.17657333 cfm |
| 10 lpm | 0.35314667 cfm |
| 20 lpm | 0.70629333 cfm |
| 50 lpm | 1.76573334 cfm |
| 100 lpm | 3.53146667 cfm |
| 1000 lpm | 35.31466671 cfm |
How to Convert Liters/minute (L/min) to Cubic feet/minute (CFM)
1 lpm = 0.03531467 cfm
1 cfm = 28.3168466 lpm
Example: convert 15 lpm to cfm:
15 lpm = 15 × 0.03531467 cfm = 0.52972 cfm
Did You Know?
- A standard modern showerhead uses about 9.5 Liters per minute (L/min) to save water, whereas older ones used up to 20 L/min!
- CFM (Cubic feet per minute) is the absolute standard for measuring airflow. If you are buying a bathroom exhaust fan or a computer cooling fan, its power is rated in CFM.