Cubic Feet per Minute (CFM)	Liters per Second (L/s)
1 CFM	0.4719 L/s
2 CFM	0.9439 L/s
5 CFM	2.3597 L/s
10 CFM	4.7195 L/s
25 CFM	11.7987 L/s
50 CFM	23.5974 L/s
100 CFM	47.1947 L/s
250 CFM	117.9869 L/s
500 CFM	235.9737 L/s
1000 CFM	471.9474 L/s

Volumetric Flow Rate Unit Conversions

Free online volumetric flow rate converter. Instantly convert between Cubic Feet per Minute, Liters per Second, Liters per Minute, Cubic Meters per Hour, Cubic Meters per Second, and more with exact scientific formulas.

Understanding Volumetric Flow Rate Conversions

The standard SI unit of volumetric flow rate is cubic meters per second (m³/s), representing the volume of fluid that passes through a given cross-sectional area per second.

Supported Volumetric Flow Rate Units (7 Units)

Cubic Feet per Minute (CFM) (HVAC airflow & PC cooling fans) — 1 CFM = 0.000472 m³/s
Liter per Second (L/s) (Plumbing & hydraulic flows) — 1 L/s = 0.001 m³/s
Liter per Minute (L/min) (Medical oxygen & tap water flow) — 1 L/min = 0.000017 m³/s
Cubic Meter per Hour (m³/h) (Industrial ventilation & pumps) — 1 m³/h = 0.000278 m³/s
Cubic Meter per Second (m³/s) (SI base unit (Hydroelectric & river discharge)) — Primary SI / Base Reference Unit
US Gallon per Minute (GPM) (US plumbing, pumps & fire hydrants) — 1 GPM = 0.000063 m³/s
US Gallon per Hour (GPH) (Fuel consumption & aquarium filtration) — 1 GPH = 0.000001 m³/s

Popular Volumetric Flow Rate Conversions

Cubic Feet per Minute ⇄ Liter per Second

Multiply CFM by ~0.471947 to calculate airflow in liters per second (L/s).

Liter per Second ⇄ Cubic Feet per Minute

Multiply liters per second by ~2.11888 to calculate airflow in CFM.

US Gallon per Minute ⇄ Liter per Minute

Multiply US GPM by ~3.78541 to calculate flow in liters per minute (L/min).

Cubic Meter per Hour ⇄ Cubic Feet per Minute

Multiply cubic meters per hour by ~0.588578 to calculate airflow in CFM.

Cubic Feet per Minute ⇄ Cubic Meter per Hour

Multiply CFM by ~1.69901 to convert to cubic meters per hour (m³/h).

Frequently Asked Questions

Common questions and verified calculations for volumetric flow rate units.

How do you convert CFM to liters per second (L/s)?

Multiply the CFM value by 0.471947. For example, a 100 CFM ventilation fan moves approximately 47.19 L/s of air.

What is CFM and why is it important in HVAC?

CFM stands for Cubic Feet per Minute. It measures the volume of air moved by a fan, air conditioner, or ventilation system every minute. Proper CFM ensures adequate heating, cooling, and air exchange in residential and commercial spaces.

How do you convert US Gallons per Minute (GPM) to Liters per Minute (L/min)?

Multiply GPM by 3.78541. For example, a 5 GPM water pump or showerhead delivers approximately 18.93 liters per minute.