Understanding Flow Rate
Flow rate quantifies the movement of liquids and gases. In physics, volumetric flow rate Q is the product of flow velocity (v) and conduit cross-sectional area (A): Q = v × A.
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Flow Rate Converter
Convert volumetric flow rate units including cubic meters per second, liters per minute, GPM, and CFM.
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36,000 Cubic Meter per Hour
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Educational Guide
HVAC and Ventilation Engineering
Building engineers calculate room air changes per hour (ACH) using CFM or m³/h to ensure proper indoor air quality, thermal comfort, and smoke extraction.
Plumbing and Irrigation Sizing
Selecting water pipes, garden drip lines, and fire sprinkler systems requires matching pipe diameters to target GPM or L/min flow rates to maintain adequate water pressure.
Volumetric vs Mass Flow Rate
Volumetric flow rate measures fluid volume per second (e.g. m³/s), whereas mass flow rate measures kilograms per second (kg/s). For compressible gases, mass flow meters are often preferred.
Frequently Asked Questions
What is volumetric flow rate?
Volumetric flow rate is the volume of fluid (liquid or gas) which passes per unit of time through a given cross-sectional area.
How many liters per minute is 1 US Gallon per Minute (GPM)?
1 US GPM is equal to approximately 3.78541 liters per minute (L/min).
What does CFM measure?
CFM stands for Cubic Feet per Minute. It is the standard imperial unit measuring the volume of airflow moved by fans, HVAC blowers, and air compressors.
How do I convert CFM to m³/h?
Multiply the CFM value by 1.699011 to convert it directly into cubic meters per hour (m³/h).
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