Volumetric Flow Rate Converter
Convert between cubic meters per second, liters per minute, GPM and other flow rate units.
The Volumetric Flow Rate Converter is a free online tool that converts flow rate values between cubic meters per second (m³/s), liters per minute (L/min), gallons per minute (GPM), and cubic feet per minute (CFM) instantly. No sign-up needed — enter a value, choose your units, and get an accurate result. It's a practical reference for plumbers, HVAC technicians, and engineers comparing equipment specifications across regions.
What is volumetric flow rate?
Volumetric flow rate measures how much fluid or gas moves through a system over time, and it's essential for plumbing, HVAC, irrigation, and industrial process design. Different industries and regions use different units, so this tool helps you compare pump, pipe, or ventilation specs across standards. Pump and fan specifications from different manufacturers don't always share the same default unit, making a reliable converter genuinely useful.
How to use the Volumetric Flow Rate Converter
- Enter the flow rate value you want to convert.
- Select the unit to convert from — m³/s, L/min, GPM, or CFM.
- Click Calculate to see the equivalent across units.
Key features
- Supports m³/s, L/min, GPM and CFM.
- Useful for plumbing, HVAC, irrigation, and industrial design.
- Instant, accurate two-way conversion.
- Free and works directly in your browser.
Related tools
Working with related units? Try the Volume Converter, Time Converter, or the Speed Converter.
Frequently asked questions
Is the Volumetric Flow Rate Converter free?
Yes, it's completely free with no sign-up required. There's no limit on how many conversions you can run for a project.
How do I convert L/min to GPM?
Divide the liters-per-minute value by approximately 3.78541 to get US gallons per minute. This conversion is especially useful when comparing pump specifications listed in different regional unit systems.
Where is flow rate used?
Flow rate specs appear in plumbing fixtures, HVAC ductwork, irrigation systems, and industrial piping to describe how fast fluid or air moves. Ductwork and ventilation systems are typically sized using CFM ratings to ensure adequate airflow.
What's the difference between GPM and CFM?
GPM measures liquid flow in gallons per minute, while CFM measures gas or air flow in cubic feet per minute — they apply to different types of fluids. Choosing the correct unit ensures pumps, pipes, and ducts are sized appropriately for the intended flow.
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