Built and fact-checked by the DocNectar team — see our editorial standards
Key Features
Instant Calculation
Get accurate results in real time with our optimized algorithm.
Mobile Friendly
Fully responsive design. Works on all devices & screen sizes.
Privacy Focused
Your data stays on your device. We don't store any inputs.
100% Free
No hidden costs. This tool is completely free forever.
Volume flow rate describes how much fluid or gas moves through a system per unit of time, and shows up on pump specs, HVAC airflow ratings, and plumbing fixture datasheets.
Different industries and regions default to different units — metric liters per minute, imperial gallons per minute, or airflow-focused cubic feet per minute — making this converter useful for comparing equipment specs across unit systems.
How it works
Enter a flow rate value, choose the unit you're converting from, and the unit you want to convert to. The tool applies the standard conversion factors between liters per minute, liters per second, gallons per minute, cubic meters per hour, and cubic feet per minute, and returns the result.
- Enter value.
- Enter from.
- Enter to.
- Click Calculate to see your results.
Examples
Comparing a pump's flow rate
A pump rated at 10 gallons per minute converts to about 37.85 liters per minute.
Who should use it
- Comparing pump, faucet, or irrigation flow rate specifications across unit systems.
- Converting HVAC or ventilation airflow ratings given in CFM to metric units.
Industry applications
- Plumbing and irrigation
- HVAC and mechanical engineering
Advantages
- Covers both liquid flow units (L/min, GPM) and airflow units (CFM) in one tool.
- Exact, standards-based conversion factors.
Common mistakes to avoid
- Comparing a liquid flow rate (GPM, L/min) directly against an airflow rate (CFM) as if they were interchangeable.
- Forgetting that flow rate includes a time component, so it can't be converted using the same factors as a plain volume converter.
Best practices
- When comparing pump or fixture specifications from different manufacturers, convert to the same unit first, since US and metric datasheets rarely share one convention.
Tips
- Keep in mind that liquid flow units (L/min, GPM) and airflow units (CFM) measure different substances — always confirm which one a spec sheet is actually reporting before converting.