Flow Rate Converter

From

Fluid Dynamics

Volumetric flow rate is the volume of fluid which passes per unit time. It is heavily used in plumbing, HVAC (heating, ventilation, and air conditioning), and chemical engineering. It tells you exactly how fast a pump or pipe can move liquids or gases.

1 GPM

~3.785 L/min

1 m³/h

~0.28 L/s

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Volumetric flow rate measures the volume of fluid (liquid or gas) that passes through a given surface per unit of time. Understanding flow rate is crucial in a wide variety of industries: from plumbers calculating water pressure in residential pipes, to HVAC technicians sizing air ducts, to civil engineers designing municipal water systems. Our Flow Rate Converter provides instant, precise translations between these complex metric and imperial units.

You'll often find different components using completely different measurement systems depending on where they were manufactured. A water pump from Europe might be rated in Liters per minute (L/min) or Cubic meters per hour (m³/h), while an American piping diagram requires the flow in US Gallons per minute (GPM) or Cubic feet per minute (CFM). Incompatible measurements can ruin a project's efficiency.

Our tool solves this by providing seamless math conversions across 7 distinct measurement standards, combining both volume and time metrics without the risk of manual miscalculation.

How to Convert Fluid Flow Rates

1
Enter the known flow rate value into the main input box.
2
Select your starting unit (e.g., US Gallons/Minute) from the 'From' dropdown list.
3
Select the required target unit (e.g., Liters/Second) from the 'To' list.
4
The accurately converted flow rate will update instantly in the result window.

Why Use This Tool?

✓
Eliminates complex volume-over-time math errors
✓
Supports HVAC, plumbing, and engineering units
✓
Fast, instant calculation algorithms
✓
Clear interface on both mobile and desktop
✓
100% Free tool with no API limits
✓
Secure, runs locally in your browser

Common Flow Rate Terms

What is GPM?

GPM stands for Gallons Per Minute. It's the standard metric used in the US for residential plumbing fixtures like showerheads and faucets.

What is CFM?

CFM stands for Cubic Feet per Minute. It is most commonly used in HVAC systems to describe the volume of air an exhaust fan or AC unit can move.

Frequently Asked Questions

Does flow rate depend on the pipe size?

Yes, actual flow rate through a physical pipe depends on pressure, fluid viscosity, and pipe diameter. However, this converter tool strictly performs mathematical translations of the final volume/time output, independent of physical pipe conditions.

Is a UK Gallon different from a US Gallon?

Yes. This converter specifically uses the standard US Liquid Gallon. An Imperial (UK) Gallon is approximately 20% larger than a US Gallon.

Can I use this for gas instead of water?

Absolutely. Volumetric flow rate applies to any fluid, which includes both liquids (water, oil) and gases (air, natural gas). The volume units (like CFM or m³/h) remain identical regardless of the substance.

Is the conversion formula exact?

Yes, we use precise standard modifiers, such as 1 GPM = 0.0630902 L/s.

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