# How to Convert M3/H to GPM

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Engineers and others working with fluid transport systems can choose from a wide variety of units to describe the flow rate of liquids. One common unit based on the metric system is cubic meters per hour (m3/h) which is a measure of the volume of liquid, in cubic meters, which flows through a pipe each hour. Another measure of flow, which is non-metric, is gallons per minute (gpm). You can convert from m3/h to gpm using a single conversion factor.

### Things You'll Need

• Calculator
• Enter the value of the fluid flow rate, in units of m3/h, into the calculator. For example, if you had a hose which was expelling water at a rate of 50 m3/h, you would enter 50.

• Multiply the value you just entered by 4.403. This is the conversion factor between m3/h and gpm.

• Report the result of your calculation as the fluid flow rate in units of gpm. In the case of the example, you would calculate 50 times 4.403 and obtain a result of 220 gpm.

## Tips & Warnings

• The conversion factor in this procedure is for U.S. gallons.

## References

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