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Quick answer
1 m³/h is approximately 4.4029 US gallons per minute or 3.6662 Imperial gallons per minute. Multiply the m³/h value by the factor for your selected gallon standard. US and Imperial GPM are different, so check the standard on the equipment datasheet.
How to use
Enter the known values, check the selected units and assumptions, then calculate. Compare the result with the worked example. Copy, print or export the table when you need a record. Select US liquid gallons or Imperial gallons explicitly. A US gallon is 3.785411784 litres; an Imperial gallon is 4.54609 litres. The hour-to-minute change also divides by 60. Changing the direction preserves the selected standard.
Formula and method
US GPM = m³/h / (60 × 0.003785411784); Imperial GPM = m³/h / (60 × 0.00454609)
Worked example
1 m³/h ≈ 4.4029 US GPM ≈ 3.6662 Imperial GPM
Assumptions and limits
A result labelled only GPM can be ambiguous. Confirm the gallon standard on the pump or meter datasheet. This is volumetric flow, not velocity or mass flow; pipe diameter, density and pressure are separate inputs for other calculations.
Sources and methodology
Method reviewed:
Frequently asked questions
How is the result calculated?
Select US liquid gallons or Imperial gallons explicitly. A US gallon is 3.785411784 litres; an Imperial gallon is 4.54609 litres. The hour-to-minute change also divides by 60. Changing the direction preserves the selected standard.
What should I check before using the result?
A result labelled only GPM can be ambiguous. Confirm the gallon standard on the pump or meter datasheet. This is volumetric flow, not velocity or mass flow; pipe diameter, density and pressure are separate inputs for other calculations.
Are my inputs sent to a server?
Calculations run in your browser. This plugin does not send your entered values to a server or save them. Other site analytics are governed by the site privacy policy.