Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
US gallons per minute to Cubic metres per hour
Convert gpm to m³/h instantly, then review the formula, assumptions, and rounding guidance.
Flow rateInstant result
Decimals
Formula result = input × 0.0000630901964 ÷ 0.0002777777777777778. 1 gpm = 0.2271 m³/h
Common examples
One value, several units
Cubic metres per second0.0001 m³/s
Litres per second0.0631 L/s
Litres per minute3.7854 L/min
Cubic metres per hour0.2271 m³/h
Cubic feet per minute0.1337 cfm
Conversion table
| gpm | m³/h |
|---|---|
| 1 gpm | 0.2271 m³/h |
| 2 gpm | 0.4542 m³/h |
| 5 gpm | 1.1356 m³/h |
| 10 gpm | 2.2712 m³/h |
| 25 gpm | 5.6781 m³/h |
| 50 gpm | 11.3562 m³/h |
| 100 gpm | 22.7125 m³/h |
Conversion chart
1 gpm0.2271 m³/h
5 gpm1.1356 m³/h
10 gpm2.2712 m³/h
25 gpm5.6781 m³/h
50 gpm11.3562 m³/h
Worked example
60 litres per minute equals 1 litre per second.
Unit definition
US gallons per minute (gpm) One us gallons per minute equals 0.0000630901964 cubic metre per second.
Unit history
US gallons per minute is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert gpm to cubic metre per second.
3. Convert the base value to m³/h and apply your display precision.
Understand the result before using it
US gallons per minute to Cubic metres per hour converts a value measured in US gallons per minute (gpm) into the equivalent value in Cubic metres per hour (m³/h). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 0.0000630901964 ÷ 0.0002777777777777778
Assumptions
- US gallons per minute and Cubic metres per hour represent the same flow rate quantity.
- The input is expressed in gpm; the output is expressed in m³/h.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 gpm = 0.22712470704 m³/h. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a gpm measurement in a document that expects m³/h.
- Compare a us gallons per minute value with a value reported in cubic metres per hour.
- Check the gpm-to-m³/h arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse gpm with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert US gallons per minute to Cubic metres per hour?
result = input × 0.0000630901964 ÷ 0.0002777777777777778 Using the displayed relationship, 1 gpm equals 0.22712470704 m³/h.
How many Cubic metres per hour are in one US gallons per minute?
One US gallons per minute is 0.22712470704 Cubic metres per hour. The displayed digits may be rounded.
Can I reverse the gpm to m³/h conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts m³/h back to gpm.
Is the US gallons per minute to Cubic metres per hour result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.