Authoritative definitions of the International System of Units and SI prefixes.
Unit conversion
Cubic metres per hour to US gallons per minute Converter
1 m³/h ≈ 4.4028675393 gpm. Enter a value to convert m³/h to gpm, then use the formula and table below. Displayed digits may be rounded.
Flow rateInstant result
Decimals
Formula result = input × 0.0002777777777777778 ÷ 0.0000630901964. 1 m³/h ≈ 4.4029 gpm
Nonzero results too small for the selected decimal places use scientific notation.
Nonzero results too small for the selected decimal places use scientific notation.
Common examples
One value, several units
Cubic metres per second0.0003 m³/s
Litres per second0.2778 L/s
Litres per minute16.6667 L/min
US gallons per minute4.4029 gpm
Cubic feet per minute0.5886 cfm
Conversion table
| m³/h | gpm |
|---|---|
| 1 m³/h | 4.4029 gpm |
| 2 m³/h | 8.8057 gpm |
| 5 m³/h | 22.0143 gpm |
| 10 m³/h | 44.0287 gpm |
| 25 m³/h | 110.0717 gpm |
| 50 m³/h | 220.1434 gpm |
| 100 m³/h | 440.2868 gpm |
Conversion chart
1 m³/h4.4029 gpm
5 m³/h22.0143 gpm
10 m³/h44.0287 gpm
25 m³/h110.0717 gpm
50 m³/h220.1434 gpm
Worked example
1 m³/h ≈ 4.4028675393 gpm. Apply the selected conversion formula to other input values.
Unit definition
Cubic metres per hour (m³/h) One cubic metres per hour equals 0.000277777777778 cubic metre per second.
Unit history
Cubic metres per hour 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 m³/h to cubic metre per second.
3. Convert the base value to gpm and apply your display precision.
Understand the result before using it
Cubic metres per hour to US gallons per minute converts a value measured in Cubic metres per hour (m³/h) into the equivalent value in US gallons per minute (gpm). 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 × 0.0002777777777777778 ÷ 0.0000630901964
Assumptions
- Cubic metres per hour and US gallons per minute represent the same flow rate quantity.
- The input is expressed in m³/h; the output is expressed in gpm.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 m³/h ≈ 4.4028675393 gpm. 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 m³/h measurement in a document that expects gpm.
- Compare a cubic metres per hour value with a value reported in us gallons per minute.
- Check the m³/h to gpm arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse m³/h 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 Cubic metres per hour to US gallons per minute?
result = input × 0.0002777777777777778 ÷ 0.0000630901964. Input is in m³/h; result is in gpm. 1 m³/h ≈ 4.4028675393 gpm. The displayed digits may be rounded.
What is 1 m³/h in gpm?
1 m³/h ≈ 4.4028675393 gpm. The displayed digits may be rounded.
Can I reverse the m³/h to gpm conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts gpm back to m³/h.
Is the Cubic metres per hour to US gallons per minute 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.