GPH to m³/h Converter
Enter the flow rate in gph below to convert it to m³/h.
Convert GPH (US) to m³/h
Enter a value in gph (us) (GPH) to convert to m³/h (m³/h).
US Gallons per Hour to Cubic Meters per Hour Conversion Table
Table showing various us gallons per hour measurements converted to m³/h. Click any preset value or arrow to load it into the converter.
| GPH (US) (GPH) | m³/h (m³/h) |
|---|---|
| 1 GPH | 0.0037854 m³/h |
| 2 GPH | 0.0075708 m³/h |
| 2.5 GPH | 0.0094635 m³/h |
| 5 GPH | 0.0189271 m³/h |
| 10 GPH | 0.0378541 m³/h |
| 15 GPH | 0.0567812 m³/h |
| 20 GPH | 0.0757082 m³/h |
| 25 GPH | 0.0946353 m³/h |
| 30 GPH | 0.1135624 m³/h |
| 50 GPH | 0.1892706 m³/h |
How to Convert GPH to m³/h
To convert gph to m³/h, multiply the flow rate by the following conversion ratio: 0.0037854 m³/h/us gallons per hour.
Since one us gallons per hour is equal to 0.0037854 m³/h, you can use this simple formula to convert:
The flow rate in m³/h is equal to the flow rate in gph multiplied by 0.0037854.
For example, here's how to convert 5 gph to m³/h using the formula above.
How Many m³/h Are in a US Gallons per Hour?
There are 0.0037854 m³/h in a us gallons per hour, which is why we use this value in the formula above.
Our us gallons per hour to cubic meters per hour calculator automatically converts your flow rate measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
GPH and m³/h are both units used to measure flow rate. Keep reading to learn more about each unit.
What Is a US Gallons per Hour?
A us gallons per hour is a unit of flow rate equal to 0.0630902 liters per minute (L/min), the base unit for flow rate. Equal to 1/60 GPM (0.06309 L/min). [1]
The us gallons per hour is classified as a US customary unit of flow rate. GPH can be abbreviated as GPH; for example, 1 us gallons per hour can be written as 1 GPH.
When working with gph (GPH) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, gph (GPH) are widely used across standard flow rate applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Cubic Meters per Hour?
A cubic meters per hour is a unit of flow rate equal to 16.6666667 liters per minute (L/min), the base unit for flow rate. Equal to 16.6667 L/min. [2]
The cubic meters per hour is classified as a metric and SI-compatible unit of flow rate. m³/h can be abbreviated as m³/h; for example, 1 cubic meters per hour can be written as 1 m³/h.
When working with m³/h (m³/h) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, m³/h (m³/h) are widely used across standard flow rate applications within SI metric workflows, engineering documentation, and technical data sheets.
When converting flow rate between gph (GPH) and m³/h (m³/h), keep full floating-point precision (1 GPH = 0.0037854 m³/h; 1 m³/h = 264.1720524 GPH) during intermediate calculations and round only the final cubic meters per hour figure to match your instrument tolerance.
More US Gallons per Hour & Cubic Meters per Hour Conversions
Need to calculate in the opposite direction? Use our m³/h to gph (us) calculator to switch your starting unit immediately. You can also explore related tools such as converting m³/h to gph (us), converting cfm to m³/h, or converting gpm (us) to m³/h.
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Volume Divided by Time))·Flow Rate Metrology Standard — GPH (US) (GPH) to m³/h (m³/h)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Volume & Flow Capacity)·Unit Specifications: US Gallons per Hour (GPH) (GPH) & Cubic Meters per Hour (m³/h)
- [3]BIPM ReferenceBIPM (Coherent Volumetric Flow Units (m³/s))·Conversion Factors & Mathematical Basis (GPH to m³/h)