Volumetric flow
Convert US gallon per hour (US gph) to cubic metre per hour (m³/h). Volumetric flow rate is the volume of fluid passing a point per unit time — the basis for line sizing, pump duty, and instrument ranging.
1 US gph = 0.003785412 m³/h
To convert US gallon per hour to cubic metre per hour, multiply the US gph value by 0.003785412. To go the other way, divide by 0.003785412 (or multiply by 264.172).
| US gph | m³/h |
|---|---|
| 1 | 0.003785412 |
| 2 | 0.007570824 |
| 5 | 0.01892706 |
| 10 | 0.03785412 |
| 25 | 0.0946353 |
| 50 | 0.1892706 |
| 100 | 0.3785412 |
| 250 | 0.946353 |
| 500 | 1.892706 |
| 1000 | 3.785412 |
Pump and line duties are quoted in m³/h or US gpm; instrument and utility flows often in L/min or ft³/s.
Volumetric flow depends on temperature and pressure for gases — convert on the same basis (actual vs standard) to avoid errors.
Worked example. A flow rate of 951019.4 US gph is 3600 m³/h.
Multiply the value in US gph by 0.003785412 to get m³/h. For example, 10 US gph = 0.03785412 m³/h.
1 US gph equals 0.003785412 m³/h.
Pump and line duties are quoted in m³/h or US gpm; instrument and utility flows often in L/min or ft³/s.