Volumetric flow
Convert cubic foot per minute (ft³/min) to US gallon per minute (US gpm). 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 ft³/min = 7.480519 US gpm
To convert cubic foot per minute to US gallon per minute, multiply the ft³/min value by 7.480519. To go the other way, divide by 7.480519 (or multiply by 0.1336806).
| ft³/min | US gpm |
|---|---|
| 1 | 7.480519 |
| 2 | 14.96104 |
| 5 | 37.4026 |
| 10 | 74.80519 |
| 25 | 187.013 |
| 50 | 374.026 |
| 100 | 748.0519 |
| 250 | 1870.13 |
| 500 | 3740.26 |
| 1000 | 7480.519 |
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 2118.88 ft³/min is 15850.32 US gpm.
Multiply the value in ft³/min by 7.480519 to get US gpm. For example, 10 ft³/min = 74.80519 US gpm.
1 ft³/min equals 7.480519 US gpm.
Pump and line duties are quoted in m³/h or US gpm; instrument and utility flows often in L/min or ft³/s.