Convert US gallons per minute to Cubic feet per second
Convert US gallons per minute (gpm) to Cubic feet per second (ft³/s) instantly and accurately.
Conversion Formula
ft³/s = gpm × 0.002228009259
About US gallons per minute
The US gallon per minute (gpm) equals 3.785411784×10⁻³/60 ≈ 6.309×10⁻⁵ m³/s, the dominant volumetric flow unit in US plumbing, HVAC, and water-treatment industries. EPA showerhead standards are set at 2.5 gpm; residential water meters size at 3/4"-1" for 5-20 gpm; municipal water-distribution design uses hundreds to thousands of gpm. 1 gpm ≈ 6.309×10⁻⁵ m³/s = 3.785 L/min.
About Cubic feet per second
The cubic foot per second (ft³/s or cfs) equals 0.028316846592 m³/s, the primary unit for measuring river discharge and open-channel flow in the United States. The US Geological Survey publishes all streamflow data in cfs; irrigation water rights, flood-control gates, and dam spillway capacities are specified in cfs. The Colorado River at full natural flow is ≈22 000 cfs. 1 cfs = 0.028316846592 m³/s ≈ 28.317 L/s ≈ 448.8 US gpm.
Quick Reference Table
| US gallons per minute (gpm) | Cubic feet per second (ft³/s) |
|---|---|
| 1 gpm | 0.00222801 ft³/s |
| 2 gpm | 0.00445602 ft³/s |
| 5 gpm | 0.01114 ft³/s |
| 10 gpm | 0.0222801 ft³/s |
| 25 gpm | 0.0557002 ft³/s |
| 50 gpm | 0.1114 ft³/s |
| 100 gpm | 0.222801 ft³/s |