Convert Cubic feet per second to US gallons per minute
Convert Cubic feet per second (ft³/s) to US gallons per minute (gpm) instantly and accurately.
Conversion Formula
gpm = ft³/s × 448.8311688
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.
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.
Quick Reference Table
| Cubic feet per second (ft³/s) | US gallons per minute (gpm) |
|---|---|
| 1 ft³/s | 448.831 gpm |
| 2 ft³/s | 897.662 gpm |
| 5 ft³/s | 2244.16 gpm |
| 10 ft³/s | 4488.31 gpm |
| 25 ft³/s | 11220.8 gpm |
| 50 ft³/s | 22441.6 gpm |
| 100 ft³/s | 44883.1 gpm |