Convert Cubic feet per second to US gallons per second
Convert Cubic feet per second (ft³/s) to US gallons per second (gal/s) instantly and accurately.
Conversion Formula
gal/s = ft³/s × 7.480519481
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 second
The US gallon per second (gal/s) equals 3.785411784×10⁻³ m³/s, used for very large pump discharge rates and fire-suppression deluge systems. A large centrifugal fire pump rated 1 500 US gal/min delivers exactly 25 US gal/s; industrial cooling-tower makeup lines are sized in gal/s at peak demand. 1 US gal/s = 3.785411784×10⁻³ m³/s = 60 US gal/min ≈ 227.1 L/min.
Quick Reference Table
| Cubic feet per second (ft³/s) | US gallons per second (gal/s) |
|---|---|
| 1 ft³/s | 7.48052 gal/s |
| 2 ft³/s | 14.961 gal/s |
| 5 ft³/s | 37.4026 gal/s |
| 10 ft³/s | 74.8052 gal/s |
| 25 ft³/s | 187.013 gal/s |
| 50 ft³/s | 374.026 gal/s |
| 100 ft³/s | 748.052 gal/s |