Convert Cubic feet per minute to US gallons per second
Convert Cubic feet per minute (ft³/min) to US gallons per second (gal/s) instantly and accurately.
Conversion Formula
gal/s = ft³/min × 0.1246753247
About Cubic feet per minute
The cubic foot per minute (cfm or ft³/min) equals 0.028316846592/60 ≈ 4.719×10⁻⁴ m³/s, the dominant unit for ventilation, HVAC airflow, and compressed-air system design in the US. ASHRAE ventilation standards, building-code fresh-air requirements, and dust-collector capacity are all stated in cfm. A residential HVAC system moves 800-1 200 cfm; an industrial dust collector handles 2 000-20 000 cfm. 1 cfm ≈ 0.4719 L/s.
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 minute (ft³/min) | US gallons per second (gal/s) |
|---|---|
| 1 ft³/min | 0.124675 gal/s |
| 2 ft³/min | 0.249351 gal/s |
| 5 ft³/min | 0.623377 gal/s |
| 10 ft³/min | 1.24675 gal/s |
| 25 ft³/min | 3.11688 gal/s |
| 50 ft³/min | 6.23377 gal/s |
| 100 ft³/min | 12.4675 gal/s |