Convert UK gallons per minute to US gallons per second
Convert UK gallons per minute (gpm) to US gallons per second (gal/s) instantly and accurately.
Conversion Formula
gal/s = gpm × 0.02001583209
About UK gallons per minute
The UK (imperial) gallon per minute (gpm) equals 4.54609×10⁻³/60 ≈ 7.577×10⁻⁵ m³/s, historically used in British plumbing design, pump curves, and water-treatment plant sizing. Pre-metric UK water-industry capacity tables and pump manufacturers quoted flows in UK gal/min; legacy British Standard BS EN pump curves often show both units. 1 UK gpm ≈ 7.577×10⁻⁵ m³/s ≈ 4.546 L/min.
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
| UK gallons per minute (gpm) | US gallons per second (gal/s) |
|---|---|
| 1 gpm | 0.0200158 gal/s |
| 2 gpm | 0.0400317 gal/s |
| 5 gpm | 0.100079 gal/s |
| 10 gpm | 0.200158 gal/s |
| 25 gpm | 0.500396 gal/s |
| 50 gpm | 1.00079 gal/s |
| 100 gpm | 2.00158 gal/s |