Convert US gallons per minute to UK gallons per second
Convert US gallons per minute (gpm) to UK gallons per second (gal/s) instantly and accurately.
Conversion Formula
gal/s = gpm × 0.01387790308
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 UK gallons per second
The UK (imperial) gallon per second (gal/s) equals 4.54609×10⁻³ m³/s, about 20% larger than the US gallon per second. It appears in pre-metric British fire-fighting standards, large pump test certificates, and naval engineering calculations. A UK fire engine pump rated 1 000 UK gal/min delivers ≈16.67 UK gal/s. 1 UK gal/s = 4.54609×10⁻³ m³/s ≈ 1.201 US gal/s.
Quick Reference Table
| US gallons per minute (gpm) | UK gallons per second (gal/s) |
|---|---|
| 1 gpm | 0.0138779 gal/s |
| 2 gpm | 0.0277558 gal/s |
| 5 gpm | 0.0693895 gal/s |
| 10 gpm | 0.138779 gal/s |
| 25 gpm | 0.346948 gal/s |
| 50 gpm | 0.693895 gal/s |
| 100 gpm | 1.38779 gal/s |