Convert UK gallons per hour to US gallons per second

Convert UK gallons per hour (gph) to US gallons per second (gal/s) instantly and accurately.

UK gallons per hour (gph)
US gallons per second (gal/s)

Conversion Formula

gal/s = gph × 0.0003335972015

About UK gallons per hour

The UK gallon per hour (gph) equals 4.54609×10⁻³/3600 ≈ 1.263×10⁻⁶ m³/s, found in pre-metric British burner-nozzle ratings, oil-consumption logs for diesel generators, and ship fuel-economy records. British aviation fuel consumption was once published in UK gal/h; legacy Lloyd's Register tanker descriptions used UK gal/h for cargo pump capacities. 1 UK gph ≈ 1.263×10⁻⁶ m³/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

UK gallons per hour (gph)US gallons per second (gal/s)
1 gph0.000333597 gal/s
2 gph0.000667194 gal/s
5 gph0.00166799 gal/s
10 gph0.00333597 gal/s
25 gph0.00833993 gal/s
50 gph0.0166799 gal/s
100 gph0.0333597 gal/s

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