Convert US gallons per day to UK gallons per second
Convert US gallons per day (gpd) to UK gallons per second (gal/s) instantly and accurately.
Conversion Formula
gal/s = gpd × 9.637432692e-6
About US gallons per day
The US gallon per day (gpd) equals 3.785411784×10⁻³/86400 ≈ 4.381×10⁻⁸ m³/s, the standard unit in US water-utility regulation and residential water-well pump sizing. The US national average residential water use is about 80-100 gpd per person; a reverse-osmosis membrane module is rated in gpd (50-100 gpd for domestic units). 1 US gpd ≈ 4.381×10⁻⁸ m³/s.
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 day (gpd) | UK gallons per second (gal/s) |
|---|---|
| 1 gpd | 9.637 × 10-6 gal/s |
| 2 gpd | 1.927 × 10-5 gal/s |
| 5 gpd | 4.819 × 10-5 gal/s |
| 10 gpd | 9.637 × 10-5 gal/s |
| 25 gpd | 0.000240936 gal/s |
| 50 gpd | 0.000481872 gal/s |
| 100 gpd | 0.000963743 gal/s |