Convert UK gallons per minute to Cubic kilometres per year
Convert UK gallons per minute (gpm) to Cubic kilometres per year (km³/yr) instantly and accurately.
Conversion Formula
km³/yr = gpm × 2.391061496e-6
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 Cubic kilometres per year
The cubic kilometre per year (km³/yr) equals 10⁹/(365.25×86400) ≈ 31.688 m³/s, the unit used in global hydrology, glaciology, and climate science for river basin runoff, ice-sheet mass balance, and groundwater storage change. Total global freshwater river runoff is ≈37 000 km³/yr; the Amazon alone contributes ≈6 600 km³/yr; the Greenland ice sheet loses ≈280 km³/yr to melt and calving. 1 km³/yr ≈ 31.69 m³/s.
Quick Reference Table
| UK gallons per minute (gpm) | Cubic kilometres per year (km³/yr) |
|---|---|
| 1 gpm | 2.391 × 10-6 km³/yr |
| 2 gpm | 4.782 × 10-6 km³/yr |
| 5 gpm | 1.196 × 10-5 km³/yr |
| 10 gpm | 2.391 × 10-5 km³/yr |
| 25 gpm | 5.978 × 10-5 km³/yr |
| 50 gpm | 0.000119553 km³/yr |
| 100 gpm | 0.000239106 km³/yr |