Convert Cubic kilometres per year to US gallons per second
Convert Cubic kilometres per year (km³/yr) to US gallons per second (gal/s) instantly and accurately.
Conversion Formula
gal/s = km³/yr × 8371.107193
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.
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
| Cubic kilometres per year (km³/yr) | US gallons per second (gal/s) |
|---|---|
| 1 km³/yr | 8371.11 gal/s |
| 2 km³/yr | 16742.2 gal/s |
| 5 km³/yr | 41855.5 gal/s |
| 10 km³/yr | 83711.1 gal/s |
| 25 km³/yr | 209278 gal/s |
| 50 km³/yr | 418555 gal/s |
| 100 km³/yr | 837111 gal/s |