Convert Cubic kilometres per year to Cubic feet per minute
Convert Cubic kilometres per year (km³/yr) to Cubic feet per minute (ft³/min) instantly and accurately.
Conversion Formula
ft³/min = km³/yr × 67143.25561
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 Cubic feet per minute
The cubic foot per minute (cfm or ft³/min) equals 0.028316846592/60 ≈ 4.719×10⁻⁴ m³/s, the dominant unit for ventilation, HVAC airflow, and compressed-air system design in the US. ASHRAE ventilation standards, building-code fresh-air requirements, and dust-collector capacity are all stated in cfm. A residential HVAC system moves 800-1 200 cfm; an industrial dust collector handles 2 000-20 000 cfm. 1 cfm ≈ 0.4719 L/s.
Quick Reference Table
| Cubic kilometres per year (km³/yr) | Cubic feet per minute (ft³/min) |
|---|---|
| 1 km³/yr | 67143.3 ft³/min |
| 2 km³/yr | 134287 ft³/min |
| 5 km³/yr | 335716 ft³/min |
| 10 km³/yr | 671433 ft³/min |
| 25 km³/yr | 1678580 ft³/min |
| 50 km³/yr | 3357160 ft³/min |
| 100 km³/yr | 6714330 ft³/min |