Convert Cubic feet per day to Cubic kilometres per year
Convert Cubic feet per day (ft³/d) to Cubic kilometres per year (km³/yr) instantly and accurately.
Conversion Formula
km³/yr = ft³/d × 1.034272822e-8
About Cubic feet per day
The cubic foot per day (ft³/d) equals 0.028316846592/86400 ≈ 3.277×10⁻⁷ m³/s, found in US oil-and-gas production reports for low-rate gas wells and groundwater monitoring wells. A marginal coalbed-methane well producing 50 Mcf/d (50 000 ft³/d) of gas represents a modest but economic flow; residential water-well yield tests report in ft³/d. 1 ft³/d ≈ 3.277×10⁻⁷ m³/s.
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
| Cubic feet per day (ft³/d) | Cubic kilometres per year (km³/yr) |
|---|---|
| 1 ft³/d | 1.034 × 10-8 km³/yr |
| 2 ft³/d | 2.069 × 10-8 km³/yr |
| 5 ft³/d | 5.171 × 10-8 km³/yr |
| 10 ft³/d | 1.034 × 10-7 km³/yr |
| 25 ft³/d | 2.586 × 10-7 km³/yr |
| 50 ft³/d | 5.171 × 10-7 km³/yr |
| 100 ft³/d | 1.034 × 10-6 km³/yr |