Convert Cubic kilometres per year to Cubic metres per hour
Convert Cubic kilometres per year (km³/yr) to Cubic metres per hour (m³/h) instantly and accurately.
Conversion Formula
m³/h = km³/yr × 114077.1161
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 metres per hour
The cubic metre per hour (m³/h) equals 1/3600 m³/s ≈ 2.778×10⁻⁴ m³/s, the dominant volumetric flow unit in European process engineering, HVAC, and water treatment. Pump datasheet curves, heat-exchanger sizing software, and wastewater-treatment design all use m³/h as the standard. A domestic water pump runs at 3-8 m³/h; a municipal WWTP inlet pump handles 500-5 000 m³/h. 1 m³/h ≈ 2.778×10⁻⁴ m³/s = 1 000 L/h.
Quick Reference Table
| Cubic kilometres per year (km³/yr) | Cubic metres per hour (m³/h) |
|---|---|
| 1 km³/yr | 114077 m³/h |
| 2 km³/yr | 228154 m³/h |
| 5 km³/yr | 570386 m³/h |
| 10 km³/yr | 1140770 m³/h |
| 25 km³/yr | 2851930 m³/h |
| 50 km³/yr | 5703860 m³/h |
| 100 km³/yr | 11407700 m³/h |