Kilocalorie per Hour (kcal/h)
The kilocalorie per hour (kcal/h) is a heating and cooling power unit used in parts of Europe and Asia. With the International Table calorie it is exactly 1.163 W.
Symbol: kcal/h
Quantity: power (energy per unit time)
SI relation: 1 kcal/h = 1.163 W (exact)
Derivation: 1 kcal_IT/h = 4186.8 J ÷ 3600 s = 1.163 W (exact)
Exact: yes, by definition
Reference conditions. Uses the International Table kilocalorie (4186.8 J), the convention in heating and HVAC: 1 kcal/h = 1.163 W.
Typical uses
- Radiator and boiler ratings in older European data
- Chiller and AC capacity in some Asian markets
- 860 kcal/h ≈ 1 kW
Convert kilocalories per hour to other units
| Conversion | 1 kcal/h equals | Reverse |
|---|---|---|
| kilocalorie per hour to watt | 1.163 W | watt to kilocalorie per hour |
| kilocalorie per hour to kilowatt | 0.001163 kW | kilowatt to kilocalorie per hour |
| kilocalorie per hour to horsepower | 0.00155960869 hp | horsepower to kilocalorie per hour |
| kilocalorie per hour to BTU per hour | 3.968320719 BTU/h | BTU per hour to kilocalorie per hour |
| kilocalorie per hour to refrigeration ton | 0.0003306933933 TR | refrigeration ton to kilocalorie per hour |
| kilocalorie per hour to megawatt | 0.000001163 MW | megawatt to kilocalorie per hour |
| kilocalorie per hour to metric horsepower | 0.001581239941 PS | metric horsepower to kilocalorie per hour |
| kilocalorie per hour to milliwatt | 1163 mW | milliwatt to kilocalorie per hour |
| kilocalorie per hour to foot-pound per second | 0.8577847796 ft·lbf/s | foot-pound per second to kilocalorie per hour |
Open the Power Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "calorie_IT" with hour.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Kilocalorie per Hour (kcal/h). Retrieved October 17, 2026, from https://scientificconverters.com/units/kilocalorie-per-hour/
IEEE
Scientific Converters, "Kilocalorie per Hour (kcal/h)," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/kilocalorie-per-hour/