Convert Kilocalories per Hour to Kilowatts (kcal/h to kW)
1 kilocalorie per hour (kcal/h) equals 0.001163 kilowatts (kW).
1 kcal/h = 0.001163 kW
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilocalorie per hour to kilowatt converter to paste a column from Excel.
How to Convert Kilocalorie per Hour to Kilowatt
- 1 kcal/h = 0.001163 kW
- 1 kW = 859.8452279 kcal/h
- Example: convert 20000 kcal/h to kW: 20000 kcal/h = 20000 × 0.001163 kW = 23.26 kW
Reference conditions. kcal/h: Uses the International Table kilocalorie (4186.8 J), the convention in heating and HVAC: 1 kcal/h = 1.163 W.
Formula
kW = kcal/h × 0.001163
or kW = kcal/h ÷ 859.845227859
Derivation from SI units:
- 1 kcal_IT/h = 4186.8 J ÷ 3600 s = 1.163 W (exact)
- 1 kW = 10³ W
- 1 kcal/h = 1.163 W ÷ 1000 W per kW = 0.001163 kW
Both units are defined exactly, so the factor is exact. Kilocalorie per Hour definition: kilocalorie per hour; Kilowatt definition: kilowatt.
Worked examples
- A 1000 kcal/h heat output is 1.163 kW.
1000 kcal/h × 0.001163 = 1.163 kW - A 20000 kcal/h boiler is 23.26 kW.
20000 kcal/h × 0.001163 = 23.26 kW
Kilocalorie per Hour to Kilowatt conversion table
| Kilocalories per Hour (kcal/h) | Kilowatts (kW) |
|---|---|
| 100 kcal/h | 0.1163 kW |
| 500 kcal/h | 0.5815 kW |
| 860 kcal/h | 1.00018 kW |
| 1000 kcal/h | 1.163 kW |
| 2000 kcal/h | 2.326 kW |
| 5000 kcal/h | 5.815 kW |
| 10000 kcal/h | 11.63 kW |
| 20000 kcal/h | 23.26 kW |
| 50000 kcal/h | 58.15 kW |
Where it's used
Heating and cooling capacities in kcal/h, common on European and Asian equipment, are converted to kilowatts. 1 kcal/h is 1.163 W (International Table kilocalorie).
Kilocalorie per Hour to other power units
| Conversion | 1 kcal/h equals |
|---|---|
| kilocalorie per hour to watt | 1.163 W |
| kilocalorie per hour to milliwatt | 1163 mW |
| kilocalorie per hour to kilowatt | 0.001163 kW |
| kilocalorie per hour to megawatt | 0.000001163 MW |
| kilocalorie per hour to horsepower | 0.00155960869 hp |
| kilocalorie per hour to metric horsepower | 0.001581239941 PS |
| kilocalorie per hour to BTU per hour | 3.968320719 BTU/h |
| kilocalorie per hour to refrigeration ton | 0.0003306933933 TR |
| kilocalorie per hour to foot-pound per second | 0.8577847796 ft·lbf/s |
Frequently asked questions
How many kW is 1000 kcal/h?
1000 kcal/h = 1.163 kW.
How many kilowatts are in 1 kilocalorie per hour?
1 kcal/h = 0.001163 kW.
How do I convert kilocalories per hour to kilowatts?
Multiply the value in kcal/h by 0.001163, or divide it by 859.8452279. For example, 20000 kcal/h × 0.001163 = 23.26 kW.
Is the kcal/h to kW conversion exact?
Yes. Both units are defined exactly, and 1 kcal/h is exactly 0.001163 kW.
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.
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
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). Convert Kilocalories per Hour to Kilowatts (kcal/h to kW). Retrieved October 18, 2026, from https://scientificconverters.com/power/kilocalories-per-hour-to-kilowatts/
IEEE
Scientific Converters, "Convert Kilocalories per Hour to Kilowatts (kcal/h to kW)," scientificconverters.com. Accessed: Oct. 18, 2026. [Online]. Available: https://scientificconverters.com/power/kilocalories-per-hour-to-kilowatts/