Convert Kilowatts to Kilocalories per Hour
1 kilowatt (kW) equals 859.8452279 kilocalories per hour (kcal/h).
1 kW = 859.8452279 kcal/h
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilowatt to kilocalorie per hour converter to paste a column from Excel.
How to Convert Kilowatt to Kilocalorie per Hour
- 1 kW = 859.8452279 kcal/h
- 1 kcal/h = 0.001163 kW
- Example: convert 15 kW to kcal/h: 15 kW = 15 × 859.8452279 kcal/h = 12897.67842 kcal/h
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
kcal/h = kW × 859.845227859
Derivation from SI units:
- 1 kW = 10³ W
- 1 kcal_IT/h = 4186.8 J ÷ 3600 s = 1.163 W (exact)
- 1 kW = 1000 W ÷ 1.163 W per kcal/h = 859.845227859 kcal/h
Both units are defined exactly, so the factor is exact. Kilowatt definition: kilowatt; Kilocalorie per Hour definition: kilocalorie per hour.
Worked examples
- A reading of 3.5 kW converts to 3009.458298 kcal/h.
3.5 kW × 859.8452279 = 3009.458298 kcal/h - A value of 22 kW is 18916.59501 kcal/h.
22 kW × 859.8452279 = 18916.59501 kcal/h
Kilowatt to Kilocalorie per Hour conversion table
| Kilowatts (kW) | Kilocalories per Hour (kcal/h) |
|---|---|
| 0.5 kW | 429.9226139 kcal/h |
| 0.75 kW | 644.8839209 kcal/h |
| 1 kW | 859.8452279 kcal/h |
| 1.5 kW | 1289.767842 kcal/h |
| 2.2 kW | 1891.659501 kcal/h |
| 3 kW | 2579.535684 kcal/h |
| 3.5 kW | 3009.458298 kcal/h |
| 5 kW | 4299.226139 kcal/h |
| 7.5 kW | 6448.839209 kcal/h |
| 10 kW | 8598.452279 kcal/h |
| 11 kW | 9458.297506 kcal/h |
| 15 kW | 12897.67842 kcal/h |
| 22 kW | 18916.59501 kcal/h |
| 37 kW | 31814.27343 kcal/h |
| 50 kW | 42992.26139 kcal/h |
| 75 kW | 64488.39209 kcal/h |
| 100 kW | 85984.52279 kcal/h |
| 150 kW | 128976.7842 kcal/h |
| 250 kW | 214961.307 kcal/h |
Where it's used
Kilowatts are used for engine and motor power (1 kW ≈ 1.34 hp), while kilocalories per hour appear in radiator and boiler ratings in older European data. Both measure power (energy per unit time), so the conversion is a fixed factor.
Kilowatt to other power units
| Conversion | 1 kW equals |
|---|---|
| kilowatt to watt | 1000 W |
| kilowatt to milliwatt | 1000000 mW |
| kilowatt to megawatt | 0.001 MW |
| kilowatt to horsepower | 1.34102209 hp |
| kilowatt to metric horsepower | 1.359621617 PS |
| kilowatt to BTU per hour | 3412.141633 BTU/h |
| kilowatt to refrigeration ton | 0.2843451361 TR |
| kilowatt to kilocalorie per hour | 859.8452279 kcal/h |
| kilowatt to foot-pound per second | 737.5621493 ft·lbf/s |
Frequently asked questions
How many kilocalories per hour are in 1 kilowatt?
1 kW = 859.8452279 kcal/h.
How do I convert kilowatts to kilocalories per hour?
Multiply the value in kW by 859.8452279. For example, 15 kW × 859.8452279 = 12897.67842 kcal/h.
Is the kW to kcal/h conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
- 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). Convert Kilowatts to Kilocalories per Hour. Retrieved October 17, 2026, from https://scientificconverters.com/power/kilowatts-to-kilocalories-per-hour/
IEEE
Scientific Converters, "Convert Kilowatts to Kilocalories per Hour," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/power/kilowatts-to-kilocalories-per-hour/