Convert Kilowatt-hours to Calories
1 kilowatt-hour (kWh) equals 860420.6501 calories (cal).
1 kWh = 860420.6501 cal
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilowatt-hour to calorie converter to paste a column from Excel.
How to Convert Kilowatt-hour to Calorie
- 1 kWh = 860420.6501 cal
- 1 cal = 0.000001162222222 kWh
- Example: convert 15 kWh to cal: 15 kWh = 15 × 860420.6501 cal = 12906309.75 cal
Reference conditions. cal: Thermochemical calorie, 4.184 J exactly. The International Table calorie is 4.1868 J.
Formula
cal = kWh × 860420.6500956
Derivation from SI units:
- 1 kWh = 1000 W × 3600 s = 3.6 × 10⁶ J
- 1 cal (thermochemical) = 4.184 J (exact)
- 1 kWh = 3600000 J ÷ 4.184 J per cal = 860420.6500956 cal
Both units are defined exactly, so the factor is exact. Kilowatt-hour definition: kilowatt-hour; Calorie definition: calorie.
Worked examples
- A reading of 10 kWh converts to 8604206.501 cal.
10 kWh × 860420.6501 = 8604206.501 cal - A value of 75 kWh is 64531548.76 cal.
75 kWh × 860420.6501 = 64531548.76 cal
Kilowatt-hour to Calorie conversion table
| Kilowatt-hours (kWh) | Calories (cal) |
|---|---|
| 0.1 kWh | 86042.06501 cal |
| 0.5 kWh | 430210.325 cal |
| 1 kWh | 860420.6501 cal |
| 2 kWh | 1720841.3 cal |
| 5 kWh | 4302103.25 cal |
| 10 kWh | 8604206.501 cal |
| 13.5 kWh | 11615678.78 cal |
| 20 kWh | 17208413 cal |
| 30 kWh | 25812619.5 cal |
| 50 kWh | 43021032.5 cal |
| 75 kWh | 64531548.76 cal |
| 100 kWh | 86042065.01 cal |
| 300 kWh | 258126195 cal |
| 900 kWh | 774378585.1 cal |
| 1000 kWh | 860420650.1 cal |
| 10000 kWh | 8604206501 cal |
Where it's used
Kilowatt-hours are used for electricity bills and meters, while calories appear in chemistry and calorimetry. Both measure energy, work and heat, so the conversion is a fixed factor.
Kilowatt-hour to other energy units
| Conversion | 1 kWh equals |
|---|---|
| kilowatt-hour to joule | 3600000 J |
| kilowatt-hour to kilojoule | 3600 kJ |
| kilowatt-hour to megajoule | 3.6 MJ |
| kilowatt-hour to calorie | 860420.6501 cal |
| kilowatt-hour to kilocalorie | 860.4206501 kcal |
| kilowatt-hour to watt-hour | 1000 Wh |
| kilowatt-hour to BTU | 3412.141633 BTU |
| kilowatt-hour to therm | 0.03412956341 thm |
| kilowatt-hour to electronvolt | 2.246943267 × 10²⁵ eV |
| kilowatt-hour to foot-pound | 2655223.737 ft·lbf |
| kilowatt-hour to erg | 36000000000000 erg |
Frequently asked questions
How many calories are in 1 kilowatt-hour?
1 kWh = 860420.6501 cal.
How do I convert kilowatt-hours to calories?
Multiply the value in kWh by 860420.6501. For example, 15 kWh × 860420.6501 = 12906309.75 cal.
Is the kWh to cal 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
- 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, "kilowatt hour (kW·h)".
- 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 (thermochemical) (cal_th)".
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 Kilowatt-hours to Calories. Retrieved October 17, 2026, from https://scientificconverters.com/energy/kilowatt-hours-to-calories/
IEEE
Scientific Converters, "Convert Kilowatt-hours to Calories," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/energy/kilowatt-hours-to-calories/