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Watt-hours to Kilocalories Converter

Convert watt-hours (Wh) to kilocalories (food Calories) (kcal), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
0.860420650096 kcal
joules (watt-seconds)
3,600 J
kilojoules
3.6 kJ
megajoules
0.0036 MJ
gigajoules
3.6 × 10⁻⁶ GJ
calories (thermochemical)
860.420650096 cal
megacalories
0.000860420650096 Mcal
kilowatt-hours
0.001 kWh
megawatt-hours
1 × 10⁻⁶ MWh
British thermal units (IT)
3.41214163313 Btu
million Btu
3.41214163313 × 10⁻⁶ MMBtu
therms (100,000 Btu)
3.41214163313 × 10⁻⁵ thm
quads (10¹⁵ Btu)
3.41214163313 × 10⁻¹⁵ quad
electronvolts
2.24694326681 × 10²² eV
kiloelectronvolts
2.24694326681 × 10¹⁹ keV
megaelectronvolts
2.24694326681 × 10¹⁶ MeV

1 Wh = 0.860420650096 kcal

Show the working
  1. 1 Wh = 0.860420650096 kcal
  2. 1 × 0.860420650096 = 0.860420650096 kcal

How to convert watt-hours to kilocalories

1 Wh = 0.860420650096 kcal, so multiply by 0.860420650096 to go from watt-hours to kilocalories (food Calories). Going the other way, 1 kcal = 1.16222222222 Wh.

kcal = Wh × 0.860420650096
Wh = kcal × 1.16222222222

Worked example:

1 Wh = 0.860420650096 kcal
5 × 0.860420650096 = 4.30210325048 kcal

Watt-hours to kilocalories table

Watt-hoursKilocalories
1 Wh0.860420650096 kcal
2 Wh1.72084130019 kcal
3 Wh2.58126195029 kcal
4 Wh3.44168260038 kcal
5 Wh4.30210325048 kcal
6 Wh5.16252390057 kcal
7 Wh6.02294455067 kcal
8 Wh6.88336520076 kcal
9 Wh7.74378585086 kcal
10 Wh8.60420650096 kcal
15 Wh12.9063097514 kcal
20 Wh17.2084130019 kcal
25 Wh21.5105162524 kcal
30 Wh25.8126195029 kcal
40 Wh34.4168260038 kcal
50 Wh43.0210325048 kcal
75 Wh64.5315487572 kcal
100 Wh86.0420650096 kcal
250 Wh215.105162524 kcal
500 Wh430.210325048 kcal
1000 Wh860.420650096 kcal

About the units

Kilocalories (kcal)
Kilocalories (food Calories), a specialised unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed