Skip to content
RK Calculator
Menu

Watt-hours to Calories Converter

Convert watt-hours (Wh) to calories (thermochemical) (cal), 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
860.420650096 cal
joules (watt-seconds)
3,600 J
kilojoules
3.6 kJ
megajoules
0.0036 MJ
gigajoules
3.6 × 10⁻⁶ GJ
kilocalories (food Calories)
0.860420650096 kcal
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 = 860.420650096 cal

Show the working
  1. 1 Wh = 860.420650096 cal
  2. 1 × 860.420650096 = 860.420650096 cal

How to convert watt-hours to calories

1 Wh = 860.420650096 cal, so multiply by 860.420650096 to go from watt-hours to calories (thermochemical). Going the other way, 1 cal = 0.00116222222222 Wh.

cal = Wh × 860.420650096
Wh = cal × 0.00116222222222

Worked example:

1 Wh = 860.420650096 cal
5 × 860.420650096 = 4302.10325048 cal

Watt-hours to calories table

Watt-hoursCalories
1 Wh860.420650096 cal
2 Wh1,720.84130019 cal
3 Wh2,581.26195029 cal
4 Wh3,441.68260038 cal
5 Wh4,302.10325048 cal
6 Wh5,162.52390057 cal
7 Wh6,022.94455067 cal
8 Wh6,883.36520076 cal
9 Wh7,743.78585086 cal
10 Wh8,604.20650096 cal
15 Wh12,906.3097514 cal
20 Wh17,208.4130019 cal
25 Wh21,510.5162524 cal
30 Wh25,812.6195029 cal
40 Wh34,416.8260038 cal
50 Wh43,021.0325048 cal
75 Wh64,531.5487572 cal
100 Wh86,042.0650096 cal
250 Wh215,105.162524 cal
500 Wh430,210.325048 cal
1000 Wh860,420.650096 cal

About the units

Calories (cal)
Calories (thermochemical), a specialised unit. The thermochemical calorie, 4.184 J, used on US food labels as 1 Calorie = 1 kilocalorie. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed