Wh to Calories Converter (Wh to cal)

How to convert watt-hours to calories

Formulacal = Wh × 860.4206501

Multiply the value in watt-hours by 860.4206501. To go the other way, multiply by 0.001162222222 (or divide by 860.4206501).

A watt-hour is larger than a calorie: one watt-hour contains 860.4206501 calories.

Worked examples

1 watt-hour1 Wh × 860.4206501 = 860.4206501 cal
5 watt-hours5 Wh × 860.4206501 = 4,302.10325 cal
10 watt-hours10 Wh × 860.4206501 = 8,604.206501 cal
20 watt-hours20 Wh × 860.4206501 = 17,208.413 cal
100 watt-hours100 Wh × 860.4206501 = 86,042.06501 cal

Watt-hours to calories conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Watt-hours to calories: 0.1–10 Wh
Watt-hours (Wh)	Calories (cal)
0.1 Wh	86.042065 cal
0.25 Wh	215.10516 cal
0.5 Wh	430.21033 cal
1 Wh	860.42065 cal
2 Wh	1,720.8413 cal
3 Wh	2,581.262 cal
4 Wh	3,441.6826 cal
5 Wh	4,302.1033 cal
6 Wh	5,162.5239 cal
7 Wh	6,022.9446 cal
8 Wh	6,883.3652 cal
9 Wh	7,743.7859 cal
10 Wh	8,604.2065 cal

Watt-hours to calories: 12–1,000 Wh
Watt-hours (Wh)	Calories (cal)
12 Wh	10,325.048 cal
15 Wh	12,906.31 cal
20 Wh	17,208.413 cal
25 Wh	21,510.516 cal
30 Wh	25,812.62 cal
40 Wh	34,416.826 cal
50 Wh	43,021.033 cal
75 Wh	64,531.549 cal
100 Wh	86,042.065 cal
250 Wh	215,105.16 cal
500 Wh	430,210.33 cal
1,000 Wh	860,420.65 cal

About the units

Watt-hour (Wh)

One watt sustained for an hour: 3,600 J. Battery capacities are rated in Wh.

Calorie (cal)

The “small” calorie: exactly 4.184 J (thermochemical definition), roughly the energy to heat one gram of water by 1 °C.

Frequently asked questions

How many calories are in one watt-hour?

There are 860.4206501 calories in one watt-hour, and this value is exact by definition.

How do I convert watt-hours to calories?

Multiply the number of watt-hours by 860.4206501. For example, 10 Wh × 860.4206501 = 8,604.206501 cal.

How many watt-hours are in one calorie?

One calorie equals 0.001162222222 watt-hours. That is the reverse factor, 1 ÷ 860.4206501.

What is 10 watt-hours in calories?

10 Wh = 8,604.206501 cal.

Is this Wh to cal converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Wh to Calories Converter