Wh to kcal Converter

How to convert watt-hours to kilocalories

Formulakcal = Wh × 0.8604206501

Multiply the value in watt-hours by 0.8604206501. To go the other way, multiply by 1.162222222 (or divide by 0.8604206501).

A watt-hour is smaller than a kilocalorie: it takes 1.162222222 watt-hours to make one kilocalorie.

Worked examples

1 watt-hour1 Wh × 0.8604206501 = 0.8604206501 kcal
5 watt-hours5 Wh × 0.8604206501 = 4.30210325 kcal
10 watt-hours10 Wh × 0.8604206501 = 8.604206501 kcal
20 watt-hours20 Wh × 0.8604206501 = 17.208413 kcal
100 watt-hours100 Wh × 0.8604206501 = 86.04206501 kcal

Watt-hours to kilocalories conversion table

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

Watt-hours to kilocalories: 0.1–10 Wh
Watt-hours (Wh)	Kilocalories (kcal)
0.1 Wh	0.086042065 kcal
0.25 Wh	0.21510516 kcal
0.5 Wh	0.43021033 kcal
1 Wh	0.86042065 kcal
2 Wh	1.7208413 kcal
3 Wh	2.581262 kcal
4 Wh	3.4416826 kcal
5 Wh	4.3021033 kcal
6 Wh	5.1625239 kcal
7 Wh	6.0229446 kcal
8 Wh	6.8833652 kcal
9 Wh	7.7437859 kcal
10 Wh	8.6042065 kcal

Watt-hours to kilocalories: 12–1,000 Wh
Watt-hours (Wh)	Kilocalories (kcal)
12 Wh	10.325048 kcal
15 Wh	12.90631 kcal
20 Wh	17.208413 kcal
25 Wh	21.510516 kcal
30 Wh	25.81262 kcal
40 Wh	34.416826 kcal
50 Wh	43.021033 kcal
75 Wh	64.531549 kcal
100 Wh	86.042065 kcal
250 Wh	215.10516 kcal
500 Wh	430.21033 kcal
1,000 Wh	860.42065 kcal

About the units

Watt-hour (Wh)

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

Kilocalorie (kcal)

One thousand small calories, or 4,184 J. The “Calories” on nutrition labels are kilocalories.

Frequently asked questions

How many kilocalories are in one watt-hour?

There are 0.8604206501 kilocalories in one watt-hour, and this value is exact by definition.

How do I convert watt-hours to kilocalories?

Multiply the number of watt-hours by 0.8604206501. For example, 10 Wh × 0.8604206501 = 8.604206501 kcal.

How many watt-hours are in one kilocalorie?

One kilocalorie equals 1.162222222 watt-hours. That is the reverse factor, 1 ÷ 0.8604206501.

What is 10 watt-hours in kilocalories?

10 Wh = 8.604206501 kcal.

Is this Wh to kcal 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.