Energy
Calories to Watt-hours
Convert calories to watt-hours instantly.
About this conversion
A calorie (cal) is the energy needed to raise 1 g of water by 1°C. 1 cal = 4.184 J. Watt-hours (Wh) are used for battery capacity and electricity consumption reports. 860.42 calories equal 1 Watt-hours. The converter above calculates the result instantly — you can also swap the units to convert in the other direction.
How to use
Enter a value in the calories field and instantly see the result in watt-hours. Click the swap button to reverse the conversion.
Manual calculation
1 calories = 0.0011622 watt-hours. Example: 10 cal = 0.011622 Wh.
Frequently asked questions
How do you convert calories to watt-hours?
Divide the number of calories by 860.42 to get watt-hours. Example: 1,000 cal ÷ 860.42 = 1.1622 Wh.
Are calories bigger or smaller than watt-hours?
Calories is smaller than Watt-hours. There are 860.42 calories in one watt-hour, so the result is a smaller number when converting from calories to watt-hours.
What is 100 calories in watt-hours?
100 cal equals 0.11622 Wh.
How many calories are in 1 watt-hour?
1 Wh equals 860.42 cal. This is the reverse conversion — useful if you have a value in watt-hours and want it in calories.
What is calorie?
A calorie (cal) is the energy needed to raise 1 g of water by 1°C. 1 cal = 4.184 J.
What is watt-hour used for?
Watt-hours (Wh) are used for battery capacity and electricity consumption reports.