A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
Kilocalories to Watt hours
Convert Kilocalorie (kcal) to Watt-hour (Wh) instantly with an exact formula, conversion table, and FAQ.
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Convert kilocalories (kcal) to watt hours (Wh) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Wh = kcal × 1.162222222
Results update instantly for Kilocalories to Watt hours conversions.
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Formula
Wh = kcal × 1.162222222
kcal = Wh × 0.8604206501
Conversion table
| 1 kcal | 1.162222 Wh |
| 5 kcal | 5.811111 Wh |
| 10 kcal | 11.622222 Wh |
| 20 kcal | 23.244444 Wh |
| 50 kcal | 58.111111 Wh |
| 100 kcal | 116.222222 Wh |
| 500 kcal | 581.111111 Wh |
| 1000 kcal | 1162.222222 Wh |
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How the formula works
Both kilocalorie and watt-hour measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in kilocalories by 1.162222222 to get watt hours. To reverse the conversion, multiply a watt-hour value by 0.8604206501 to get back to kilocalories.
Frequently asked questions
What is Kilocalorie (kcal)?
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
What is Watt-hour (Wh)?
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
How do I convert kilocalories to watt hours?
Multiply the kilocalorie value by 1.162222222 to get the equivalent in watt hours. For example, 5 kcal × 1.162222222 = 5.811111 Wh.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.162222222 is an exact, non-rounded value.
Can I convert watt hours back to kilocalories?
Yes. Divide the watt-hour value by 1.162222222, or multiply it by 0.8604206501, to get kilocalories.
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About converting kilocalories to watt hours
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels. A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Use this calculator to move between kilocalories and watt hours accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.