How to convert watt-hours to kilocalories
To convert a measurement in watt-hours to kilocalories, multiply the value by 0.860420650096. The conversion factor comes from the relationship between both units and the joule.
For example, to convert 5 Wh to kilocalories: 5 × 0.860420650096 = 4.302103 kcal.
What is a watt-hour?
A watt-hour is the energy delivered by one watt of power over one hour, equal to 3,600 joules. The watt-hour emerged with the electrical industry as a practical measure of energy use over time. It underpins the kilowatt-hour that appears on electricity bills worldwide.
Common uses of watt-hours include: Battery capacity ratings; Small electronics energy use; Solar panel and storage sizing; Portable power station specifications.
What is a kilocalorie?
A kilocalorie equals 1,000 small calories, or exactly 4,184 joules, and is the 'Calorie' shown on food nutrition labels. The food Calorie (capital C) is actually a kilocalorie. This convention, established in nutrition science, means a 500-Calorie meal contains 500 kilocalories, or about 2,092 kilojoules.
Common uses of kilocalories include: Food energy (the dietary 'Calorie'); Metabolism and exercise burn estimates; Nutrition and diet planning; Bomb-calorimetry food testing.
Watt-hours to kilocalories worked examples
Here are some common values converted:
1 Wh = 0.860420650096 kcal 5 Wh = 4.302103 kcal 10 Wh = 8.604207 kcal 50 Wh = 43.021033 kcal 100 Wh = 86.042065 kcal
Frequently asked questions
How many kilocalories are in one watt-hour?
One watt-hour (Wh) equals 0.860420650096 kilocalories (kcal). Multiply any value in watt-hours by 0.860420650096 to convert to kilocalories.
How do I convert watt-hours to kilocalories?
Multiply the value in watt-hours by 0.860420650096. For example, 5 Wh × 0.860420650096 = 4.302103 kcal.
How do I convert kilocalories to watt-hours?
Multiply the value in kilocalories by 1.162222, or divide by 0.860420650096. Use the swap button on the converter above to reverse the direction.
Is the watt-hour to kilocalorie conversion exact?
The thermochemical calorie is defined as exactly 4.184 J and the BTU as 1055.056 J. Conversions between SI energy units are exact.
What is the formula for watt-hours to kilocalories?
The formula is: kcal = Wh × 0.860420650096. This comes from the definition of both units relative to the joule.