Convert 21 Kilojoules to Calories
How much energy is 21 kilojoules? How many nutritional calories are in 21 kilojoules? 21 kJ to kcal conversion.
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21 Kilojoules ≈
5.0191205 Nutritional Calories
result rounded
Decimal places
Result in Plain English
21 kilojoules is equal to about 5.02 Calories.
Result as a Fraction
21 kilojoules
= 2,625⁄523 Calories
= 5 and 10⁄523 Calories
In Scientific Notation
21 kilojoules
= 2.1 x 101 kilojoules
≈ 5.01912 x 100 Calories
Kilojoules
A kilojoule is 1,000 joules. In some countries, food is labeled in kilojoules, much like kilocalories are used in the United States.
Calories
A nutritional Calorie, or kilocalorie, is commonly used in food labeling. It is equal to 4.184 kilojoules. The average American consumes about 2,700 kilocalories per day.