How many kilocalories are there in one kilogram of butter?
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Answer
About 7,200 kcal
Butter is only about 80 percent fat. The rest is mostly water, which is why it spits when it hits a hot pan.
How to estimate it
Almost all the energy in butter comes from fat, and fat delivers 9 kcal per gram, against 4 for sugar or protein. Butter is about four fifths fat, so 1 kg contains 800 grams of it. 800 × 9 = 7,200 kcal, roughly three days of food for an adult. Nutrition tables agree: about 7,200 kcal per kilogram.
Source: USDA FoodData Central
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