Granulated Sugar, or Table Sugar, contains around 4 calories per gram. Hence, a level teaspoon of granulated sugar, which is around 4g of sugar, will contain 16 calories. An average sugar cube, at 6 grams, contains around 25 calories and an average sugar packet from a coffee shop would contain about the same.
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There are about 20 calories in 5 grams of sugar sucrose, as each gram of sugar typically provides around 4 calories of energy.
Ethanol contains about 7 calories per gram.
It requires approximately 540 calories to evaporate 1 gram of boiling water.
When 1 gram of carbohydrate is oxidized, it produces approximately 4 kilocalories (kcal) of energy.
It takes approximately 9 calories to burn 1 gram of fat. This is because fat contains about 9 calories per gram.