What is a calorie?
A calorie is a unit of energy. On food labels and menus, "calorie" means a kilocalorie (kcal), the energy your body gets from food and drink.
Quick facts
| 1 food calorie | 1 kcal, or 4.184 kilojoules |
|---|---|
| Protein | 4 calories per gram |
| Carbohydrates | 4 calories per gram |
| Fat | 9 calories per gram |
| Alcohol | 7 calories per gram |
Calorie calculator
Find how many calories a day you need to lose, maintain or gain weight.
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What does it mean?
Food energy comes from protein, carbohydrates, fat and alcohol. Each gram gives a set number of calories, so a meal's total is roughly the sum of its macros.
How many calories you need depends on your body and how active you are. Your TDEE is the usual starting point.
How does it show up when you order food?
Big chains publish calories for every item in their nutrition guides. Swiss Chalet's white meat Quarter Chicken Dinner is 540 calories, for example.
Calories on a menu are for the item as listed. Sauces, sides and drinks usually add more.