What Does 100 Calories Look Like in Grams?
Updated 2026-10-28
Quick answer. About 61 g of cooked chicken breast, 77 g of cooked white rice, 286 g of cooked broccoli or 11 g of olive oil each give about 100 kcal. Divide 10,000 by the calories per 100 g to get the weight of a 100-calorie portion of any food.
A hundred calories is a weight, not a food. The weight depends on how much energy the food carries per gram. Cooked broccoli is mostly water, so 100 kcal needs almost two cups. Olive oil is almost pure fat, so 100 kcal is less than one tablespoon. The table below converts the USDA values this site already uses into the weight of a 100-calorie portion.
How to find the weight of a 100-calorie portion
- Find the calories per 100 g for the food.
- Divide 10,000 by that number. The result is the weight in grams of a 100 kcal portion.
- Divide the weight by the USDA household weight to get cups or tablespoons.
grams for 100 kcal = 10,000 ÷ kcal per 100 g
100 calories in grams and cups
| Food | kcal per 100 g | Weight for 100 kcal | Household measure |
|---|---|---|---|
| Chicken breast, cooked | 165 | 60.6 g | 0.43 cup or 6.89 tbsp |
| White rice, cooked | 130 | 76.9 g | 0.49 cup or 7.77 tbsp |
| Pasta, cooked | 131 | 76.3 g | 0.55 cup or 8.67 tbsp |
| Baked potato | 93 | 107.5 g | 0.62 cup or 9.96 tbsp |
| Broccoli, cooked | 35 | 285.7 g | 1.83 cup or 29.15 tbsp |
| Lentils, cooked | 116 | 86.2 g | 0.44 cup or 6.95 tbsp |
| Black beans, canned | 91 | 109.9 g | 0.43 cup or 6.87 tbsp |
| Banana | 89 | 112.4 g | 0.75 cup |
| Greek yogurt, low-fat plain | 73 | 137.0 g | 0.56 cup or 8.95 tbsp |
| Peanut butter | 598 | 16.7 g | 1.05 tbsp |
| Almonds, sliced | 579 | 17.3 g | 2.54 tbsp |
| Honey | 304 | 32.9 g | 1.54 tbsp |
| Butter, unsalted | 720 | 13.9 g | 0.98 tbsp |
| Olive oil | 900 | 11.1 g | 0.82 tbsp |
Household measures use the cup and tablespoon weights in the same USDA records. They are rounded, and a spooned cup of a dry food can weigh less than a scooped one.
What the table shows
Water is the reason for the spread. Broccoli, potato and cooked rice carry a lot of water, so a 100 kcal portion is large. Oil, butter, peanut butter, nuts and honey carry little water, so a 100 kcal portion is a spoonful. Two plates can look the same size and differ by several hundred calories.
To count a whole plate instead of a single food, list the foods in the meal calorie calculator and read the total. To check one ingredient in a different unit, use the ingredient calorie calculator.
Where the numbers come from
The calorie values are USDA FoodData Central records per 100 g, the same records the calculators on this site use. The household weights are from the same records. The division by 10,000 is arithmetic, so you can repeat every number in the table by hand.
For a portion that is not a round 100 kcal, divide the recipe total by the weight of the finished dish as shown in the calories per serving calculator.
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