Calories in Grapefruit
Grapefruit contains 42 kcal per 100 g. A typical serving — 1/2 grapefruit (120 g) — carries about 50 kcal.
A low-calorie citrus; note it interacts with certain medications.
Nutrition facts
| Nutrient | Per 100 g | Per serving — 1/2 grapefruit (120 g) |
|---|---|---|
| Calories | 42 kcal | 50 kcal |
| Protein | 0.8 g | 1 g |
| Fat | 0.1 g | 0.1 g |
| Carbohydrates | 11 g | 13 g |
| Fibre | 1.6 g | 1.9 g |
| Sugars | 7 g | 8.4 g |
How much exercise burns one serving?
~13 minutes
~5 minutes
Approximate, for a ~50 kcal serving and a ~70 kg adult (walking ~4 kcal/min, running ~10 kcal/min).
Frequently asked questions
How many calories are in grapefruit?
Grapefruit contains 42 kcal per 100 g. A typical serving — 1/2 grapefruit (120 g) — carries about 50 kcal.
How much protein, fat and carbohydrate does grapefruit have?
Per 100 g: 0.8 g protein, 0.1 g fat and 11 g carbohydrates, of which 1.6 g fibre and 7 g sugars.
Is grapefruit suitable for a diet?
Yes — at 42 kcal per 100 g, grapefruit is a low-calorie food that fits easily into a weight-loss plan. A low-calorie citrus; note it interacts with certain medications.
How much does one serving of grapefruit weigh?
The typical serving is 1/2 grapefruit (120 g) — about 120 g, which equals ~50 kcal.
How much exercise burns one serving of grapefruit?
Roughly 13 minutes of brisk walking or 5 minutes of running (approximate, for a ~70 kg adult: walking ~4 kcal/min, running ~10 kcal/min).
More from “Fruits”
Values are rounded average reference figures per 100 g/ml (USDA FoodData Central and European food-composition tables). Real values vary with variety, recipe and preparation — the label of a specific product always takes precedence. This information is not medical or dietary advice.