How many calories in grapefruit?
Per 100 g, grapefruit provides about 42 kcal. But what matters is your real portion — and its size varies. Here are the reference values, common portions, and an honest range.
55–70 kcal · 1/2 grapefruit1/2 grapefruit (≈ 150 g) ≈ 63 kcal, i.e. a range of 55–70 kcal depending on size. A single to-the-gram number would be misleading.
Nutrition facts per 100 g
Calories per portion
Indicative reference values (e.g. ANSES Ciqual / USDA FoodData Central); real products vary.
Estimate grapefruit from a photo, without weighing
With Volumeal, photograph your plate: grapefruit is identified and its portion estimated, with a confidence range rather than a fake exact number. You can correct the portion in one tap to tighten the estimate.
To set your target, use the calorie calculator. For the full method, see how to count calories from a photo.
See also
Frequently asked questions
How many calories in 1/2 grapefruit?＋
About 63 kcal (1/2 grapefruit, ≈ 150 g), with a range of 55 to 70 kcal depending on real size.
What is the value per 100 g of grapefruit?＋
About 42 kcal per 100 g, with 0.8 g protein, 11 g carbs and 0.1 g fat (reference values).
Do I need to weigh this food?＋
No: photograph your meal with Volumeal and the portion is estimated for you, with a confidence range.