Calories in Grapefruit: Per 100 g, Per Serving & Nutrition Facts
How many calories in grapefruit: per 100 g and per serving
| Nutrient | Per 100 g | Serving: half, 150 g |
|---|---|---|
| Calories | 42 kcal | 63 kcal |
| Energy (kilojoules) | 176 kJ | 264 kJ |
| Protein | 0.8 g | 1.2 g |
| Fat | 0.1 g | 0.2 g |
| incl. saturated | 0 g | 0 g |
| Total carbohydrates | 11 g | 16 g |
| incl. sugars | 7 g | 11 g |
| incl. fiber | 1.6 g | 2.4 g |
| Salt | 0 g | 0 g |
*Where the numbers come from
Values per 100 g as eaten, averaged from food composition tables (USDA FoodData Central and others) and rounded — a specific brand or recipe will differ a little. Carbohydrates are total carbohydrate, fiber included, as on a US Nutrition Facts label.
42 kcal (176 kJ) per 100 g · P/F/C 0.8/0.1/11 g
Serving (half, 150 g) — 63 kcal (264 kJ) · Nutri-Score A
Per 100 g: sugar: medium saturated fat: low salt: low fiber: low
Is grapefruit healthy?
Yes. On its nutrient profile, grapefruit is a healthy choice: grade A on the open 2023 Nutri-Score algorithm, the top grade.
For
- Low in calories: 42 kcal per 100 g, so a serving (half, 150 g) is 63 kcal.
- Counts toward your fruit and vegetables: a 150 g serving is 38% of the 400 g a day the WHO advises.
A typical serving (half, 150 g) has 63 kcal, 1.2 g protein, 0.2 g fat and 16 g carbs. Other weights in the table.
How we judge this, and the sources
The answer comes from the food's composition, not from opinion: its Nutri-Score grade on the open 2023 algorithm, a traffic light for sugar, salt, saturated fat and fiber per 100 g, and the share of daily reference amounts in a typical serving (for salt, sugar, fiber and vegetables, those of the WHO). It rates the food's nutrient profile; it is not medical advice. Formulas, thresholds and every source are on the methodology page; last checked against the sources on November 1, 2026. The short food description was written by our language model (AI) — how we check the text.
More about this food
Grapefruit is a vitamin C-rich citrus with a bitter edge. It interacts with some medications, so check the leaflet if you take any regularly.
protein 8%fat 2%carbs 90%
Vitamins and minerals in grapefruit
Per 100 g, the standouts are vitamin C — 31 mg, 35% of the Daily Value.
| Nutrient | Per 100 g | Serving: half, 150 g | % DV |
|---|---|---|---|
| Vitamin A | 58 mcg | 87 mcg | 10% |
| Vitamin C | 31 mg | 47 mg | 52% |
| Thiamin (B1) | 0.04 mg | 0.06 mg | 5% |
| Riboflavin (B2) | 0.03 mg | 0.05 mg | 4% |
| Vitamin B6 | 0.05 mg | 0.08 mg | 5% |
| Folate (B9) | 13 mcg | 20 mcg | 5% |
| Potassium | 135 mg | 203 mg | 4% |
| Magnesium | 9 mg | 14 mg | 3% |
| Copper | 0.03 mg | 0.05 mg | 5% |
*Where the vitamin numbers come from
Vitamins and minerals come from the USDA FoodData Central record “Grapefruit, raw, pink and red, all areas” (FDC ID 174673, SR Legacy; public domain), checked October 14, 2026; the record was matched to this food by calories, protein and fat. % DV is per serving, against the FDA Daily Values used on Nutrition Facts labels (2,000-calorie diet). The table lists nutrients that reach at least 2% DV per 100 g; the rest are absent or trace. Varieties, seasons and brands differ, and cooking in water leaches some vitamin C and B vitamins.
Grapefruit calories by weight, 50–300 g
150 g of grapefruit has 63 calories and 200 g has 84. The table gives protein, fat and carbs for each weight; for any other amount, type your own into the calculator below.
| Weight | Kcal | P / F / C, g | Fiber, g |
|---|---|---|---|
| 50 g | 21 | 0.4 / 0.1 / 5.4 | 0.8 |
| 100 g | 42 | 0.8 / 0.1 / 11 | 1.6 |
| 150 g — typical serving | 63 | 1.2 / 0.2 / 16 | 2.4 |
| 200 g | 84 | 1.6 / 0.2 / 21 | 3.2 |
| 250 g | 105 | 2 / 0.3 / 27 | 4 |
| 300 g | 126 | 2.4 / 0.3 / 32 | 4.8 |
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Grapefruit: more nutrition highlights
It has 2.4 g of fiber per serving — roughly 10% of the 25 g a day most adults fall short of.
How much movement is one serving?
A serving (half, 150 g) is 63 kcal — roughly 21 min of easy walking or 8 min of cycling for a 70 kg (154 lb) person. In the diary, minutes are worked out for your weight and the activities you actually do.
Grapefruit: swaps and alternatives
No need to swap: grapefruit already gets grade A, the top of the scale, and nothing is in the red on the per-100 g traffic light: sugar 7 g (red is over 22.5 g), saturated fat 0 g (over 5 g) and salt 0 g (over 1.5 g). We only suggest a swap when it fixes a real problem. How we pick swaps.
Equally good alternatives
Same food group and the same place on the plate, with a Nutri-Score grade at least as good. Figures are for 150 g, a typical serving of grapefruit.
| Food | Grade | Kcal | Protein, g | Fiber, g |
|---|---|---|---|---|
| Grapefruit | A | 63 | 1.2 | 2.4 |
| Asian Pears | A | 63 | 0.8 | 5.4 |
| Papaya | A | 65 | 0.8 | 2.6 |
| Nectarines | A | 66 | 1.7 | 2.6 |
Grapefruit vs similar foods: calories compared
| Per 100 g | Kcal | P / F / C, g |
|---|---|---|
| Peaches | 39 | 0.9 / 0.3 / 10 |
| Grapefruit | 42 | 0.8 / 0.1 / 11 |
| Raspberries | 46 | 0.8 / 0.5 / 12 |
| Apricots | 46 | 1.4 / 0.4 / 11 |
| Plums | 46 | 0.7 / 0.3 / 11 |
| Orange | 47 | 0.9 / 0.1 / 12 |
| Clementines | 47 | 0.9 / 0.2 / 12 |
FAQ
How many calories are in 100 g of grapefruit?
100 g of grapefruit has 42 calories, with 0.8 g protein, 0.1 g fat and 11 g carbohydrates (1.6 g fiber).
How many calories are in a serving of grapefruit?
A serving (half, 150 g) has 63 calories: 1.2 g protein, 0.2 g fat and 16 g carbs.
What are the macros of grapefruit?
Per 100 g: 0.8 g protein, 11 g carbs and 0.1 g fat. By calories that's about 8% protein, 90% carbs and 2% fat.
How long do you have to walk to burn a serving of grapefruit?
About 21 min of easy walking or 8 min of cycling for a 70 kg (154 lb) person — that's the 63 calories in a serving (half, 150 g).
What vitamins and minerals are in grapefruit?
Per 100 g, grapefruit is richest in vitamin C (31 mg, 35% DV) — from USDA FoodData Central record 174673.
How much fiber is in grapefruit?
100 g of grapefruit has 1.6 g of fiber; a serving (half, 150 g) has 2.4 g — 10% of the 25 g a day the WHO recommends.
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