Calories in 6 Oz of Grapefruit
6 oz of grapefruit (170 g) has 71 calories. That is 4% of a 2,000 calorie diet.
The calories come from 1.3 g of protein, 0.2 g of fat and 18 g of carbohydrates, a split of 7% protein, 3% fat and 91% carbs. For comparison, 8 oz of grapefruit has 95 calories. Burning 71 calories takes about 13 minutes of brisk walking or 6 minutes of running for a 155 lb adult, based on Harvard Health Publishing activity estimates.
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Grapefruit calories by serving size
Common amounts of grapefruit with calories and macros. Tap a row for its full nutrition page.
| Serving | Weight | Calories | Protein | Fat | Carbs |
|---|---|---|---|---|---|
| 1/2 cup | 90 g | 38 | 0.7 g | 0.1 g | 9.6 g |
| 100g | 100 g | 42 | 0.8 g | 0.1 g | 11 g |
| 1 half | 154 g | 65 | 1.2 g | 0.2 g | 16 g |
| 6 oz | 170 g | 71 | 1.3 g | 0.2 g | 18 g |
| 1 cup | 180 g | 76 | 1.4 g | 0.3 g | 19 g |
| 200g | 200 g | 84 | 1.5 g | 0.3 g | 21 g |
| 1 grapefruit | 308 g | 129 | 2.4 g | 0.4 g | 33 g |
| 2 halfs | 308 g | 129 | 2.4 g | 0.4 g | 33 g |
| 2 grapefruit | 616 g | 259 | 4.7 g | 0.9 g | 66 g |
Grapefruit vs similar foods
Calories per 100 g compared with other fruits.
Grapefruit: common questions
How many calories are in 6 oz of grapefruit?
6 oz of grapefruit weighs about 170 g and has 71 calories.
How much protein is in 6 oz of grapefruit?
6 oz of grapefruit has 1.3 g of protein, which is 3% of the 50 g Daily Value.
How many carbs are in 6 oz of grapefruit?
6 oz of grapefruit has 18 g of carbohydrates, including 2.7 g of fiber and 12 g of sugars.
How much grapefruit is 100 calories?
100 calories of grapefruit is 238 g, about 3/4 grapefruit.
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Source: USDA FoodData Central, FNDDS 2021-2023. FDC ID 2709165. Original description: Grapefruit, raw. Portion weights are USDA household measures.