Foods / Fruits and Fruit Juices

Fruits and Fruit Juices · raw

Grapefruit calories

Grapefruit (raw) has about 42 calories per 100 g and 0.8 g of protein. An estimated serving (123 g) is about 52 kcal.

42kcal per 100 g

About 39% fewer calories per 100 g than the average of the 35 fruits and fruit juices in this list (69 kcal).

Calories per 100 g42 kcal
Protein per 100 g0.8 g
CategoryFruits and Fruit Juices
Formraw
USDA descriptionGrapefruit, raw, pink and red, all areas

Calories by portion

PortionWeightCaloriesWeight basis
1 serving123 g52 kcalApp estimate
1 piece246 g103 kcalApp estimate

Household weights come from the app’s portion table, not necessarily USDA. Rows marked App estimate are estimates; your portion may differ. A serving is not a recommended amount to eat.

Calculate the amount you actually ate

For a measured 150 g of this same food and form: 42 × 150 ÷ 100 = about 63 kcal. Use the per-100-g value with your actual weight; a piece or bowl in the table is only a starting estimate.

Check the USDA description above before choosing a match. Raw, cooked and dry entries are not interchangeable, and a branded or mixed dish may have different ingredients. Missing nutrients are not zero. Read our sources and calculation method.

Log it in seconds. In BiteJot AI you can say or type “grapefruit”, or scan or snap it, then confirm the amount. Calories always come from a database like this one, never from the AI.

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Source: USDA FoodData Central, SR Legacy (FDC ID 174673), public domain. Values are averages and can differ for a specific brand, recipe or cut. Estimates only; not medical advice.