Grapefruit nutrition: calories, carbs, GI, protein, fiber, fats
Carbohydrates in Grapefruit
Carbohydrates per 100g
A 100g red grapefruit comprises over 10% carbohydrates, containing 10.66g of carbs.
White grapefruit is lower in carbohydrates, containing 2g fewer carbs in the same serving size.
Grapefruit segments canned in juice contain more carbs than white grapefruits but fewer carbs than red ones.
Carbohydrates per Serving Size
The average serving size of grapefruits that a person eats in one sitting is 154g or half a medium-sized grapefruit.
One average serving size of red and pink grapefruit contains 16.4g of carbs.
Since we consider the average serving size to be the same for different kinds of grapefruits, the comparison results will naturally stay the same.
The carbohydrate content of red grapefruit consists of 65% sugars, 15% fiber, and 20% other carbohydrates. In other words, red grapefruit contains 6.89g of sugars, 1.6g of fiber, and 2.17g of other carbohydrates.
The primary sugar in grapefruit is sucrose, making up more than half of the sugar content. The other two sugars in this fruit are glucose and fructose, in similar amounts.
Carbohydrate type breakdown
White grapefruit has a similar carbohydrate composition. However, grapefruit segments canned in juice are much lower in fiber, containing only 4% or 0.04g fiber.
100g serving of grapefruit contains 9.06g of net carbs. Of this, 6.89g are made up of sugars, and the rest consists of other carbohydrates.
Soluble and Insoluble Fiber
The fiber content in grapefruit consists of 75% soluble (1.2g) and 25% insoluble fiber (0.4g) (1).
Soluble fiber slows down and improves digestion, while insoluble fiber helps with constipation.
Fiber content ratio for Grapefruit
Calories in Grapefruit
A 100g serving of red grapefruit provides 42 calories. This means that one average serving size, or half a grapefruit, contains 65 calories.
White grapefruit and grapefruit segments canned in juice are relatively lower in calories.
A 100g serving size of grapefruits provides only 2% of your daily calorie intake needs.
Comparison to Other Fruits
Grapefruit is often compared to other popular citrus fruits, such as orange. To read more about this, visit our “Grapefruit vs. Orange” full comparison page.
In the table below, you can look at how grapefruits compare to other fruits regarding calorie content.
|Food||Calories per serving||Calories per 100g|
|Pomelo||72 (1 cup, 190g)||38|
|Orange||62 (1 fruit, 131g)||47|
|Grape||62 (1 cup, 92g)||67|
|Mandarin Orange||58 (109g)||53|
Using a method called Met or Metabolic Equivalent of a Task, we have calculated how much physical activity will burn the number of calories (65 cal) provided by one average serving size of a grapefruit (2, 3).
|60kg person||80kg person||100kg person|
|Walking||19 min||14 min||11 min|
|Running||6 min||5 min||4 min|
|Cycling||9 min||7 min||6 min|
|Dancing||9 min||7 min||6 min|
Important nutritional characteristics for Grapefruit
Glycemic index ⓘ
Check out our Glycemic index chart page for the full list.
|Glycemic load||3 (low)|
|Calories ⓘ Calories per 100-gram serving||42|
|Net Carbs ⓘ Net Carbs = Total Carbohydrates – Fiber – Sugar Alcohols||9.06 grams|
|Serving Size ⓘ Serving sizes are taken from FDA's Reference Amounts Customarily Consumed (RACCs)||1 NLEA serving (154 grams)|
|Acidity (Based on PRAL) ⓘ PRAL (Potential renal acid load) is calculated using a formula. On the PRAL scale the higher the positive value, the more is the acidifying effect on the body. The lower the negative value, the higher the alkalinity of the food. 0 is neutral.||-2.3 (alkaline)|
Grapefruit calories (kcal)
|Calories in 100 grams||42|
|Calories in 1 cup sections, with juice||97||230 g|
|Calories in 1 NLEA serving||65||154 g|
Grapefruit Glycemic index (GI)
Grapefruit Glycemic load (GL)
Mineral coverage chart
Mineral chart - relative view
Vitamin coverage chart
Vitamin chart - relative view
Protein quality breakdown
Fat type information
All nutrients for Grapefruit per 100g
|Nutrient||Value||DV%||In TOP % of foods||Comparison|
|Calories||42kcal||2%||90%||1.1 times less than Orange|
|Protein||0.77g||2%||88%||3.7 times less than Broccoli|
|Fats||0.14g||0%||90%||237.9 times less than Cheddar Cheese|
|Vitamin C||31.2mg||35%||15%||1.7 times less than Lemon|
|Net carbs||9.06g||N/A||48%||6 times less than Chocolate|
|Carbs||10.66g||4%||48%||2.6 times less than Rice|
|Iron||0.08mg||1%||94%||32.5 times less than Beef|
|Calcium||22mg||2%||51%||5.7 times less than Milk|
|Potassium||135mg||4%||74%||1.1 times less than Cucumber|
|Magnesium||9mg||2%||85%||15.6 times less than Almond|
|Sugar||6.89g||N/A||45%||1.3 times less than Coca-Cola|
|Fiber||1.6g||6%||42%||1.5 times less than Orange|
|Copper||0.03mg||4%||88%||4.4 times less than Shiitake|
|Zinc||0.07mg||1%||93%||90.1 times less than Beef|
|Phosphorus||18mg||3%||89%||10.1 times less than Chicken meat|
|Vitamin A||1150IU||23%||18%||14.5 times less than Carrot|
|Vitamin A RAE||58µg||6%||33%|
|Vitamin E||0.13mg||1%||82%||11.2 times less than Kiwifruit|
|Vitamin B1||0.04mg||4%||75%||6.2 times less than Pea raw|
|Vitamin B2||0.03mg||2%||87%||4.2 times less than Avocado|
|Vitamin B3||0.2mg||1%||87%||46.9 times less than Turkey meat|
|Vitamin B5||0.26mg||5%||76%||4.3 times less than Sunflower seed|
|Vitamin B6||0.05mg||4%||77%||2.2 times less than Oat|
|Folate||13µg||3%||56%||4.7 times less than Brussels sprout|
|Saturated Fat||0.02g||0%||91%||280.7 times less than Beef|
|Monounsaturated Fat||0.02g||N/A||89%||490 times less than Avocado|
|Polyunsaturated fat||0.04g||N/A||92%||1310.4 times less than Walnut|
|Tryptophan||0.01mg||0%||97%||38.1 times less than Chicken meat|
|Threonine||0.01mg||0%||98%||55.4 times less than Beef|
|Isoleucine||0.01mg||0%||98%||114.3 times less than Salmon raw|
|Leucine||0.02mg||0%||98%||162.1 times less than Tuna|
|Lysine||0.02mg||0%||97%||23.8 times less than Tofu|
|Methionine||0.01mg||0%||97%||13.7 times less than Quinoa|
|Phenylalanine||0.01mg||0%||98%||51.4 times less than Egg|
|Valine||0.02mg||0%||98%||135.3 times less than Soybean raw|
|Histidine||0.01mg||0%||98%||93.6 times less than Turkey meat|
|Fructose||1.77g||2%||84%||3.3 times less than Apple|
|Omega-3 - EPA||0g||N/A||100%||N/A|
|Omega-3 - DHA||0g||N/A||100%||N/A|
|Omega-3 - DPA||0g||N/A||100%||N/A|
Check out similar food or compare with current
NUTRITION FACTS LABEL
Serving Size ______________
Grapefruit nutrition infographic
The source of all the nutrient values on the page (excluding the main article and glycemic index text the sources for which are presented separately if present) is the USDA's FoodCentral. The exact link to the food presented on this page can be found below.