How Many Carbs/Calories In Grapefruit, raw

One oz./ounce, when referring to food, is 28.35 grams (g). 100 grams is 3.53 ounces.
One milligram (mg) is 1/1000th gram. One microgram (µg) is 1/1,000,000th gram.

The source of the data can be found here. The source is the Norwegian Food Composition Database 2015, created by the Norwegian Food Safety Authority, The Norwegian Directorate of Health, and University of Oslo, in Norwegian, quality-assured labs. Their site is here.

Possibly related metadata for 'grapefruit'

Disclaimer: This description is part of a partially automated process of collecting data and might not be entirely accurate or even related.
The grapefruit is a subtropical citrus tree known for its sour to semi-sweet fruit, an 18th-century hybrid first bred in Barbados. When found, it was named the "forbidden fruit"; and it has also been misidentified with the pomelo or shaddock, one of the parents of this hybrid, the other being sweet orange.
Source: Wikipedia. Source link.

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The nutrient table shows values per 100 grams of edible food (so the values also serve as percentages for gram units).

Food Item Grapefruit, raw
SubCat Fruit and berries
Carbo (g) 7
Sub2Cat Fruit and berries, raw/fresh
Kilojoules (kJ) 142
Kilocalories (kcal) 33
Fat (g) 0.1
Protein (g) 0.6
Salt (g) 0
Water (g) 91
Sugar (g) 0
Alcohol (g) 0
Beta-carotene (µg) 0
Calcium (mg) 12
Cholesterol (mg) 0
Copper (mg) 0.05
Dietary fibre (g) 1.1
Edible part (%) 50
Folate (µg) 10
FoodID 06.538
Iodine (µg) 0
Iron (mg) 0.1
Magnesium (mg) 8
Mono+Di (g) 7
MuFa (g) 0
Niacin (mg) 0.2
Omega-3 (g) M
Omega-6 (g) M
Phosphorus (mg) 8
Potassium (mg) 139
PuFa (g) 0
Retinol (µg) 46
Riboflavin (mg) 0.02
SatFa (g) 0
Selenium (µg) 1
Sodium (mg) 0
Starch (g) 0
Thiamin (mg) 0.04
TransFa (g) 0
Vitamin A (RAE) 552
Vitamin B12 (µg) 0
Vitamin B6 (mg) 0.04
Vitamin C (mg) 34
Vitamin D (µg) 0
Vitamin E (alfa-TE) 0.1
Zinc (mg) 0.1