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  6. Watermelon vs. Grapefruit

Watermelon vs. Grapefruit — In-Depth Nutrition Comparison

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How are watermelon and grapefruit different?

  • Grapefruit is higher than watermelon in vitamin C.
  • Grapefruit covers your daily need for vitamin C, 26% more than watermelon.
  • Watermelon has a higher glycemic index (76) than grapefruit (25).

Watermelon, raw and Grapefruit, raw, pink and red, all areas types were used in this article.

Infographic

Watermelon vs Grapefruit infographic
Infographic link

Mineral Comparison

Mineral comparison score is based on the number of minerals by which one or the other food is richer. The "coverage" charts below show how much of the daily needs can be covered by 300 grams of the food.
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 7.1% 2.1% 9.9% 9% 14% 2.7% 4.7% 0.13% 5% 2.2%
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 6.4% 6.6% 12% 3% 11% 1.9% 7.7% 0% 2.9% 0.55%
Contains more IronIron +200%
Contains more CopperCopper +31.3%
Contains more ZincZinc +42.9%
Contains more ManganeseManganese +72.7%
Contains more SeleniumSelenium +300%
Contains more CalciumCalcium +214.3%
Contains more PotassiumPotassium +20.5%
Contains more PhosphorusPhosphorus +63.6%
Contains less SodiumSodium -100%
~equal in Magnesium ~9mg

Vitamin Comparison

Vitamin comparison score is based on the number of vitamins by which one or the other food is richer. The "coverage" charts below show how much of the daily needs can be covered by 300 grams of the food.
Vitamin C Vit. C Vitamin A Vit. A Vitamin E Vit. E Vitamin D Vit. D Vitamin B1 Vit. B1 Vitamin B2 Vit. B2 Vitamin B3 Vit. B3 Vitamin B5 Vit. B5 Vitamin B6 Vit. B6 Vitamin B12 Vit. B12 Vitamin K Vit. K Folate Folate Choline Choline 27% 9.3% 1% 0% 8.3% 4.8% 3.3% 13% 10% 0% 0.25% 2.3% 2.2%
Vitamin C Vit. C Vitamin A Vit. A Vitamin E Vit. E Vitamin D Vit. D Vitamin B1 Vit. B1 Vitamin B2 Vit. B2 Vitamin B3 Vit. B3 Vitamin B5 Vit. B5 Vitamin B6 Vit. B6 Vitamin B12 Vit. B12 Vitamin K Vit. K Folate Folate Choline Choline 104% 19% 2.6% 0% 11% 7.2% 3.8% 16% 12% 0% 0% 9.8% 4.2%
Contains more Vitamin KVitamin K +∞%
Contains more Vitamin CVitamin C +285.2%
Contains more Vitamin AVitamin A +107.1%
Contains more Vitamin EVitamin E +160%
Contains more Vitamin B1Vitamin B1 +30.3%
Contains more Vitamin B2Vitamin B2 +47.6%
Contains more Vitamin B3Vitamin B3 +14.6%
Contains more Vitamin B5Vitamin B5 +18.6%
Contains more Vitamin B6Vitamin B6 +17.8%
Contains more FolateFolate +333.3%
Contains more CholineCholine +87.8%
~equal in Vitamin D ~0µg
~equal in Vitamin B12 ~0µg

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
8% 91%
Protein: 0.61 g
Fats: 0.15 g
Carbs: 7.55 g
Water: 91.45 g
Other: 0.24 g
11% 88%
Protein: 0.77 g
Fats: 0.14 g
Carbs: 10.66 g
Water: 88.06 g
Other: 0.37 g
Contains more ProteinProtein +26.2%
Contains more CarbsCarbs +41.2%
Contains more OtherOther +54.2%
~equal in Fats ~0.14g
~equal in Water ~88.06g

Fat Type Comparison

Fat type breakdown side-by-side comparison
16% 36% 49%
Saturated fat: Sat. Fat 0.016 g
Monounsaturated fat: Mono. Fat 0.037 g
Polyunsaturated fat: Poly. Fat 0.05 g
27% 26% 47%
Saturated fat: Sat. Fat 0.021 g
Monounsaturated fat: Mono. Fat 0.02 g
Polyunsaturated fat: Poly. Fat 0.036 g
Contains less Sat. FatSaturated fat -23.8%
Contains more Mono. FatMonounsaturated fat +85%
Contains more Poly. FatPolyunsaturated fat +38.9%

Carbohydrate type comparison

Carbohydrate type breakdown side-by-side comparison
19% 25% 54%
Starch: 0 g
Sucrose: 1.21 g
Glucose: 1.58 g
Fructose: 3.36 g
Lactose: 0 g
Maltose: 0.06 g
Galactose: 0 g
51% 23% 26%
Starch: 0 g
Sucrose: 3.51 g
Glucose: 1.61 g
Fructose: 1.77 g
Lactose: 0 g
Maltose: 0 g
Galactose: 0 g
Contains more FructoseFructose +89.8%
Contains more MaltoseMaltose +∞%
Contains more SucroseSucrose +190.1%
~equal in Starch ~0g
~equal in Glucose ~1.61g
~equal in Lactose ~0g
~equal in Galactose ~0g

Comparison summary table

Pay attention to the rightmost column. It displays the amounts side by side, giving a clearer understanding of the difference.
Watermelon Grapefruit
Lower in Sugar ok
Lower in Saturated fat ok
Lower in price ok
Rich in minerals ok
Lower in Sodium ok
Lower in Glycemic Index ok
Rich in vitamins ok
Lower in Cholesterol Equal

All nutrients comparison - raw data values

Nutrient Watermelon Grapefruit DV% diff.
Vitamin C 8.1mg 31.2mg 26%
Fiber 0.4g 1.6g 5%
Vitamin A 28µg 58µg 3%
Folate 3µg 13µg 3%
Fructose 3.36g 1.77g 2%
Calcium 7mg 22mg 2%
Iron 0.24mg 0.08mg 2%
Choline 4.1mg 7.7mg 1%
Vitamin B6 0.045mg 0.053mg 1%
Vitamin B5 0.221mg 0.262mg 1%
Vitamin B2 0.021mg 0.031mg 1%
Selenium 0.4µg 0.1µg 1%
Manganese 0.038mg 0.022mg 1%
Vitamin E 0.05mg 0.13mg 1%
Calories 30kcal 42kcal 1%
Vitamin B1 0.033mg 0.043mg 1%
Copper 0.042mg 0.032mg 1%
Potassium 112mg 135mg 1%
Phosphorus 11mg 18mg 1%
Carbs 7.55g 10.66g 1%
Protein 0.61g 0.77g 0%
Fats 0.15g 0.14g 0%
Net carbs 7.15g 9.06g N/A
Magnesium 10mg 9mg 0%
Sugar 6.2g 6.89g N/A
Zinc 0.1mg 0.07mg 0%
Sodium 1mg 0mg 0%
Vitamin B3 0.178mg 0.204mg 0%
Vitamin K 0.1µg 0µg 0%
Saturated fat 0.016g 0.021g 0%
Monounsaturated fat 0.037g 0.02g 0%
Polyunsaturated fat 0.05g 0.036g 0%
Tryptophan 0.007mg 0.008mg 0%
Threonine 0.027mg 0.013mg 0%
Isoleucine 0.019mg 0.008mg 0%
Leucine 0.018mg 0.015mg 0%
Lysine 0.062mg 0.019mg 0%
Methionine 0.006mg 0.007mg 0%
Phenylalanine 0.015mg 0.013mg 0%
Valine 0.016mg 0.015mg 0%
Histidine 0.006mg 0.008mg 0%

Which food is preferable for your diet?

ok
ok
is better in case of low diet
Watermelon Grapefruit
Low Calories diet ok
Low Fats diet ok
Low Carbs diet ok
Low Glycemic Index diet ok

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Vitamins & Minerals Daily Need Coverage Score

The summary scores indicate the extent to which this food can fulfill your daily vitamin and mineral requirements if you consume 3 servings, consisting of 100 grams of each (an approximation of 3 serving sizes).
Vitamins Daily Need Coverage Score
6%
Watermelon
15%
Grapefruit
Minerals Daily Need Coverage Score
6%
Watermelon
5%
Grapefruit

Comparison summary

Which food is lower in Sugar?
Watermelon
Watermelon is lower in Sugar (difference - 0.69g)
Which food is lower in Saturated fat?
Watermelon
Watermelon is lower in Saturated fat (difference - 0.005g)
Which food is cheaper?
Watermelon
Watermelon is cheaper (difference - $0.2)
Which food is richer in minerals?
Watermelon
Watermelon is relatively richer in minerals
Which food contains less Sodium?
Grapefruit
Grapefruit contains less Sodium (difference - 1mg)
Which food is lower in glycemic index?
Grapefruit
Grapefruit is lower in glycemic index (difference - 51)
Which food is richer in vitamins?
Grapefruit
Grapefruit is relatively richer in vitamins
Which food contains less Cholesterol?
?
The foods are relatively equal in Cholesterol (0 mg)

References

All the values for which the sources are not specified explicitly are taken from FDA’s Food Central. The exact link to the food presented on this page can be found below.

  1. Watermelon - https://fdc.nal.usda.gov/fdc-app.html#/food-details/167765/nutrients
  2. Grapefruit - https://fdc.nal.usda.gov/fdc-app.html#/food-details/174673/nutrients

All the Daily Values are presented for males aged 31-50, for 2000-calorie diets.

Data provided by FoodStruct.com should be considered and used as information only. Please consult your physician before beginning any diet.