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  6. Onion vs. Watermelon

Onion vs. Watermelon — In-Depth Nutrition Comparison

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How are onions and watermelon different?

  • Onions are richer in vitamin B6 and fiber, while watermelon is higher in vitamin A.
  • Watermelon covers your daily need for vitamin A, 11% more than onions.
  • Onions contain 6 times more folate than watermelon. Onions contain 19µg of folate, while watermelon contains 3µg.
  • Onions are lower in sugar.
  • Watermelon has a higher glycemic index (76) than onions (15).

Onions, raw and Watermelon, raw types were used in this article.

Infographic

Onion vs Watermelon 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.
Onion
Onion
6
Magnesium Magnesium Calcium Calcium Potassium Potassium Iron Iron Copper Copper Zinc Zinc Phosphorus Phosphorus Sodium Sodium Manganese Manganese Selenium Selenium 7.1% 6.9% 13% 7.9% 13% 4.6% 12% 0.52% 17% 2.7%
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%
Contains more CalciumCalcium +228.6%
Contains more PotassiumPotassium +30.4%
Contains more ZincZinc +70%
Contains more PhosphorusPhosphorus +163.6%
Contains more ManganeseManganese +239.5%
Contains more SeleniumSelenium +25%
Contains more IronIron +14.3%
Contains less SodiumSodium -75%
~equal in Magnesium ~10mg
~equal in Copper ~0.042mg

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.
Onion
Onion
6
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 25% 0% 0.4% 0% 12% 6.2% 2.2% 7.4% 28% 0% 1% 14% 3.3%
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%
Contains more Vitamin B1Vitamin B1 +39.4%
Contains more Vitamin B2Vitamin B2 +28.6%
Contains more Vitamin B6Vitamin B6 +166.7%
Contains more Vitamin KVitamin K +300%
Contains more FolateFolate +533.3%
Contains more CholineCholine +48.8%
Contains more Vitamin AVitamin A +∞%
Contains more Vitamin EVitamin E +150%
Contains more Vitamin B3Vitamin B3 +53.4%
Contains more Vitamin B5Vitamin B5 +79.7%
~equal in Vitamin C ~8.1mg
~equal in Vitamin D ~0µg
~equal in Vitamin B12 ~0µg

All nutrients comparison - raw data values

Nutrient Onion Watermelon DV% diff.
Vitamin B6 0.12mg 0.045mg 6%
Fiber 1.7g 0.4g 5%
Folate 19µg 3µg 4%
Manganese 0.129mg 0.038mg 4%
Fructose 1.29g 3.36g 3%
Vitamin A 0µg 28µg 3%
Phosphorus 29mg 11mg 3%
Vitamin B5 0.123mg 0.221mg 2%
Calcium 23mg 7mg 2%
Protein 1.1g 0.61g 1%
Zinc 0.17mg 0.1mg 1%
Calories 40kcal 30kcal 1%
Vitamin B1 0.046mg 0.033mg 1%
Potassium 146mg 112mg 1%
Vitamin C 7.4mg 8.1mg 1%
Carbs 9.34g 7.55g 1%
Fats 0.1g 0.15g 0%
Net carbs 7.64g 7.15g N/A
Magnesium 10mg 10mg 0%
Iron 0.21mg 0.24mg 0%
Sugar 4.24g 6.2g N/A
Copper 0.039mg 0.042mg 0%
Sodium 4mg 1mg 0%
Vitamin E 0.02mg 0.05mg 0%
Selenium 0.5µg 0.4µg 0%
Vitamin B2 0.027mg 0.021mg 0%
Vitamin B3 0.116mg 0.178mg 0%
Vitamin K 0.4µg 0.1µg 0%
Choline 6.1mg 4.1mg 0%
Saturated fat 0.042g 0.016g 0%
Monounsaturated fat 0.013g 0.037g 0%
Polyunsaturated fat 0.017g 0.05g 0%
Tryptophan 0.014mg 0.007mg 0%
Threonine 0.021mg 0.027mg 0%
Isoleucine 0.014mg 0.019mg 0%
Leucine 0.025mg 0.018mg 0%
Lysine 0.039mg 0.062mg 0%
Methionine 0.002mg 0.006mg 0%
Phenylalanine 0.025mg 0.015mg 0%
Valine 0.021mg 0.016mg 0%
Histidine 0.014mg 0.006mg 0%

Macronutrient Comparison

Macronutrient breakdown side-by-side comparison
Onion
Onion
3
9% 89%
Protein: 1.1 g
Fats: 0.1 g
Carbs: 9.34 g
Water: 89.11 g
Other: 0.35 g
8% 91%
Protein: 0.61 g
Fats: 0.15 g
Carbs: 7.55 g
Water: 91.45 g
Other: 0.24 g
Contains more ProteinProtein +80.3%
Contains more CarbsCarbs +23.7%
Contains more OtherOther +45.8%
Contains more FatsFats +50%
~equal in Water ~91.45g

Fat Type Comparison

Fat type breakdown side-by-side comparison
Onion
Onion
0
58% 18% 24%
Saturated fat: Sat. Fat 0.042 g
Monounsaturated fat: Mono. Fat 0.013 g
Polyunsaturated fat: Poly. Fat 0.017 g
16% 36% 49%
Saturated fat: Sat. Fat 0.016 g
Monounsaturated fat: Mono. Fat 0.037 g
Polyunsaturated fat: Poly. Fat 0.05 g
Contains less Sat. FatSaturated fat -61.9%
Contains more Mono. FatMonounsaturated fat +184.6%
Contains more Poly. FatPolyunsaturated fat +194.1%

Carbohydrate type comparison

Carbohydrate type breakdown side-by-side comparison
Onion
Onion
1
23% 46% 30%
Starch: 0 g
Sucrose: 0.99 g
Glucose: 1.97 g
Fructose: 1.29 g
Lactose: 0 g
Maltose: 0 g
Galactose: 0 g
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
Contains more GlucoseGlucose +24.7%
Contains more SucroseSucrose +22.2%
Contains more FructoseFructose +160.5%
Contains more MaltoseMaltose +∞%
~equal in Starch ~0g
~equal in Lactose ~0g
~equal in Galactose ~0g

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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. Onion - https://fdc.nal.usda.gov/fdc-app.html#/food-details/170000/nutrients
  2. Watermelon - https://fdc.nal.usda.gov/fdc-app.html#/food-details/167765/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.