Onions, raw
Per 100 g, Onions, raw provides 38 calories, 8.5 g carbohydrate, 0.9 g protein and 1.7 g fibre.
38kcal 2% RI Reference IntakeEU/UK adult daily energy reference of 2,000 kcal used on packaged-food nutrition labels (Reg. 1169/2011). Switch to the US toggle for FDA Daily Values.
60%Nutrient scoreNutrient ScoreThe share of this food's 24 rated nutrients that score well for its calories — a good source of beneficial nutrients while staying low in saturated fat, sodium and added sugars.24 available of 33 total nutrients with a Daily Value24of33
Protein0.9g9% kcal
Carbs8.5g89% kcal
Fat0.1g2% kcal
Fiber1.7g
Full nutrient breakdown
Reference
Proximates
- Protein ProteinBuilds and repairs tissue, drives enzymes and hormones. Made up of amino acids — nine of which the body can't make itself.UK adult RI: 50 G/day0.86G0.86G2%
- Fat FatAll fats combined: saturated, monounsaturated, polyunsaturated, and trans. Carries fat-soluble vitamins (A, D, E, K) and contributes 9 kcal per gram.UK adult RI: 70 G/day0.08G0.08G0%
- Total carbohydrate Total carbohydrateAll carbohydrate combined: sugars, starches, and fiber. Calculated by subtracting water + protein + fat + ash from the food's total mass — hence "by difference".UK adult RI: 260 G/day8.46G8.46G3%
- Fiber FiberPlant carbohydrate the body can't digest. Feeds gut bacteria, slows sugar absorption, and supports regular digestion. UK adults: target 30 g/day.UK adult RI: 30 G/day1.70G1.70G6%
Carbohydrates
- Sugars SugarsNaturally-occurring + added sugars combined (mono- and disaccharides).UK adult RI: 90 G/day5.80G5.80G6%
Fats and Fatty Acids
Sterols
Protein and Amino Acids
Vitamins
- Vitamin C Vitamin CWater-soluble antioxidant + cofactor in collagen synthesis. Lost easily in cooking water and air exposure.UK adult RI: 80 MG/day8.20MG8.20MG10%
- Vitamin B1 (thiamin) Vitamin B1 (thiamin)Water-soluble B-vitamin for carbohydrate metabolism and nerve function. Whole grains, pork, and legumes are good sources.UK adult RI: 1.1 MG/day0.05MG0.05MG4%
- Vitamin B2 (riboflavin) Vitamin B2 (riboflavin)Water-soluble B-vitamin for energy production, cell growth, and skin health. Dairy, eggs, and lean meat are densest.UK adult RI: 1.4 MG/day0.03MG0.03MG2%
- Vitamin B3 (niacin) Vitamin B3 (niacin)Water-soluble B-vitamin for energy metabolism. The body can also make some niacin from the amino acid tryptophan.UK adult RI: 16 MG/day0.12MG0.12MG1%
- Vitamin B6 Vitamin B6Water-soluble B-vitamin for amino acid metabolism and neurotransmitter synthesis.UK adult RI: 1.4 MG/day0.12MG0.12MG9%
- Folate FolateWater-soluble B-vitamin essential for DNA synthesis and cell division. Critical pre-conception and in early pregnancy to prevent neural tube defects.UK adult RI: 200 UG/day19.0UG19.0UG10%
- Vitamin B12 Vitamin B12Water-soluble B-vitamin essential for red blood cell formation and the nervous system. Only found naturally in animal foods — vegans need fortified foods or supplements.UK adult RI: 2.5 UG/day0UG0UG0%
- Vitamin A Vitamin AFat-soluble vitamin for vision, immune function, and skin. Measured in retinol activity equivalents (RAE) so plant and animal sources are comparable.UK adult RI: 800 UG/day0UG0UG0%
- Vitamin E Vitamin EFat-soluble antioxidant that protects cell membranes from oxidative damage. Nuts, seeds, and vegetable oils are the densest sources.UK adult RI: 12 MG/day0.02MG0.02MG0%
- Vitamin D Vitamin DFat-soluble vitamin essential for calcium absorption and bone health. The skin also synthesises it from sunlight, so dietary intake matters most over winter.UK adult RI: 5 UG/day0UG0UG0%
- Vitamin K Vitamin KFat-soluble vitamin essential for blood clotting and bone metabolism. Concentrated in dark leafy greens.UK adult RI: 75 UG/day0.40UG0.40UG1%
Minerals
- Calcium CalciumMajor mineral for bone density, muscle contraction, and nerve signalling.UK adult RI: 800 MG/day17.0MG17.0MG2%
- Iron IronCarries oxygen in haemoglobin. Plant (non-heme) iron absorbs less efficiently than meat (heme) iron — pair with vitamin C to boost absorption.UK adult RI: 14 MG/day0.24MG0.24MG2%
- Magnesium MagnesiumCofactor in 300+ enzyme reactions — energy metabolism, muscle relaxation, blood pressure regulation.UK adult RI: 375 MG/day9.00MG9.00MG2%
- Phosphorus PhosphorusMajor mineral for bones, energy storage (ATP), and cell membranes. Widespread in protein-rich foods.UK adult RI: 700 MG/day33.0MG33.0MG5%
- Potassium PotassiumElectrolyte mineral that counters sodium's effect on blood pressure. Concentrated in fruit, vegetables, beans, and dairy.UK adult RI: 2,000 MG/day171MG171MG9%
- Sodium SodiumMineral mostly consumed as salt (sodium chloride). Excess raises blood pressure in salt-sensitive people.UK adult RI: 2,400 MG/day1.00MG1.00MG0%
- Zinc ZincTrace mineral for immune function, wound healing, and sense of taste. Best absorbed from animal foods; phytates in grains reduce uptake.UK adult RI: 10 MG/day0.17MG0.17MG2%
- Copper CopperTrace mineral involved in iron metabolism and connective tissue.UK adult RI: 1 MG/day0.04MG0.04MG4%
- Selenium SeleniumTrace mineral that supports thyroid hormone metabolism and antioxidant defence. Brazil nuts are the densest source.UK adult RI: 55 UG/day0UG0UG0%
Other
Onions, raw: key facts
- How many calories are in Onions, raw?
- Onions, raw has 38 calories per 100 g.
- How much protein is in Onions, raw?
- Onions, raw provides 0.9 g of protein per 100 g.
- How many carbs are in Onions, raw?
- Onions, raw contains 8.5 g of carbohydrate per 100 g, including 1.7 g of fibre.
- How much fat is in Onions, raw?
- Onions, raw has 0.1 g of fat per 100 g.
Values shown for the selected serving and per 100 g. % RI follows the UK / EU Reference Intakes (Reg. 1169/2011) for adults and children 4 + years. Reference only — not medical or dietary advice (Terms & Conditions §3).