Onions, for use on a sandwich
Per 100 g, Onions, for use on a sandwich provides 38 calories, 8.5 g carbohydrate, 0.9 g protein and 1.7 g fibre.
= 38 kcal
Advanced search
Sort
Databases
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.
Protein0.9g9% kcal
Carbs8.5g89% kcal
Fat0.1g2% kcal
Fiber 1.7g
Water90.3g
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%
- Carbohydrate 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
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 µg/day19.0µg19.0µg10%
- 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 µg/day0µg0µg0%
- 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 µg/day0µg0µg0%
- 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 µg/day0µg0µg0%
- Vitamin K Vitamin KFat-soluble vitamin essential for blood clotting and bone metabolism. Concentrated in dark leafy greens.UK adult RI: 75 µg/day0.40µg0.40µg1%
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 µg/day0µg0µg0%
Other
Onions, for use on a sandwich: calories by amount
- 100 g38 kcal
- 150 g57 kcal
- 200 g76 kcal
- 250 g95 kcal
Onions, for use on a sandwich: key facts
Good source of
- How many calories are in Onions, for use on a sandwich?
- Onions, for use on a sandwich has 38 calories per 100 g.
- How much protein is in Onions, for use on a sandwich?
- Onions, for use on a sandwich provides 0.9 g of protein per 100 g.
- How many carbs are in Onions, for use on a sandwich?
- Onions, for use on a sandwich contains 8.5 g of carbohydrate per 100 g, including 1.7 g of fibre.
- How much fat is in Onions, for use on a sandwich?
- Onions, for use on a sandwich 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).