Vegetables
Onion
Per 100 g
- Calories
- 33 kcal
- Protein
- 1 g
- Fiber
- 1.5 g
- Fat
- 0.1 g
Low fat 2% of its calories come from fat. Our scale
All nutrients
Per 100 g of onion. % Daily Value is for an adult, US FDA values.
Macronutrients
| Nutrient | Per 100 g | % DV |
|---|---|---|
| Carbohydrates | 8.4 g | 3% |
| Protein | 1 g | 2% |
| Fat | 0.1 g | 0% |
| Water | 90 g |
Carbohydrates
| Nutrient | Per 100 g | % DV |
|---|---|---|
| Fiber | 1.5 g | 5% |
| Sugars | 6.2 g |
Essential amino acids
| Nutrient | Per 100 g |
|---|---|
| Histidine | 0.01 g |
| Isoleucine | 0.01 g |
| Leucine | 0.03 g |
| Lysine | 0.04 g |
| Methionine | 0 g |
| Phenylalanine | 0.03 g |
| Threonine | 0.02 g |
| Tryptophan | 0.01 g |
| Valine | 0.02 g |
Fats
| Nutrient | Per 100 g | % DV |
|---|---|---|
| Saturated fat | 0.01 g | 0% |
| Monounsaturated fat | 0 g | |
| Polyunsaturated fat | 0.02 g | |
| Omega 3 | 0 g | |
| Omega 6 | 0.02 g | |
| Trans fat | 0 g | |
| Cholesterol | 1 mg | 0% |
Vitamins
| Nutrient | Per 100 g | % DV |
|---|---|---|
| Vitamin A (RAE) | 0 µg | 0% |
| Vitamin C | 7 mg | 8% |
| Vitamin D | 0 µg | 0% |
| Vitamin E | 0 mg | 0% |
| Vitamin K1 | 0 µg | 0% |
| Thiamin (B1) | 0.04 mg | 3% |
| Riboflavin (B2) | 0.01 mg | 1% |
| Niacin (B3) | 0.1 mg | 1% |
| Pantothenic acid (B5) | 0.17 mg | 3% |
| Vitamin B6 | 0.14 mg | 8% |
| Folate (DFE) | 15 µg | 4% |
| Vitamin B12 | 0 µg | 0% |
Linked nutrients open a table that ranks plant foods by that nutrient.
Values by source
The same food in other countries' official food tables, per 100 g. Values differ with variety, soil, season and how each lab measures; here the sources differ by more than a quarter on sugars, calcium (marked ≠).
| Per 100 g | Japan MEXT 2023 Onions, bulb, raw (（たまねぎ類） たまねぎ りん茎 生) | USDA SR Legacy Onions, raw | UK CoFID 2021 Onions, raw | Brazil TACO Onion, raw (Cebola, crua) |
|---|---|---|---|---|
| Calories | 33 kcal | 40 kcal | 35 kcal | 39 kcal |
| Protein | 1 g | 1.1 g | 1 g | 1.7 g |
| Fat | 0.1 g | 0.1 g | 0.1 g | 0.08 g |
| Carbohydrates | 8.4 g | 9.3 g | 10 g | 8.9 g |
| Fiber | 1.5 g | 1.7 g | 2.2 g | 2.2 g |
| Sugars ≠ | 6.2 g | 4.2 g | 6.2 g | – |
| Saturated fat | 0.01 g | 0.04 g | 0 g | – |
| Sodium | 2 mg | 4 mg | 3 mg | 0.6 mg |
| Potassium | 150 mg | 146 mg | 138 mg | 176 mg |
| Calcium ≠ | 17 mg | 23 mg | 30 mg | 14 mg |
| Iron | 0.3 mg | 0.21 mg | 0.3 mg | 0.2 mg |
| Magnesium | 9 mg | 10 mg | 8 mg | 12 mg |
| Zinc | 0.2 mg | 0.17 mg | 0.1 mg | 0.17 mg |
| Vitamin C | 7 mg | 7.4 mg | 3 mg | 4.7 mg |
| Folate (DFE) | 15 µg | 19 µg | 11 µg | – |
| Vitamin A (RAE) | 0 µg | 0 µg | 0.83 µg | – |
UK and Japanese tables measure available carbohydrate; we show total carbohydrate as on US labels (UK: plus fibre). Japan's fibre method also counts resistant starch, so raw starchy foods read higher. A dash: not measured by that table.
How we label fat
Our own scale, stricter than official labels: a food with less than 10% of its calories from fat is labelled Low fat, 10% to under 20% Medium fat, 20% or more High fat. The label describes how the food's calories are made up; official US and UK labels use other limits.
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Source
Standard Tables of Food Composition in Japan, 8th revised edition, 2023 supplement (MEXT): Onions, bulb, raw (（たまねぎ類） たまねぎ りん茎 生), food code 06153. Source: Standard Tables of Food Composition in Japan (Eighth Revised Edition), 2023 supplement, Ministry of Education, Culture, Sports, Science and Technology (MEXT), data updated 27 March 2026; English names from MEXT's 2015 English edition. Values edited by us (units and totals). MEXT website terms of use (Government Standard Terms of Use, compatible with CC BY 4.0). The table. Protein (nitrogen x factor), total lipid and carbohydrate by difference, as USDA measures them; sugars are the sum of the sugars in the carbohydrate tables. Not in that table, taken from USDA SR Legacy (Onions, raw): isoleucine, leucine, lysine, valine, histidine, tryptophan, threonine, methionine, phenylalanine, trans fat. Daily Values: US FDA, 21 CFR 101.9.