Onions, raw

1 slice, large (1/4" thick) (38 g): 15 kcal, 0.4 g protein, 3.5 g carbohydrate and 0 g fat.

Log 1 slice, large (1/4" thick) (38 g) to today

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Nutrition Facts

Serving size1 slice, large (1/4" thick) (38 g)

Amount per serving

Calories15

% Daily Value*

Total Fat 0g	0%
Saturated Fat 0g	0%
Trans Fat 0g
Cholesterol 0mg	0%
Sodium 0mg	0%
Total Carbohydrate 4g	1%
Dietary Fiber <1g	2%
Total Sugars 2g
Includes Added Sugars ≤2g	≤3%
Protein 0g	1%
Vitamin D 0mcg	0%
Calcium 10mg	0%
Iron 0.1mg	0%
Potassium 60mg	0%

* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Estimated values. — means USDA has no value; ≥ is a lower bound. USDA doesn't report added sugars here; they can't exceed total sugars, so ≤ is an upper bound. Source: USDA FoodData Central. Disclaimer.

What 1 slice, large (1/4" thick) (38 g) gives you

Low in total fat, saturated fat, cholesterol, sodium

High is 20% of the Daily Value or more for this portion; low is 5% or less (FDA).

Where the calories come from

10% protein · 88% carbohydrate · 2% fat

Protein: 0 g 10%
Carbs: 4 g 88%
Fat: 0 g 2%

Compared with other foods

Per 100 g, against every food in USDA's data.

Calories: less than 90% of foods
Protein: more than 17% of foods
Total fat: less than 93% of foods
Carbohydrate: more than 54% of foods
Dietary fiber: more than 66% of foods
Total sugars: less than 33% of foods
Sodium: less than 90% of foods

All nutrients (58)

Amounts for 1 slice, large (1/4" thick) (38 g) and per 100 g. % Daily Value is for the portion, where the FDA sets one.

Energy and macronutrients (7)
Nutrient	Portion	100 g	% DV
Calories	15.2 kcal	40 kcal
Protein	0.418 g	1.1 g	1%
Carbohydrate	3.55 g	9.34 g	1%
Dietary fiber	0.646 g	1.7 g	2%
Total sugars	1.61 g	4.24 g
Starch	0 g	0 g
Water	33.9 g	89.1 g

Fats and fatty acids (8)
Nutrient	Portion	100 g	% DV
Total fat	0.038 g	0.1 g	0%
Saturated fat	0.016 g	0.042 g	0%
Trans fat	0 g	0 g
Monounsaturated fat	0.005 g	0.013 g
Polyunsaturated fat	0.006 g	0.017 g
Omega-3 EPA	0 g	0 g
Omega-3 DHA	0 g	0 g
Cholesterol	0 mg	0 mg	0%

Minerals (10)
Nutrient	Portion	100 g	% DV
Calcium	8.74 mg	23 mg	1%
Iron	0.08 mg	0.21 mg	0%
Magnesium	3.8 mg	10 mg	1%
Phosphorus	11 mg	29 mg	1%
Potassium	55.5 mg	146 mg	1%
Sodium	1.52 mg	4 mg	0%
Zinc	0.065 mg	0.17 mg	1%
Copper	0.015 mg	0.039 mg	2%
Manganese	0.049 mg	0.129 mg	2%
Selenium	0.19 mcg	0.5 mcg	0%

Vitamins (13)
Nutrient	Portion	100 g	% DV
Vitamin A	0 mcg	0 mcg	0%
Vitamin C	2.81 mg	7.4 mg	3%
Vitamin D	0 mcg	0 mcg	0%
Vitamin E	0.008 mg	0.02 mg	0%
Vitamin K	0.152 mcg	0.4 mcg	0%
Thiamin (B1)	0.017 mg	0.046 mg	1%
Riboflavin (B2)	0.01 mg	0.027 mg	1%
Niacin (B3)	0.044 mg	0.116 mg	0%
Pantothenic acid (B5)	0.047 mg	0.123 mg	1%
Vitamin B6	0.046 mg	0.12 mg	3%
Folate	7.22 mcg	19 mcg	2%
Vitamin B12	0 mcg	0 mcg	0%
Choline	2.32 mg	6.1 mg	0%

Amino acids (18)
Nutrient	Portion	100 g
Tryptophan	0.005 g	0.014 g
Threonine	0.008 g	0.021 g
Isoleucine	0.005 g	0.014 g
Leucine	0.01 g	0.025 g
Lysine	0.015 g	0.039 g
Methionine	0.001 g	0.002 g
Cystine	0.002 g	0.004 g
Phenylalanine	0.01 g	0.025 g
Tyrosine	0.005 g	0.014 g
Valine	0.008 g	0.021 g
Arginine	0.04 g	0.104 g
Histidine	0.005 g	0.014 g
Alanine	0.008 g	0.021 g
Aspartic acid	0.035 g	0.091 g
Glutamic acid	0.098 g	0.258 g
Glycine	0.01 g	0.025 g
Proline	0.005 g	0.012 g
Serine	0.008 g	0.021 g

Other (2)
Nutrient	Portion	100 g	% DV
Caffeine	0 mg	0 mg
Alcohol	0 g	0 g

In basalfit recipes

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Sources

USDA FoodData Central record 170000(SR Legacy)
U.S. Department of Agriculture, Agricultural Research Service. FoodData Central. fdc.nal.usda.gov
Daily Values and high/low thresholds: FDA, 21 CFR 101.9, 101.54 and 101.62.