Calories in Onion
44kcal
Per 1 medium (110g)
Protein
1.2g
Carbs
9.9g
Fat
0.1g
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Yellow onion — aromatic vegetable, base for most cooked dishes.
Carmelized onions concentrate sugars — ~40 kcal per 1/4 cup carmelized.
Best for
- volume eating — 40 kcal / 100g keeps plates big
- fiber and micronutrient gaps on high-protein diets
Watch out
- drowning produce in creamy dressings you did not log
- dried fruit or juice versions if you meant fresh
How to log it
Log the form you eat (raw, cooked, juiced). 1 medium (~110g) is the practical unit in the app.
Where it fits the day
Almost always fits as the volume layer. If fat/sauce is the real meal, log that honestly.
Cooked, grilled, fried & breaded
Raw or steamed onion stays close to the page numbers. Oil and creamy dressings are where calories hide — typical kcal per 100g:
These are typical ranges, not lab measurements. Restaurant recipes, oils, and sauces vary — treat them as logging estimates and edit if your plate looks heavier.
Common serving sizes
Per 100g: 40 kcal · 1.1g P · 9g C · 0.1g F · 1.7g fiber