Top 10 · Updated October 2026
Lowest-Calorie Red Onions
The 10 lightest red onions products on this list range from 30 to 38.6 kcal per 100 g. The red onions with the fewest calories per 100 g, so you can compare energy density at a glance. We checked 18 red onions with complete data.
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Cipolla rossa di Tropea Calabria IGP
Sapori Dintorni · 500gAlso: Palm oil free · Vegan · Vegetarian
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How we built this list
We ranked all published red onions on Foodmetria that have a photo and the required nutrition data, using values per 100 g from the product label. Ties are broken by Nutri-Score and by how often shoppers scan the product. Rankings update automatically as label data changes. Read our methodology.