Top 10 · Updated October 2026

Lowest-Calorie Onions

The 10 lightest onions products on this list range from 8.6 to 18 kcal per 100 g. The onions with the fewest calories per 100 g, so you can compare energy density at a glance. We checked 170 onions with complete data.

  1. 1 Norsk Rødløk

    Norsk Rødløk

    Gartner
    b 9 kcal 5.7 g sugar 1.1 g protein 0.1 g fat
  2. 2 Oignons doux

    Oignons doux

    Delhaize
    a 12 kcal 1.3 g sugar 1.5 g protein 0 g fat
  3. 3 Petits oignons

    Petits oignons

    Delhaize · 500 g
    a 12 kcal 1.3 g sugar 1.5 g protein 0 g fat
  4. 4 Oignon

    Oignon

    Boni · 1 kg
    12 kcal 1.3 g sugar 1.5 g protein 0 g fat
  5. 5 Petits oignons

    Petits oignons

    DEVOS & LEMMENS · 300ml
    c NOVA 4 17 kcal 2.4 g sugar 0.8 g protein 0.3 g fat

    Also: Palm oil free · No additives

  6. 6 Oignon

    Oignon

    No Name
    a 18 kcal 2.4 g sugar 0.6 g protein 0 g fat
  7. 7 Oignons en cubes

    Oignons en cubes

    Thiriet · 450 g
    a 18 kcal 1.3 g sugar 1.5 g protein 0 g fat
  8. 8 Oignons émincés

    Oignons émincés

    Boni · 250 g
    a 18 kcal 1.3 g sugar 1.5 g protein 0 g fat
  9. 9 Oignons blanc grelots

    Oignons blanc grelots

    Thiriet · 450 g
    a 18 kcal 1.3 g sugar 1.5 g protein 0 g fat
  10. 10 Oignons en rondelles surgelés

    Oignons en rondelles surgelés

    Boni Selection · 1 kg
    18 kcal 1.3 g sugar 1.5 g protein 0 g fat

How we built this list

We ranked all published 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.

More onions rankings

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