Top 10 · Updated October 2026
Lowest-Calorie Oat
The 10 lightest oat products on this list range from 40 to 53 kcal per 100 g. The oat with the fewest calories per 100 g, so you can compare energy density at a glance. We checked 423 oat with complete data.
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Porridge oats
Tesco · 1kg
How we built this list
We ranked all published oat 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.