# How many calories are in a Spanish omelette?

**One slice, 150 g: about 255 calories.**

| By portion size | calories |
|---|---|
| Half portion, 75 g | 128 |
| Portion, 150 g | 255 |
| Double portion, 300 g | 510 |
| Per 100 g | 170 |

The potatoes are slowly cooked in olive oil, which is most of the calories.

Like 55 minutes of walking. As many calories as 14 cucumbers.

Estimate for a typical recipe. Source: rounded reference values from USDA FoodData Central. General information, not a substitute for advice from a dietitian or doctor.

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Photo: Mentxuwiki, CC BY-SA 4.0, https://commons.wikimedia.org/wiki/File:Tortilla_de_patatas_con_cebolla.jpg