How many calories are in a tin of tuna?

A small tin drained to about 100 g has around 110 kcal if packed in water.

Calories in tinned tuna

Tuna in spring water has about 110 kcal and 25 g of protein per 100 g drained, so a small tin is a cheap, high protein lunch.

By the Calori team · Updated 21 October 2026 · 3 min read

Tinned tuna calories by portion

Portion	Calories	Protein	Carbs	Fat
100 g drained, in spring water	110 kcal	25 g	0 g	0.8 g
Small tin, drained (about 100 g)	110 kcal	25 g	0 g	0.8 g
100 g drained, in sunflower oil	190–200 kcal

Tinned tuna nutrition per 100 g

Energy	110 kcal (460 kJ)
Protein	25 g
Carbohydrate	0 g
of which sugars	0 g
Fat	0.8 g
Fibre	0 g

Typical values. Carbohydrate excludes fibre, as on UK food labels. Brands and varieties differ, so check the label where there is one.

Water, brine or oil

Tuna in spring water or brine has about the same calories. Tuna in oil has nearly twice as many, even when drained, because some oil stays in the fish.

Log it without looking it up

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Frequently asked questions

How many calories are in a tin of tuna?: A small tin drained to about 100 g has around 110 kcal if packed in water.
How much protein is in tinned tuna?: About 25 g per 100 g drained.