Calories in Tuna (canned in water)

191kcal per 1 can, drained (165 g)

116 kcal per 100 g · about 10% of a 2,000-kcal day

Canned tuna in water is nearly pure protein — about 90% of its calories. A whole can delivers 42 g of protein for under 200 calories.

Tuna (canned in water) nutrition facts

NutrientPer 100 gPer 1 can, drained
Calories116 kcal191 kcal
Protein25.5 g42.1 g
Carbs0 g0 g
Fat0.8 g1.3 g
Fiber0 g0 g
Sugar0 g0 g

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Values based on USDA FoodData Central reference entries. Actual nutrition varies with variety, preparation, and portion. © 2026 NibbleCal.