Proteins · Nutrition facts
🐟Calories in Tuna
A 3 oz canned in water of tuna (85 g) has 99 calories, with 22.1 g protein, 0 g carbs and 0.9 g fat.
Calories
99
Protein
22.1 g
Carbs
0 g
Fat
0.9 g
Tuna nutrition by serving size
| Serving | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 3 oz canned in water | 99 | 22.1 g | 0 g | 0.9 g |
| 100 g | 116 | 26 g | 0 g | 1 g |
| 1 oz (28 g) | 33 | 7.4 g | 0 g | 0.3 g |
| 1 cup (≈225 g) | 261 | 58.5 g | 0 g | 2.3 g |
| 200 g | 232 | 52 g | 0 g | 2 g |
Values are approximate, rounded from USDA FoodData Central and OpenFoodFacts references. Real plates vary — that's exactly why CalorieScan AI lets you correct any estimate in plain English.
Macro breakdown
- Per 100 g: 116 cal
- Per 1 oz: 33 cal
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Tuna vs other proteins
Frequently asked
How many calories are in tuna?
One 3 oz canned in water of tuna (85 g) has about 99 calories. Per 100 g, tuna has 116 calories.
How much protein is in tuna?
A 3 oz canned in water serving of tuna provides roughly 22.1 g of protein (26 g per 100 g).
What are the macros for tuna?
Per 3 oz canned in water: 22.1 g protein, 0 g carbs and 0.9 g fat — that's roughly 92% protein, 0% carbs and 8% fat by calories.
How do I log tuna without weighing it?
Take a photo of your plate in CalorieScan AI. The app recognises tuna, estimates the portion, and returns calories and macros in about three seconds — then you can fine-tune it in plain English ("make that two servings").
Stop looking up calories.
Snap a photo of tuna — or any meal — and CalorieScan AI does the math. Free on iPhone.
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