What does 100 calories of canned tuna (in oil) look like?

100 calories =⅓ can50 g · 1.8 oz

Medium calorie density1.98 kcal/g

🐟

Each 🐟 = one can (~171.0 g). The last icon shows a part of one.

Food volume for 100 kcal

Canned tuna (in oil) has 198 calories per 100 g, so 100 calories is ⅓ can of canned tuna (50 g). It's one of the better protein sources per calorie here: 14.7 g of protein per 100 kcal.

Canned tuna (in oil): 50 to 500 calories

Calories	Grams	Ounces	Cans
50 kcal	25 g	0.9 oz	¼
100 kcal	50 g	1.8 oz	⅓
200 kcal	101 g	3.6 oz	⅔
300 kcal	152 g	5.4 oz	1
500 kcal	252 g	8.9 oz	1½

What's in 100 calories of canned tuna (in oil)

14.7 gprotein

0.0 gcarbs

4.1 gfat

0.0 gfiber

Protein 61% Carbs 0% Fat 39% of calories

Want more food for the same 100 calories?

These give you at least 2½ times more volume than canned tuna (in oil):

Sauerkraut100 kcal = 3¾ cups 526 g18.6 oz Romaine lettuce100 kcal = 13 cups (shredded) 588 g20.7 oz Asparagus100 kcal = 31 spears 500 g17.6 oz Spinach (raw)100 kcal = 14 cups 435 g15.3 oz

Compare with other protein foods

Food	100 kcal is	Grams
🐟 Canned tuna (in oil)	⅓ can	50 g
🥚 Egg whites	5¾ large egg whites	192 g
⬜ Tofu (firm)	1½ quarter blocks	128 g
🦞 Lobster (cooked)	¾ cup	112 g
🫘 Refried beans	½ cup	111 g
🫘 Baked beans	½ cup	106 g
🦀 Crab (cooked)	3⅔ oz	103 g
🐟 Cod (cooked)	½ fillet	95 g
🦃 Turkey breast (deli)	6 slices	94 g
🐟 Canned tuna (in water)	½ can	86 g
🫘 Lentils (cooked)	½ cup	86 g
🍤 Shrimp (cooked)	15 large shrimp	84 g
🫛 Edamame (shelled)	½ cup	83 g

See all protein foods →

Questions

How much is 100 calories of canned tuna (in oil)?

100 calories of canned tuna (in oil) is about 50 g (1.8 oz), or roughly ⅓ can.

How many calories are in 100 g of canned tuna (in oil)?

198 calories per 100 g, according to USDA FoodData Central.

Is canned tuna good for weight loss?

Medium calorie density (1.98 kcal per gram). Fine in sensible portions; easy to overeat if you don't measure. 100 calories also gives you 14.7 g of protein and 0.0 g of fiber.

How many calories are in one can?

About 339 calories.

How many cans is 200 calories?

About ⅔ (101 g).

Free printable

One page with 300+ foods and their exact 100-calorie portions. Stick it on the fridge.

Source: USDA FoodData Central, "Fish, tuna, light, canned in oil, drained solids" (FDC ID 173708). Grams for 100 kcal = 100 ÷ calories per gram. Unit weight: USDA: 1 can = 171.0 g. Real portions vary by size, variety and preparation. Updated 2026-10-23.