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Flaked pinkish-brown tuna is served with thin, curved slices of translucent white and pale-purple onion.
●Low GI
💪High Protein

Tuna fish with onion Calories

Tuna is rich in protein, and pairing with onion adds flavor and nutrients.

In season: Spring · Summer · Autumn · Winter

CALORIES · 100 G

120kcal

GI

15low

POTASSIUM · 100 G

270mg

FIBER · 100 G

0.7g

Quick answer

1 serving (medium) of Tuna fish with onion (120 g) has 144 calories. That works out to 120 calories per 100 g. It contains 3.4 g of carbs, 25.8 g of protein, 2.6 g of fat and 0.8 g of fiber. Its 2.5 µg of B12 covers 105% of the Daily Value. Its glycemic index is 15 (low), so it raises blood sugar slowly.

Tuna fish with onion Nutrition Facts

Selected: 1 serving (medium) · 120 g

144

KCAL / 120G

Carbs

3.4g

· 1% DV

Protein

25.8g

· 52% DV

Fat

2.6g

· 3% DV

Fiber

0.8g

· 3% DV

DV is the share of the daily value covered, on a 2,000 kcal reference diet.

Calories come from: Carbs 10% · Protein 74% · Fat 16%

Tuna fish with onion nutrition facts table · 1 serving (medium) (120 g)

NutrientAmount% DV
Calories144 kcal
Total fat2.6 g3%
Saturated fat0.6 g3%
Trans fat0 g
Sodium336 mg15%
Total carbohydrate3.4 g1%
Fiber0.8 g3%
Protein25.8 g52%

Calories: Calories measure energy. Average daily need is 2,000 kcal. Excess calories are stored as fat, too few cause weight loss.

Carbs: Your body's primary energy source. The brain runs exclusively on carbs. Daily need: 275g.

Protein: Essential for muscle repair and cell growth. Daily need: 50g. Keeps you full and boosts metabolism.

Fat: Needed for hormone production and vitamin absorption. Daily need: 78g. Limit saturated fats, choose unsaturated.

Fiber: Critical for digestive health and satiety. Daily need: 28g. Stabilizes blood sugar, lowers cholesterol.

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How Many Calories in 1 Serving of Tuna fish with onion?

ServingAmountCalories
1 serving (medium)120 g144 kcal
1 serving (extra small)60 g72 kcal
1 serving (small)80 g96 kcal
1 can (small)80 g96 kcal
100 g100 g120 kcal
1 piece (whole)100 g120 kcal
1 pack (medium)100 g120 kcal
1 can (medium)160 g192 kcal
1 serving (large)180 g216 kcal
1 serving (jumbo)250 g300 kcal

Calculated from 120 calories per 100 g.

Frequently Asked Questions About Tuna fish with onion

How do you make tuna with onion?

Mix drained tuna with finely chopped onion, then add lemon juice and black pepper. Parsley works well too. If the onion tastes too sharp, soak it briefly in lemon juice before mixing it in.

Which onion is best for tuna with onion?

Red onion is a popular choice because its mild bite and color work well in a cold tuna salad. Yellow onion has a stronger flavor; slice it finely or rinse it briefly if you want a gentler result.

Can you eat tuna with raw onion?

Yes, tuna with onion is commonly made with raw onion. Chop the onion finely so it mixes evenly, or let it sit in lemon juice for a few minutes to soften its sharp flavor.

What can you add to tuna with onion?

Lemon juice, parsley, and black pepper are simple additions to tuna with onion. For a fuller salad, add chopped celery, tomato, or cucumber; for a sandwich filling, keep watery vegetables separate until serving.

What goes well with tuna with onion?

Tuna with onion works well in a sandwich or wrap, over leafy greens, or alongside crackers. Serve it with lemon and fresh vegetables for a light meal, and keep the mixture chilled until you eat.

Does onion make tuna taste less fishy?

Yes, onion can balance tuna’s strong savory flavor, especially when paired with lemon or herbs. It cannot make spoiled fish safe or fresh, so discard tuna with an unusually sour or unpleasant odor.

Can you cook tuna with onion?

Yes, you can briefly warm tuna with onion, though the combination is more often served cold. Add the onion near the end of cooking to keep it from becoming overly soft, and heat opened tuna thoroughly.

How long does tuna with onion last in the fridge?

Keep tuna with onion in a covered container in the refrigerator and eat it within a day for the best texture. Do not leave it at room temperature for an extended period, particularly after opening the tuna.

Is tuna with onion safe to eat during pregnancy?

Yes, tuna can be eaten during pregnancy in appropriate amounts, but its mercury content varies by species and product. Follow local guidance on tuna types and portions, and ask your prenatal care professional if you are unsure.

Can you prepare tuna with onion ahead of time?

Yes, you can mix tuna with onion a few hours ahead and refrigerate it in a sealed container. The onion releases moisture as it sits, so add it closer to serving if you want the tuna mixture to stay firm.

Tuna fish with onion Vitamins & Minerals

Vitamins

B12

2.52µg · 105% DV

B3

9.36mg · 59% DV

B6

0.72mg · 42% DV

B2

0.23mg · 18% DV

Minerals

Selenium

46µg · 84% DV

Phosphorus

216mg · 31% DV

Iodine

38µg · 25% DV

Sodium

336mg · 15% DV

Potassium ⭐

324mg · 10% DV

Tuna fish with onion Glycemic Index

GLYCEMIC INDEX

15
Low
0 Low5570100

GLYCEMIC LOAD

1.2
Low

Accounts for portion size — a more realistic measure than GI alone.

How to Burn Off Tuna fish with onion

To burn the 144 calories in 1 serving (medium) (120 g):

🚶

36min

Walking (5 km/h)

🏃

15min

Running (8 km/h)

🚴

20min

Cycling

🏊

17min

Swimming

Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.

What is Tuna fish with onion?

Çiyalı ton balığı is tuna prepared with chia seeds; despite the English page label, it is not tuna with onion. The tuna brings a firm, savoury bite, while chia adds a mild, earthy note and softens into a gel-like texture when mixed with liquid.

Serve it in a salad with leafy greens and lemon, tuck it into a sandwich, or offer it as a simple lunch or supper. It is protein-rich and relatively low in carbohydrate. For a lighter meal, use lemon or yoghurt instead of a rich mayonnaise dressing and pair it with plenty of vegetables.

How Nutritious Is Tuna fish with onion?

Nutrient density

High

70/ 100

How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.

Satiety score

High

62/ 100

An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.

Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.

Is Tuna fish with onion Processed?

NOVA 2

Minimally Processed

1. Unprocessed

2. Minimally Processed

3. Processed

4. Ultra-Processed

NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.

Does Tuna fish with onion Contain Allergens?

Contains these allergens:

Gluten free
Dairy free
Eggs free
Peanuts free
Tree nuts free
Fish yes
Soy free
Sesame free

Which Diets Is Tuna fish with onion Good For?

Vegan

— Not suitable

Vegetarian

— Not suitable

Gluten-Free

✓ Suitable

Dairy-Free

— Not suitable

Mediterranean

✓ Suitable

Paleo

✓ Suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

✓ Suitable

Low FODMAP

— Not suitable

Tuna fish with onion Fat Profile

SATURATED

0.6g

MONOUNSATURATED

0.72g

POLYUNSATURATED

0.84g

⚖️

Omega 6:3 ratio 0:1

Below the ideal 4:1 — a good omega balance.

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Nutrition data compiled from USDA FoodData Central and scientific sources.