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Pinkish-brown tuna flakes and chunks are mixed with thin, curved strips of pale onion and served together on a plate.
●Low GI
💪High Protein

Tuna with onion Calories

High-protein, low-carb tuna mixed with onion

CALORIES · 100 G

144kcal

GI

10low

POTASSIUM · 100 G

290mg

FIBER · 100 G

0.6g

Quick answer

1 serving (medium) of Tuna with onion (120 g) has 173 calories. That works out to 144 calories per 100 g. It contains 4.3 g of carbs, 28.6 g of protein, 4.6 g of fat and 0.7 g of fiber. Its 2.9 µg of B12 covers 120% of the Daily Value. Its glycemic index is 10 (low), so it raises blood sugar slowly.

Tuna with onion Nutrition Facts

Selected: 1 serving (medium) · 120 g

173

KCAL / 120G

Carbs

4.3g

· 2% DV

Protein

28.6g

· 57% DV

Fat

4.6g

· 6% DV

Fiber

0.7g

· 3% DV

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

Calories come from: Carbs 10% · Protein 66% · Fat 24%

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

NutrientAmount% DV
Calories173 kcal
Total fat4.6 g6%
Saturated fat1.08 g5%
Trans fat0 g
Sodium348 mg15%
Total carbohydrate4.3 g2%
Fiber0.7 g3%
Protein28.6 g57%

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 with onion?

ServingAmountCalories
1 serving (medium)120 g173 kcal
1 tablespoon (shredded)15 g22 kcal
2 tablespoon (shredded)30 g43 kcal
½ cup (shredded)75 g108 kcal
1 piece (small)90 g130 kcal
100 g100 g144 kcal
1 cup (shredded)150 g216 kcal
1 pack (whole)160 g230 kcal
1 serving (large)180 g259 kcal

Calculated from 144 calories per 100 g.

Frequently Asked Questions About Tuna with onion

How do you make tuna with onion?

Tuna with onion is made by mixing drained tuna with finely chopped onion. Add lemon juice, olive oil, and black pepper to taste, then serve it on toast, in a sandwich, or alongside a green salad.

Can you make tuna with onion using canned tuna?

Yes, canned tuna works well for tuna with onion. Drain it first so the mixture does not turn watery; if the tuna is packed in oil, use less extra oil when dressing it.

Which onion is best for tuna with onion?

Red onion is a good choice for tuna with onion because its sharpness is often milder when finely sliced. Yellow or white onion also works, but has a stronger bite; soaking it briefly in cold water softens that flavor.

Can you add mayonnaise to tuna with onion?

Yes, mayonnaise can be mixed into tuna with onion for a creamy filling. Start with a small spoonful so it does not overwhelm the tuna, or use lemon juice and olive oil for a lighter, sharper dressing.

How do you make the onion taste milder in tuna with onion?

To make the onion milder in tuna with onion, soak the chopped onion briefly in cold water, then drain it thoroughly. A squeeze of lemon also balances its sharpness without making the tuna mixture heavy.

Is tuna with onion good in a sandwich?

Yes, tuna with onion makes a good sandwich filling. Drain the tuna well and layer lettuce between the filling and bread to help prevent sogginess; add tomato just before eating so it does not release much liquid.

What should you serve with tuna with onion?

Tuna with onion pairs well with crusty bread, crackers, a green salad, or boiled potatoes. For a quick lunch, serve it with cucumber and tomato; for a more substantial meal, use it as a filling in a wrap.

How long does tuna with onion last in the fridge?

Tuna with onion should be kept in a sealed container in the refrigerator and eaten promptly for the best texture. Do not leave it sitting at room temperature for an extended time, and discard any portion that has been left out too long.

Can you cook the onion before adding it to tuna with onion?

Yes, you can cook the onion before mixing it into tuna with onion. Sauté it until soft, then let it cool first; adding hot onion directly can make the tuna dry and gives the dish a softer, sweeter flavor.

What seasonings go well in tuna with onion?

Lemon juice, black pepper, parsley, and a little olive oil complement tuna with onion. Capers or chopped pickles add a salty, tangy note, so taste the mixture before adding extra salt.

Tuna with onion Vitamins & Minerals

Vitamins

B12

2.88µg · 120% DV

B3

12.48mg · 78% DV

B6

0.58mg · 34% DV

B2

0.14mg · 11% DV

Minerals

Selenium

62µg · 113% DV

Phosphorus

282mg · 40% DV

Sodium

348mg · 15% DV

Iodine

22µg · 15% DV

Potassium ⭐

348mg · 10% DV

Tuna with onion Glycemic Index

GLYCEMIC INDEX

10
Low
0 Low5570100

GLYCEMIC LOAD

0.5
Low

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

How to Burn Off Tuna with onion

To burn the 173 calories in 1 serving (medium) (120 g):

🚶

43min

Walking (5 km/h)

🏃

18min

Running (8 km/h)

🚴

24min

Cycling

🏊

20min

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 with onion?

Tuna with onion brings together tuna and sliced or chopped onion. It is often made with drained canned tuna for convenience, though freshly cooked tuna can also be used. Rather than belonging to one particular regional cuisine, it is a simple combination found in home cooking and casual meals around the world.

The tuna’s savoury, substantial taste is lifted by the onion’s sharper bite. Serve it over leafy salad, tuck it into a sandwich, or add lemon and herbs for a quick lunch. It is high in protein and relatively low in carbohydrates, so it can suit a filling lighter meal; draining the tuna and using lemon instead of a creamy dressing keeps it lighter.

How Nutritious Is Tuna with onion?

Nutrient density

High

78/ 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

Medium

59/ 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 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 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 with onion Good For?

Vegan

— Not suitable

Vegetarian

— Not suitable

Gluten-Free

✓ Suitable

Dairy-Free

— Not suitable

Mediterranean

✓ Suitable

Paleo

— Not suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

✓ Suitable

Low FODMAP

— Not suitable

Tuna with onion Fat Profile

SATURATED

1.08g

MONOUNSATURATED

1.2g

POLYUNSATURATED

0.6g

⚖️

Omega 6:3 ratio 0.3:1

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

Compare Tuna with onion

🐟vs🐟
Tuna with onion vs Salmon Fillet62 kcal fewer per 100 g
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🐟vs🐟
Tuna with onion vs Canned Tuna28 kcal more per 100 g
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Foods Similar to Tuna with onion

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Salmon Fillet

206 kcal

🐟

Canned Tuna

116 kcal

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110 kcal

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Tuna

132 kcal

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Baked Sea Bass

110 kcal

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Grilled Sea Bass

124 kcal

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Whiting

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Stuffed Mussels

175 kcal

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Nutrition data compiled from USDA FoodData Central and scientific sources.