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Flaked pale pink tuna is mixed with glossy red tomato pieces and thin white onion slices, forming a moist, loosely piled salad on a plate.
●Low GI

Tomato onion tuna salad Calories

High-protein, low-carb salad with omega-3 fats

In season: Summer · Autumn

CALORIES · 100 G

118kcal

GI

20low

POTASSIUM · 100 G

280mg

FIBER · 100 G

1.2g

Quick answer

1 serving (medium) of Tomato onion tuna salad (180 g) has 212 calories. That works out to 118 calories per 100 g. It contains 8.6 g of carbs, 22.7 g of protein, 9.7 g of fat and 2.2 g of fiber. Its 2.9 µg of B12 covers 120% of the Daily Value. Its glycemic index is 20 (low), so it raises blood sugar slowly.

Tomato onion tuna salad Nutrition Facts

Selected: 1 serving (medium) · 180 g

212

KCAL / 180G

Carbs

8.6g

· 3% DV

Protein

22.7g

· 45% DV

Fat

9.7g

· 12% DV

Fiber

2.2g

· 8% DV

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

Calories come from: Carbs 16% · Protein 43% · Fat 41%

Tomato onion tuna salad nutrition facts table · 1 serving (medium) (180 g)

NutrientAmount% DV
Calories212 kcal
Total fat9.7 g12%
Saturated fat1.62 g8%
Trans fat0 g
Sodium378 mg16%
Total carbohydrate8.6 g3%
Fiber2.2 g8%
Protein22.7 g45%

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 Tomato onion tuna salad?

ServingAmountCalories
1 serving (medium)180 g212 kcal
1 ounce (mini)28 g33 kcal
1 piece (half)90 g106 kcal
100 g100 g118 kcal
1 serving (small)120 g142 kcal
1 cup (chopped)160 g189 kcal
1 piece (whole)180 g212 kcal
1 serving (large)280 g330 kcal
2 cup (chopped)320 g378 kcal

Calculated from 118 calories per 100 g.

Frequently Asked Questions About Tomato onion tuna salad

How do you make tomato onion tuna salad?

To make tomato onion tuna salad, combine chopped tomatoes and onion with drained tuna. Dress it with olive oil, lemon juice, salt, and pepper, then toss just before serving so the tomatoes stay fresh rather than watery.

What ingredients go in tomato onion tuna salad?

Tomatoes, onion, and tuna are the core ingredients in tomato onion tuna salad. Olive oil and lemon are common additions; parsley, cucumber, or olives also work well. Add the dressing shortly before serving to keep the salad crisp.

Should you drain the tuna for tomato onion tuna salad?

Yes, drain canned tuna before adding it to tomato onion tuna salad. Excess liquid can dilute the dressing and make the tomatoes seem watery. If the tuna is packed in oil, reserve or discard the oil according to your preferred richness.

Can you make tomato onion tuna salad without mayonnaise?

Yes, tomato onion tuna salad is often made without mayonnaise. Olive oil and lemon juice give it a lighter, sharper dressing that suits the fresh tomatoes and onion; add mayonnaise only if you prefer a creamy variation.

Why does tomato onion tuna salad get watery?

Tomatoes release juice after they are cut, and salt draws out more moisture. For less liquid in tomato onion tuna salad, chop the tomatoes just before serving and wait to add salt and dressing until the last moment.

How do you make the onion milder in tomato onion tuna salad?

To make the onion milder in tomato onion tuna salad, slice it thinly and soak it briefly in cold water, then drain and pat it dry. This softens its sharp bite without removing all of its flavor.

How long does tomato onion tuna salad last in the fridge?

Keep tomato onion tuna salad in a covered container in the refrigerator and eat it within 1–2 days. Its texture is best on the day it is made, since the tomatoes soften and release liquid as they sit.

What can you serve with tomato onion tuna salad?

Serve tomato onion tuna salad with crusty bread, boiled potatoes, or crackers for an easy meal. It also works as a filling for a sandwich or wrap, though adding bread changes the meal from a low-carb option.

Is tomato onion tuna salad good for weight loss?

Tomato onion tuna salad can fit a weight-loss meal because tuna provides protein and the salad can be served without a heavy dressing. Keep added oil and calorie-dense sides in mind when building the rest of the meal.

Can you use fresh tuna in tomato onion tuna salad?

Yes, cooked fresh tuna can replace canned tuna in tomato onion tuna salad. Let it cool, flake it into bite-size pieces, and fold it in gently. The salad will have a firmer texture and a less salty flavor than with canned tuna.

Tomato onion tuna salad Vitamins & Minerals

Vitamins

B12

2.88µg · 120% DV

B3

9.18mg · 57% DV

Vitamin C

17.64mg · 20% DV

B6

0.32mg · 19% DV

Minerals

Selenium

40µg · 73% DV

Phosphorus

270mg · 39% DV

Sodium

378mg · 16% DV

Copper

0.14mg · 16% DV

Potassium ⭐

504mg · 15% DV

Tomato onion tuna salad Glycemic Index

GLYCEMIC INDEX

20
Low
0 Low5570100

GLYCEMIC LOAD

2.7
Low

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

How to Burn Off Tomato onion tuna salad

To burn the 212 calories in 1 serving (medium) (180 g):

🚶

52min

Walking (5 km/h)

🏃

22min

Running (8 km/h)

🚴

29min

Cycling

🏊

25min

Swimming

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

What is Tomato onion tuna salad?

Tomato onion tuna salad brings chopped tomatoes and onion together with tuna, usually dressed simply with olive oil and lemon. It is an easy home-prepared salad, often made with canned tuna, and may include herbs or other crisp vegetables.

The juicy, slightly sweet tomatoes balance the onion’s sharpness and the tuna’s savoury, substantial bite. Serve it as a light lunch, a side dish, or part of a Mediterranean-style spread; it goes well with crusty bread or leafy greens. It is high in protein and relatively low in carbohydrate, with omega-3 fats from the tuna. For a lighter dressing, use less oil and let lemon juice and herbs add freshness.

How Nutritious Is Tomato onion tuna salad?

Nutrient density

High

74/ 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

53/ 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 Tomato onion tuna salad 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 Tomato onion tuna salad 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 Tomato onion tuna salad 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

Tomato onion tuna salad Fat Profile

SATURATED

1.62g

MONOUNSATURATED

2.7g

POLYUNSATURATED

2.16g

⚖️

Omega 6:3 ratio 5.1:1

Above the ideal 4:1 (5.1:1).

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Nutrition data compiled from USDA FoodData Central and scientific sources.