Tuna (Canned in Water) Calories & Nutrition Facts
High-protein, low-fat seafood ideal for weight management and muscle recovery.
Quick answer
How many calories are in Tuna (Canned in Water)?
Tuna (Canned in Water) has 116 calories per 100g. A 1/2 can drained (56g) has about 65 calories. It is a moderate-calorie food, with most calories coming from protein.
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Source review
Canned Tuna Source Review: Calories, Protein, Sodium, and Mercury Context
Reviewed May 17, 2026. This page uses a water-packed canned tuna profile, scales drained portions, and separates nutrition tracking from seafood safety context.
- The page uses a 100g reference so canned tuna can be compared with chicken breast, turkey breast, salmon, sardines, and other protein foods on the same basis.
- Drained can weight is the practical tracking unit; packing water and brand-specific sodium can make label values differ from the generic reference.
- FDA seafood advice treats tuna type and serving frequency differently, so mercury context belongs in food selection rather than calorie math.
- Oil-packed tuna, flavored pouches, albacore, skipjack, and low-sodium products should be checked against the package label for brand-level precision.
Practical Portion Guide for Tuna (Canned in Water)
| Portion | Calories | Protein | Carbs | Net carbs | Fat |
|---|---|---|---|---|---|
| 1/2 can drained (56g) | 65 kcal | 14.3g | 0.0g | 0.0g | 0.6g |
| 3 oz drained tuna (85g) | 99 kcal | 21.7g | 0.0g | 0.0g | 0.8g |
| 1 can drained (113g) | 131 kcal | 28.8g | 0.0g | 0.0g | 1.1g |
| 100g reference | 116 kcal | 25.5g | 0.0g | 0.0g | 1.0g |
Track drained weight, not the full can with packing water. Sodium can vary sharply by brand, so the label matters more than the fish name for salt tracking.
% Daily Value: 1/2 can drained (56g) vs 100g
Percent Daily Values use the FDA reference amounts for adults (protein 50g, fiber 28g, carbohydrate 275g, fat 78g, sodium 2,300mg, cholesterol 300mg, potassium 4,700mg). The FDA label guide treats 20% DV or more per serving as high and 5% DV or less as low. Potassium comes from USDA FoodData Central FDC ID 171986 (Fish, tuna, light, canned in water, without salt, drained solids); the other values are this page's 100g reference scaled to the portion.
| Nutrient | Per 100g | % DV | 1/2 can drained (56g) | % DV |
|---|---|---|---|---|
| Protein | 25.5g | 51% | 14.3g | 29% |
| Dietary fiber | 0g | 0% | 0g | 0% |
| Total carbohydrate | 0g | 0% | 0g | 0% |
| Total fat | 1g | 1% | 0.6g | 1% |
| Sodium | 337mg | 15% | 189mg | 8% |
| Cholesterol | 49mg | 16% | 27mg | 9% |
| Potassium (USDA) | 237mg | 5% | 133mg | 3% |
Source: FDA Daily Values (21 CFR 101.9), checked September 17, 2026. USDA record: FDC ID 171986.
Serving Size Calculator
Macros Breakdown (per 100g)
Diet Suitability
How Tuna (Canned in Water) Fits Into a Diet
Canned tuna in water is best when you want a very lean, shelf-stable protein source for sandwiches, salads, rice bowls, and quick meals.
Pair tuna with potatoes, rice, whole-grain bread, beans, vegetables, avocado, or Greek yogurt dressing depending on whether you need more carbs, fiber, or fat.
Water-packed, oil-packed, pouch, albacore, skipjack, low-sodium, and flavored tuna products are nutritionally different; this page represents canned tuna in water.
Plan Around Tuna (Canned in Water)
High-Protein Low-Calorie Foods
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Keto Diet Guide
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Compare Tuna (Canned in Water) With Similar Proteins
Use this comparison when choosing a serving. Calories alone do not tell the full story: protein, fiber, fat, sodium, and realistic portion size determine whether a food fits your plan.
| Food | Calories | Protein | Carbs | Fat | Fiber |
|---|---|---|---|---|---|
| Tuna (Canned in Water) | 116 kcal | 25.5g | 0g | 1g | 0g |
| Chicken Breast | 165 kcal | 31g | 0g | 3.6g | 0g |
| Salmon | 208 kcal | 20g | 0g | 13g | 0g |
| Eggs (Whole) | 155 kcal | 13g | 1.1g | 11g | 0g |
| Beef (Lean Ground) | 215 kcal | 26g | 0g | 12g | 0g |
| Pork Tenderloin | 143 kcal | 26g | 0g | 3.5g | 0g |
All comparison values use each food's 100-unit reference so foods can be compared on the same basis.
Vitamins & Minerals
Vitamins
Minerals
Complete Nutrition Facts (per 100g)
% DV = percent of the FDA Daily Value for a 2,000-calorie diet, per 100g. Total sugars have no Daily Value; the FDA value applies to added sugars only.
Methodology & Nutrition Data Sources
How we calculate nutrition data for Tuna (Canned in Water): Calorie and macronutrient values are standardized reference profiles, generally based on USDA FoodData Central entries where available, then scaled to the serving you choose. Entries may come from different FDC data types or releases, and brand or preparation differences can change the numbers.
- Calorie and macronutrient data sourced from the USDA FoodData Central , the federal food composition database used as the main reference where a matching entry exists.
- Daily Value context: for % DV comparisons, use the FDA Daily Value reference amounts for a 2,000 calorie diet (21 CFR 101.9).
- Dietary reference intakes (DRI) for vitamins and minerals are available in the National Academies Dietary Reference Intake tables for further reading; this page does not calculate DRI percentages.
- Glycemic index values are approximate listed values; GI varies by variety, ripeness, and preparation, so compare with the Harvard Health Glycemic Index Reference and the University of Sydney GI database.
- Dietary guidelines context from the HHS/USDA Dietary Guidelines for Americans 2020–2025 , the federal evidence-based nutrition guidance.
Authoritative nutrition data sources:
- USDA FoodData Central, comprehensive food composition database
- FDA Nutrition Facts Label rules, % Daily Value methodology
- NIH Office of Dietary Supplements, vitamin and mineral research
- CDC Nutrition, Public Health Guidance, chronic disease and diet
- HHS/USDA Dietary Guidelines 2020–2025, federal nutrition recommendations
- Harvard T.H. Chan School of Public Health, The Nutrition Source, evidence-based dietary guidance
Nutrition Disclaimer: Calorie and nutrient values are generally based on USDA reference data and may vary by brand, preparation method, ripeness, and cooking technique. These values are for informational purposes only and should not replace personalized dietary advice from a registered dietitian. Individuals with medical conditions should consult a healthcare provider before making significant dietary changes.
Reviewed by Priya Lindqvist · Last updated September 17, 2026 · Values may not reflect the newest USDA FoodData Central release
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Frequently Asked Questions
Is Tuna (Canned in Water) high in protein?
Tuna (Canned in Water) has 25.5g protein per 100g, which is 51% of the 50g FDA Daily Value. 1/2 can drained (56g) supplies about 14.3g, or 29% DV. Under the FDA label guide (20% DV or more per serving is high, 5% or less is low), that serving counts as a high-protein serving.
Is Tuna (Canned in Water) a good source of potassium?
USDA FoodData Central lists 237mg potassium per 100g for Fish, tuna, light, canned in water, without salt, drained solids (FDC ID 171986), which is 5% of the 4,700mg Daily Value. 1/2 can drained (56g) provides about 133mg, or 3% DV, a low contribution by the FDA 5% guide.
How many calories are in Tuna (Canned in Water)?
Tuna (Canned in Water) contains 116 calories per 100g serving. Using general 4-4-9 calorie factors, that is roughly 102 calories from protein, 0 calories from carbohydrates, and 9 calories from fat; these estimates may not add up exactly to the listed total.
Is Tuna (Canned in Water) good for weight loss?
Tuna (Canned in Water) can be part of a weight loss diet with 116 calories per 100g. Monitor portion sizes and balance it with other low-calorie foods throughout the day.
How much protein is in Tuna (Canned in Water)?
Tuna (Canned in Water) contains 25.5g of protein per 100g. This makes it an excellent high-protein food, ideal for muscle building and recovery.
What serving size should I track for Tuna (Canned in Water)?
Track Tuna (Canned in Water) by grams when precision matters. A practical starting point is 1/2 can drained (56g), which is about 65 calories. For packaged, restaurant, fried, sauced, or sweetened versions, use the product label because brand formulas can differ from the plain reference.
Is Tuna (Canned in Water) keto-friendly?
Yes, Tuna (Canned in Water) is keto-friendly with only 0g of carbohydrates per 100g. It fits well within the typical keto macro limits of 20-50g net carbs per day.
Is Tuna (Canned in Water) good for diabetics?
Tuna (Canned in Water) may fit a diabetes meal plan, but the useful decision is the actual portion, total carbohydrates, added sugar, and the rest of the meal. People using diabetes medication should follow personalized clinical guidance.
What vitamins and minerals are in Tuna (Canned in Water)?
Calorique's food profile lists vitamins B12, Niacin, B6 and minerals including Selenium, Phosphorus for Tuna (Canned in Water). These are general highlights, not measured amounts or a "good source" rating; check USDA FoodData Central or the product label for exact micronutrient values.
Where does Calorique get nutrition data for Tuna (Canned in Water)?
Calorique standardizes Tuna (Canned in Water) nutrition values per 100g using USDA FoodData Central reference fields where available, then scales the data into realistic serving sizes. FDA Nutrition Facts methodology and authoritative nutrition references are used for context. This page was last reviewed September 17, 2026.
Related Calculators
Chicken Breast
165 cal · 31g protein per 100g
Salmon
208 cal · 20g protein per 100g
Eggs (Whole)
155 cal · 13g protein per 100g
Beef (Lean Ground)
215 cal · 26g protein per 100g
Pork Tenderloin
143 cal · 26g protein per 100g
Tofu (Firm)
76 cal · 8g protein per 100g
Turkey Breast
135 cal · 30g protein per 100g
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