Can canned tuna fit a keto diet?

Usually fits, with the stated form and amount caveats

Usually, yes: canned tuna can fit a keto diet.

1 small can weighs 75 g and contains 0.06 g calculated net carbs. The nutrition figures cover Fish, tuna, light, canned in water, drained solids.

Check another amount

Values update from the same USDA record. They do not estimate a personal carb target or ketosis response.

Amount in grams

Listed source portion: 1 small can (75 g).

Calculated net carbs

0.06 g

Total carbohydrate

0.1 g

Dietary fiber

0 g

Editorial illustration of Fish, tuna, canned.

Nutrition facts for Tuna, canned

Source-portion carb band: Lower net carbs per listed portion. The category is based only on calculated net carbs for the listed portion: 5 g or less, more than 5 g to 10 g, or more than 10 g. Your total intake, preparation, and clinical context can change how a food fits your own plan.

Nutrient	Per listed portion: 1 small can (75 g)	Per 100 g
Energy	64 kcal	85 kcal
Protein	14.3 g	19 g
Total fat	0.7 g	0.9 g
Saturated fat	0.2 g	0.2 g
Total carbohydrate	0.1 g	0.1 g
Dietary fiber	0 g	0 g
Calculated net carbs	0.06 g	0.08 g
Total sugars	0 g	0 g
Sodium	164.3 mg	219 mg
Potassium	132 mg	176 mg

The table keeps the USDA basis separate from the selected portion.

1. Food formTuna, canned
2. USDA per-100 g basis0.08 g calculated net carbs
3. Selected source portion0.06 g calculated net carbs
4. Calculation boundaryPortion value is calculated from the cited 100 g record and portion weight

Explore this food category

Compare this form and portion with other records in seafood. The category hub explains why forms, preparation, and portions should not be treated as interchangeable.

For meal-level context, use the high-protein keto food guide.

How the calculation works

Calculated net carbs = total carbohydrate − dietary fiber. For this USDA record, that is 0.1 g − 0 g = 0.08 g per 100 g. Net carbs is a planning convention used on this site; it is not a separate USDA nutrient field or a regulatory nutrition-label value. This calculation does not automatically subtract sugar alcohols.

For the underlying approach and its limitations, see how net carbs are explained and the net-carb calculator.

Food record and source

• USDA food description: Fish, tuna, canned
• FoodData Central ID: FDC ID 2706311
• Dataset: Survey (FNDDS) FNDDS 2021-2023 (2024-10-31)
• Record publication date: 10/31/2024
• Selected portion: 1 small can (75 g)

The nutrition values are reported by the USDA per 100 g. The per-portion column above is calculated from that value and the USDA portion weight; no household measure was invented for this page.

1. USDA FoodData Central, Survey (FNDDS) FNDDS 2021-2023 (2024-10-31), FDC ID 2706311. https://fdc.nal.usda.gov/food-search/?query=2706311, https://fdc.nal.usda.gov/fdc-datasets/FoodData_Central_survey_food_json_2024-10-31.zip

Compare related foods

• Tuna, cooked — Compare another form of tuna.
• Tuna, raw — Compare another form of tuna.
• Bass, baked or broiled — Compare another food in the seafood whole food group.

Browse all Food Database entries or start with the keto food list for practical meal-planning context.

Frequently Asked Questions

Can canned tuna fit a keto diet?

Canned tuna usually fits a keto diet; 1 small can (75 g) contains 0.06 g calculated net carbs.

How many net carbs are in Tuna, canned?

The listed 1 small can (75 g) has 0.06 g calculated net carbs. Per 100 g, the record has 0.08 g calculated net carbs.

How are net carbs calculated for Tuna, canned?

247-Keto calculates net carbs as total carbohydrate minus dietary fiber, capped at zero. For this record, that is 0.1 g total carbohydrate minus 0 g fiber per 100 g. Sugar alcohols are not subtracted by this calculation.

Where do these Tuna, canned nutrition facts come from?

The values come from USDA FoodData Central's Survey (FNDDS) FNDDS 2021-2023 (2024-10-31) release, FDC ID 2706311. The page preserves the listed food description and portion weight so the comparison is traceable.

Article history

1. September 11, 2026Updated after final factual and editorial review
2. August 24, 2026First published