Keto Approved
Tuna (Canned in Water)
0.00g net carbs per 3 oz
Lean, so pair with fat sources. Affordable and convenient keto protein.
By MeKeto Editorial · Last updated July 2026
Nutrition Facts
Fits My Daily Budget?
Set your daily net carb limit to see how one serving fits.
One serving uses 0% of your 20g daily budget.
Plan the rest of your day
Good to Know
Brands like StarKist and Bumble Bee sell solid white albacore and chunk light versions, with chunk light packing a bit less mercury for folks eating it often. Drain the can well and you keep all 22 g of protein with basically zero carbs to track. Skip the flavored pouches with teriyaki, sweet chili, or honey glazes, since those add sugar that plain water-packed cans never carry.
Is Tuna (Canned in Water) Keto? The Full Answer
Tuna contains 0.00g net carbs per 3 oz (0.00g total carbs minus 0.00g fiber). Lean, so pair with fat sources. Affordable and convenient keto protein.
On a standard ketogenic diet, most people target 20-25g net carbs per day. A single serving uses 0% of a 20g daily carb limit. That makes Tuna a reliable keto staple.
Measure Your Ketone Levels
A blood ketone meter reads beta-hydroxybutyrate from a finger prick, the marker that defines nutritional ketosis at 0.5 to 3.0 mmol/L. Urine strips measure acetoacetate instead, which drops off once you are fat-adapted. Keto-Mojo makes a blood meter.
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