Not Keto
Lentils
12.10g net carbs per 1/2 cup cooked
Half a cup serves up 12.1 g net carbs, which can eat most or all of a strict keto day's budget in one go. Tasty as they are, lentils are dense enough in carbs that they belong on the avoid list for keto.
Built by Barron Hansen · 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 61% of your 20g daily budget.
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Good to Know
Green and brown varieties hold their shape after cooking, while red and yellow ones cook down into a thicker puree, but the carb load stays high across all of them. Restaurant dal and lentil soups often add potatoes, rice, or a sugar-sweetened tomato base, which pushes the count even higher than the plain cooked numbers suggest. If you want that earthy, savory note without the carb hit, a small spoonful as a garnish does far less damage than a full half-cup serving.
Is Lentils Keto? The Full Answer
Lentils contains 12.10g net carbs per 1/2 cup cooked (19.90g total carbs minus 7.80g fiber). Half a cup serves up 12.1 g net carbs, which can eat most or all of a strict keto day's budget in one go. Tasty as they are, lentils are dense enough in carbs that they belong on the avoid list for keto.
On a standard ketogenic diet, most people target 20-25g net carbs per day. A single serving uses 61% of a 20g daily carb limit. If you are following a strict ketogenic protocol, reach for a lower-carb option instead.
Better Keto Swaps
Cooked black soybeans are the closest stand-in. A 1/2 cup runs about 1 g net carbs, and the firm texture and protein hold up well in stews and chili where you would normally use lentils. Want something with that earthy, hearty feel? Try cauliflower (about 1.5 g net carbs per 1/2 cup cooked). It soaks up spices like cumin and turmeric and gives you bulk without the 12.1 g of net carbs you get here. For a soup base or a side with bite, mushrooms work too, at roughly 1 g net carbs per 1/2 cup. They bring a savory, meaty quality that pairs nicely with onion and garlic.
Track Your Ketone Levels
The Keto-Mojo meter is the gold standard for confirming you're actually in ketosis. Know your numbers - don't guess.