Carbs in black beans
Per 1 cup cooked (172 g)
41g
Total carbs
15g
Fiber
26g
Net carbs
0g
Sugars
Values are typical for the stated serving, consistent with USDA FoodData Central; brands and preparations vary. GI reference: glucose = 100.
What black beans actually does
Black beans are what slow carbs actually look like: 41 g of total carbs per cup sounds like a lot, but 15 g of that is fiber, another 15 g is protein riding along, and the starch itself is the resistant, slow-digesting kind — GI around 30. The result is one of the flattest curves of any carb-heavy food, a long gentle slope instead of a spike. Many T1s find beans almost boringly predictable, which is the highest compliment a food can get. They also blunt whatever they are eaten with: rice and beans together produces a slower curve than the rice alone would.
Slow and flat — a long, gentle rise that can take 90+ minutes to crest.
Worth trying
Beans are the pairing — adding them to rice, tacos, or soups slows the whole meal down. Canned works fine; a quick rinse cuts the sodium.
Common questions
Are black beans good for diabetics?
They are one of the best carb sources available: massive fiber, real protein, and a GI around 30 producing a slow, flat rise. A cup is about 26 g of net carbs, but they arrive so gradually that most people find beans among their most predictable foods.
Do I count total carbs or net carbs for beans?
This is genuinely individual — beans have so much fiber (15 g per cup) that the gap between total and net carbs is big, and people differ in which number matches their actual response. Watch your own curve after a known portion, and it is a good specific question for your care team.
Related foods
Real quick — we’re not your doctor. Everything on this page is general information, not medical advice, and diabetes is deeply individual. CarbLens AI never recommends insulin doses. Use what you learn here to have smarter conversations with your care team.
See what black beans does to YOUR blood sugar.
Averages are averages. CarbLens AI logs your meal and shows the 3-hour curve your own body produced.
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