How many carbs are in pinto beans?
Pinto beans has 17.8 g of total carbs per 1/2 cup (88 g) — about 13 g net carbs after 4.8 g of fiber. That's 20.2 g of carbs per 100 g, roughly 6% of the 275 g Daily Value.
USDA FoodData Central · canned, drained · FDC 174286
Carbs by portion
| Portion | Total carbs | Net carbs | Fiber | Sugar | Calories |
|---|---|---|---|---|---|
| 1/2 cup (88 g) | 17.8 g | 13 g | 4.8 g | 0.4 g | 100 |
| 100 g | 20.2 g | 14.7 g | 5.5 g | 0.5 g | 114 |
| 1 oz (28 g) | 5.7 g | 4.1 g | 1.6 g | 0.1 g | 32 |
Net carbs = total carbs − fiber (the carbs that raise blood sugar, used in keto/low-carb tracking). Values computed from USDA per-100 g data (FDC 174286, SR Legacy). canned, drained.
A 1/2 cup of canned pinto beans (88 g) holds about 17.8 g of total carbohydrate, but the figure that matters for keto, low-carb and diabetes tracking — net carbs — is noticeably lower at roughly 13.0 g. The difference is fiber: pinto beans bring about 4.8 g of fiber in that half-cup, and fiber is carbohydrate the body doesn’t digest into glucose. Per 100 g the total is 20.2 g of carbs, including 5.5 g of fiber, so net comes to 14.7 g per 100 g. The burrito-and-refried-bean staple is a slower, lighter carb than its total suggests.
Why net carbs come in so much lower
A refined starch — white rice, a flour tortilla — carries almost no fiber, so net carbs ≈ total and nearly every gram reaches your bloodstream. Pinto beans flip that: close to a quarter of their carbohydrate is fiber, the part subtracted to reach net and the part that doesn’t raise blood sugar. That’s how a 17.8 g total becomes a 13.0 g net per half-cup. The same fiber that drops the net number also slows digestion, so the rest of the carbohydrate releases gradually instead of spiking — pinto beans are a low-glycemic food, which is exactly why they sit at the center of so many diabetic-friendly and Mediterranean-style plates.
How pinto beans fit a low-carb plan
For strict keto (20–50 g net carbs a day), pintos are workable but not cheap on the budget: a half-cup at 13.0 g net is a real share, and a full cup roughly doubles it toward 26 g. On a flexible low-carb or diabetic-friendly plan they fit far more easily, because the fiber means you’re buying a filling, protein-bearing, almost fat-free food for fewer net carbs than the headline total — a better deal per gram than the rice or tortilla they usually ride with. Read them as a slow carb: a portion-controlled scoop alongside protein and vegetables behaves nothing like a refined-starch side of the same carb count, and refried pintos count the same way as whole.
For the protein side of the picture, see protein in pinto beans — and with any canned or refried version you’re tracking, check the label’s own total carb and fiber lines so you can run the net-carb subtraction yourself.
Frequently Asked Questions
How many carbs are in a 1/2 cup of pinto beans?
About 17.8 g of total carbohydrate in a 1/2 cup serving of canned, drained pinto beans (88 g), which is 20.2 g per 100 g (USDA FDC 174286). That total includes 4.8 g of fiber, so net carbs — the number used for keto and low-carb tracking — are lower, around 13.0 g per 1/2 cup.
What are the net carbs in pinto beans?
Roughly 13.0 g net carbs per 1/2 cup — total carbs (17.8 g) minus fiber (4.8 g). Pinto beans carry a lot of fiber for their size, so net lands well under total, unlike a refined starch where the two are nearly equal. That heavy fiber load is also why beans are a slow, steady carb rather than a fast one.
Are pinto beans keto or low-carb?
On strict keto, generally no — 13.0 g net carbs in a 1/2 cup, and roughly 26 g in a full cup, eats a large part of a 20–50 g daily limit. On a flexible low-carb plan they fit better: the fiber means a filling, cheap, nearly fat-free food for fewer net carbs than the total implies. Refried or whole, pintos are a slow carb, not a no-carb.
Do pinto beans spike blood sugar?
Far less than the rice or tortillas they're served with. Pinto beans are low-glycemic: the ~4.8 g of fiber per 1/2 cup plus their protein slows digestion, so the carbohydrate releases gradually instead of spiking. That gentler curve is why beans are a staple of diabetic-friendly and Mediterranean eating — portion size and what you pair them with still count.
Why does the fiber in pinto beans matter for carbs?
Fiber is carbohydrate the body doesn't break down into glucose, so it's subtracted to get net carbs and doesn't raise blood sugar. Pinto beans hold about 5.5 g of fiber per 100 g — close to a quarter of their total carbohydrate — which is what turns a ~18 g total into a ~13 g net per half-cup and keeps the blood-sugar impact mild.
When was this data last verified?
2026-06-04, against USDA FoodData Central FDC 174286 (Beans, pinto, canned, drained solids; SR Legacy). We re-verify reference pages periodically and update when the underlying USDA entry changes.
Whole-food values are USDA reference data, not a Labelgrade (that score is for branded packaged products). See our methodology and the macro calculator to turn this into a daily target.