How many carbs are in peanuts?
Peanuts has 6 g of total carbs per 1 oz (28 g) — about 3.6 g net carbs after 2.4 g of fiber. That's 21.3 g of carbs per 100 g, roughly 2% of the 275 g Daily Value.
USDA FoodData Central · dry-roasted, unsalted · FDC 173806
Carbs by portion
| Portion | Total carbs | Net carbs | Fiber | Sugar | Calories |
|---|---|---|---|---|---|
| 1 oz (28 g) | 6 g | 3.6 g | 2.4 g | 1.4 g | 164 |
| 100 g | 21.3 g | 12.9 g | 8.4 g | 4.9 g | 587 |
| 1 oz (28 g) | 6 g | 3.6 g | 2.4 g | 1.4 g | 166 |
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 173806, SR Legacy). dry-roasted, unsalted.
Peanuts read like a low-carb food once you look past the total. A 1 oz serving (28 g) has about 6 g of total carbohydrate — that’s 21.3 g per 100 g — but a big share of it is fiber, which doesn’t count toward blood sugar. Subtract the 2.4 g of fiber in that ounce and the net carbs land at roughly 3.6 g. For a snack that’s so satisfying, that’s a genuinely low number, and it’s the reason peanuts show up on so many low-carb and keto plans.
Fiber is what makes the net carbs low
Net carbs are total carbs minus fiber, and peanuts have an unusually high fiber-to-carb ratio for the subtraction to work in your favor. Of the 21.3 g of total carbs per 100 g, about 8.4 g is fiber — nearly 40% of the carbohydrate — and only 4.9 g is sugar, with the rest mostly starch. So per 100 g the net carbs come out near 12.9 g, and at a realistic 1 oz portion you’re looking at only ~3.6 g net. Fiber is the carb you subtract because your body doesn’t digest it into glucose the way it does starch and sugar; combined with peanuts’ fat-forward profile, that’s why they read like a carb food on a label but barely register as one once the fiber comes out.
Why peanuts fit keto and low-carb plans
For keto, peanuts are a clear yes. About 3.6 g net carbs an ounce uses only a sliver of a strict 20 g daily budget, and the macro shape is ideal: nearly 14 g of fat in that same handful means peanuts deliver fat with minimal net carbs — exactly what a ketogenic plan is built around. On low-carb plans generally, peanuts are one of the easier snacks to fit, and their low glycemic impact means they don’t spike blood sugar the way a starchy snack would. The one thing to manage isn’t the carbs — it’s the calories, since at ~164 per ounce a doubled handful adds up fast. Walnuts run even lower on net carbs — about 2 g an ounce — so either is a sound low-carb pick; peanuts simply bring a touch more fiber per ounce to the table.
For the protein side of the same handful — and why peanuts contribute protein rather than provide it — see protein in peanuts.
Packaged nuts options, graded
Prefer something off the shelf? Here are the best-graded nuts in our catalog — each scored on our transparent Labelgrade. Check the carb line on each label for your goal.
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Labelgrade 79/100 · 6 g carbs · 6 g protein
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Frequently Asked Questions
How many carbs are in a 1 oz serving of peanuts?
About 6 g of total carbohydrate in a 1 oz serving (28 g), which is 21.3 g per 100 g (USDA FDC 173806). But 2.4 g of that ounce is fiber, so the net carbs come out to roughly 3.6 g — a low number that makes peanuts a popular low-carb snack.
What are the net carbs in peanuts?
About 3.6 g net carbs per 1 oz serving — total carbs (~6 g) minus the ~2.4 g of fiber. Fiber is the carb you subtract because it isn't digested into blood sugar. Per 100 g that's 21.3 g total carbs minus 8.4 g fiber, for roughly 12.9 g net (USDA FDC 173806).
Are peanuts keto-friendly?
Yes, very. At about 3.6 g net carbs per ounce — and with nearly 14 g of fat in that same handful — peanuts fit a strict 20 g keto budget comfortably and lean fat-forward, which is exactly the macro profile keto plans want. Watch the portion, since the calories add up, but the carbs won't be the problem.
Is the carbohydrate in peanuts sugar or fiber?
More fiber than sugar. Of the 21.3 g of total carbs per 100 g, about 8.4 g is fiber and only 4.9 g is sugar, with the rest mostly starch. That high fiber share is why peanuts' net carbs land so far below their total — a 1 oz handful nets only about 3.6 g.
Do peanuts spike blood sugar?
Not much. Peanuts are low in net carbs and high in fat, fiber, and protein, all of which slow digestion, so they have a low glycemic impact on their own. That's part of why a handful of peanuts — or peanuts paired with a higher-carb food — is often suggested to blunt a blood-sugar rise. This is general information, not medical advice.
When was this data last verified?
2026-06-18, against USDA FoodData Central FDC 173806 (Peanuts, all types, dry-roasted, without salt; SR Legacy). We re-verify reference pages periodically and update when USDA revises its data.
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.