How much fiber is in peanuts?

Peanuts are one of the more fiber-rich nuts you can snack on, and the fiber comes free with everything else you reach for them for. A standard 1 oz serving (28 g) carries about 2.4 g of fiber — roughly 9% of the 28 g Daily Value — from 8.4 g per 100 g. That’s a genuine fiber payload for something you can keep in a desk drawer and eat by the handful, with no prep and no cooking. Peanuts aren’t a single-food fix for the whole day’s fiber, but a measured handful is a reliable contributor that arrives packaged with protein and heart-healthy fat.

A high-fiber nut that travels well

What makes peanuts useful is that the fiber rides along with the fat and protein you snack them for. Most of a peanut’s fiber is insoluble — the kind that adds bulk and supports regularity — with a smaller soluble share that slows digestion and feeds gut bacteria. Paired with the nut’s monounsaturated fat, that fiber is part of why a handful is genuinely filling and steadies hunger between meals rather than spiking and crashing it. On the fiber scale, peanuts sit toward the top of the nut bowl: their 8.4 g per 100 g beats walnuts’ 6.7 g, though almonds run higher at about 12.5 g. The practical takeaway is that an ounce of peanuts is a smarter fiber move than most people give it credit for.

There’s a carb-counting angle, too. An ounce of peanuts has about 6 g of total carbohydrate, but 2.4 g of that is fiber — so the net carbs land around 3.6 g. Fiber is the carb you subtract, because it isn’t digested into blood sugar the way starch and sugar are. Combined with their fat-forward profile, that low net-carb number is exactly why peanuts are a staple low-carb and keto snack.

Using peanuts to hit your fiber goal

The case for peanuts is leverage: most people eat only about half the 28 g daily fiber target, and a measured handful is one of the easiest add-ons to close part of that gap. Scatter an ounce over Greek yogurt or oatmeal, fold them into a stir-fry or grain bowl, or keep a portioned bag on hand as a standalone snack — each move quietly adds ~2.4 g. The one discipline peanuts ask for is portion control, since the calories climb fast; a small cupped handful is the right measure for ~2.4 g of fiber at ~164 calories. Almonds bring even more fiber per ounce if that’s your priority, but peanuts hold their own and tend to be the cheaper option.

Peanuts bring protein and healthy fat along with that fiber. For the protein side of the picture, see protein in peanuts.