A 16 oz bag of peanuts holds about 3.2 cups. Shelled peanuts weigh about 142 g per cup — the same as almonds — so a pound bag gives just over three cups. The 16 oz bag is the standard size for cooking, and three cups covers a satay sauce, a brittle and a salad topping with peanuts to spare. Note that this figure is for shelled peanuts: a bag of peanuts in the shell weighs far more per cup of edible nuts.
How many cups in a 16 oz bag?
A 16 oz bag of peanuts holds about 3.2 cups (454 g ÷ 142 g per cup).
| Amount | Cups | Grams | Tablespoons |
|---|---|---|---|
| Full 16 oz bag | 3.2 | 454 | 51 |
| Half 16 oz bag | 1.6 | 227 | 26 |
| Quarter 16 oz bag | 0.8 | 113.5 | 13 |
| 1 tablespoon | 0.06 | 8.88 | 1 |
The table gives the full package, half a package and a quarter of a package, plus a single tablespoon, so you can scale the answer to whatever your recipe asks for. If your packet is a different size from the one on this page, the same per-cup figure still applies — divide your packet's weight by the grams per cup, or its volume by 236.6 ml per cup, and you have your answer.
Worked examples
Satay sauce that needs a cup
A bowl of satay sauce takes about 1 cup of peanuts — 142 g — ground or blended with 1/4 cup of soy sauce, 2 tablespoons of lime juice and a tablespoon of chilli paste. Grind the peanuts yourself rather than using peanut butter: the texture is coarser and the flavour fresher. One cup is just under a third of the bag, so a single bag makes about three bowls of sauce. Toast the peanuts lightly before grinding for a deeper, roast flavour.
Peanut brittle that needs a cup and a half
A tray of peanut brittle takes about 1 and a half cups of peanuts — 213 g — stirred into a caramel made from 1 cup of sugar, 1/2 cup of corn syrup and 2 tablespoons of butter. A cup and a half is just under half the bag, leaving about 1.7 cups for another batch or for snacking. Add the peanuts to the caramel off the heat and work fast: the caramel sets within a minute, and peanuts added late do not distribute evenly. Spread the brittle thin on a buttered tray.
Salad topping that needs half a cup
A large salad for six takes about 1/2 cup of peanuts — 71 g — roughly chopped and scattered over the top with herbs and a lime dressing. Half a cup is about a sixth of the bag, so one bag tops about six salads. Chop them coarsely rather than finely: fine pieces disappear into the dressing, while coarse pieces give the crunch the salad needs. Salted peanuts work here, but taste the dressing before adding extra salt.
How the figure was measured
The weight figure on this page comes from King Arthur Baking: peanuts weighs 142 g per cup, measured spooned and levelled, and that figure carries high confidence in CookScale's 120-ingredient table. Every cup-based result on this page is approximate, because a cup measures volume and the weight depends on how the ingredient settles, how it was measured, and how fresh it is. When the amount matters — a cake, a cheesecake, a sauce that must set — weigh the ingredient on a kitchen scale instead of trusting the cup. Package sizes vary by brand and region, so check the weight printed on your own packet before planning a recipe around this page.
How to measure it
Nuts are spooned into a dry cup measure and levelled, never packed — pressing them down crushes the pieces and fits far more weight into the same cup. Whole nuts, halves and chopped pieces all measure differently in the same cup: a cup of whole almonds weighs more than a cup of chopped almonds, because the pieces settle differently and the air gaps change. That is why the weight figures on this page are the anchor, not the cup. If a recipe says '1 cup chopped walnuts', chop first and then measure; if it says '1 cup walnuts, chopped', measure first and then chop. The difference is real — about a quarter of a cup in a batch of brownies. When it matters, weigh: 142 g of almonds is 142 g however you chop them.
Practical guidance
Nuts go rancid faster than almost anything else in the pantry because their oils are exposed to air. A bag opened in January and still sitting in a warm cupboard in June will taste stale and a little bitter, and no recipe can hide it. Store opened nuts in a sealed jar in the fridge, or in the freezer for months — they thaw in minutes and toast straight from frozen. Taste one before baking with an old bag: fresh nuts taste sweet and clean, stale ones taste like old oil. Toasting revives nuts that are merely flat, but it cannot rescue ones that have turned. Buy smaller bags more often rather than one huge bag that sits open.
Three cups plus a little is the figure, and the shelled-versus-in-shell distinction is the trap: a bag of peanuts in the shell looks the same size but yields half the nuts. Check the label — 'shelled', 'shelled and roasted', or 'in shell' — before you measure. The bag size is the other variable: 12 oz bags hold about 2.4 cups and 32 oz bags about 6.4 cups, and the same 142 g per cup applies throughout. And remember that roasted peanuts weigh the same per cup as raw ones, so the figure holds whether your bag is raw, roasted, salted or unsalted.
Frequently asked questions
How many tablespoons are in a 16 oz bag of peanuts?
There are about 51 tablespoons in a 16 oz bag of peanuts, because the bag holds about 3.2 cups and there are 16 tablespoons in a cup. A tablespoon of shelled peanuts weighs about 8.9 g. For a salad topping, 2 tablespoons per serving is the usual amount, so a bag covers roughly two dozen servings.
Are peanuts in the shell the same as shelled peanuts?
No. A cup of peanuts in the shell weighs far less in edible nuts — the shells take up most of the space and most of the volume. The figure on this page, 142 g per cup, is for shelled peanuts only. A pound of peanuts in the shell yields roughly half a pound of shelled nuts, so do not use this page's figures for a bag of in-shell peanuts.
Can I substitute peanuts for almonds cup-for-cup?
Yes. Peanuts and almonds both weigh about 142 g per cup, so a cup-for-cup swap is exact by weight as well as by volume. The flavour is different — peanuts are earthier and sweeter, almonds are milder — but in a granola, a brittle or a sauce the measure does not change. The same applies to hazelnuts, which also weigh 142 g per cup.
How long does an opened bag of peanuts last?
An opened bag of peanuts lasts about three months in a cool cupboard and six months in the fridge. Store them in a sealed jar, not the open bag, and keep them away from heat. Salted peanuts last slightly longer than unsalted because the salt draws out moisture, but they still go rancid. Taste one before cooking: fresh peanuts taste sweet and clean, stale ones taste bitter and oily.
Should I use salted or unsalted peanuts for cooking?
Unsalted, unless the recipe says otherwise. Salted peanuts add an unknown amount of salt — about a quarter of a teaspoon per half cup, roughly — which throws off a recipe that is already seasoned. If you only have salted peanuts, reduce the salt in the rest of the recipe by a pinch. For snacking and salad toppings, salted peanuts are fine and need no adjustment.