1/2 Cup Walnuts in Grams
1/2 cup of walnuts weighs 56.5 g (spooned and levelled, King Arthur Baking). Chopped walnut pieces with a rich, slightly bitter flavour. All the figures on this page are approximate conversions based on the King Arthur Baking value, so when a recipe really matters, verify with a kitchen scale. Walnuts are the nut with the most personality: bitter, earthy and rich all at once, which is why a half cup of them can carry a whole salad, a banana bread or a pesto, and why getting the amount right matters more than with a milder nut.
Why half a cup of walnuts is a useful amount
Half a cup of walnuts is the amount that shows up in a batch of cookies, a tray of granola or a handful of trail mix, and it is also the amount where the cup starts to mislead you. Whole and chopped nuts do not pack the same way twice: the gaps between the pieces change with the size of the chop, the shape of the nut and how settled the bag is. A level half cup of chopped walnuts can weigh several grams more or less than the same volume of whole ones, and that swing matters when nuts are the expensive ingredient in the recipe. Brownies, salads, pesto and banana bread. The table below is built from the published King Arthur Baking weight for walnuts measured spooned and levelled, so you can weigh a batch once and repeat it exactly.
Walnuts cups to grams conversion table
| Cups | Grams | Tablespoons (approx.) |
|---|---|---|
| 1/4 cup | 28.2 g | 1.8 g |
| 1/3 cup | 37.7 g | 2.4 g |
| 1/2 cup | 56.5 g | 3.5 g |
| 2/3 cup | 75.3 g | 4.7 g |
| 3/4 cup | 84.8 g | 5.3 g |
| 1 cup | 113 g | 7.1 g |
| 1 1/2 cups | 169.5 g | 10.6 g |
| 2 cups | 226 g | 14.1 g |
| 3 cups | 339 g | 21.2 g |
| 4 cups | 452 g | 28.2 g |
The tablespoon column is a bonus for recipes that call for a spoonful or two: one tablespoon of walnuts weighs about 7.1 g, and one teaspoon about 2.4 g. A cup is 16 tablespoons, so the numbers in the table are just the cup weight divided by 16, rounded to one decimal place. For small amounts a scale that reads to the gram is far more reliable than a spoon, because a heaped tablespoon can weigh half as much again as a level one.
How the weight was measured
Spooned and levelled means spooning the ingredient into the measuring cup until it is heaped, then sweeping a straight knife across the top to level it off. Never scoop the cup through the bag or jar, and never tap the cup down, because both pack the ingredient and add weight.
The source for the 113 g figure is King Arthur Baking, and the confidence in the value is high. King Arthur Baking publishes a standard ingredient weight chart that recipe developers use as a reference, and this page follows it exactly rather than averaging across sources, because an average of two different measuring methods is a number that matches nobody's cup.
Worked examples
A banana bread for a bake sale
A banana bread doubled for a bake sale calls for 1/2 cup of chopped walnuts, which is 56.5 g. The walnuts have to be weighed after chopping, because chopped walnuts pack tighter than whole ones. Weighing 56.5 g keeps the loaf studded without being overloaded, and tossing the pieces in flour before folding them in stops them sinking to the bottom.
A walnut pesto for a dinner party
A walnut pesto for twelve people uses 1/2 cup of walnuts, which is 56.5 g, blended with basil, parmesan and olive oil. The walnuts replace pine nuts and give the pesto a deeper, earthier flavour. Weighing 56.5 g keeps the pesto thick enough to coat pasta without being gritty, and toasting the walnuts first removes the bitter edge from their skins.
A salad for a crowd
A salad for a buffet uses 1/2 cup of walnut halves, which is 56.5 g, scattered over bitter leaves, blue cheese and pears. The walnuts are the crunch in the dish, so the weight decides whether every serving gets some or only the first few plates do. Weighing 56.5 g keeps the salad balanced, and the walnuts should be toasted and cooled before they go on, or they soften in the dressing.
When this conversion matters most
This conversion matters most when nuts are the expensive ingredient or the structural one. In a cookie, the weight of walnuts decides whether the dough holds together or crumbles; in granola, it decides the ratio of crunch to oats; in a cake, it decides whether the crumb is studded or overloaded. A cup measure hides all of that behind the air gaps between the pieces, so two bakers following the same recipe with cups can end up with visibly different results. Weighing removes the guesswork and, just as usefully, tells you exactly how much of an expensive ingredient a recipe really needs.
Common mistakes with walnuts
- Mixing whole and chopped weights. Chopped nuts pack tighter than whole ones, so a half cup of chopped walnuts weighs more than a half cup of whole. Use the weight for the form the recipe actually calls for, and chop after weighing when you can.
- Scooping from the bag. Scooping compresses the pieces and traps fewer air gaps, so the cup holds more than a spooned, levelled measure. Spoon the nuts in and level them off.
- Skipping the scale for an expensive ingredient. Nuts are the priciest item in most baking. Weighing tells you the true cost of a batch and stops you pouring in a generous extra handful that the recipe never asked for.
- Storing nuts where they go stale. Nuts go rancid in a warm cupboard, and stale nuts weigh the same but taste of nothing. Keep them sealed and cool so the weight you measure is the flavour you expect.
Storage and handling
Refrigerate or freeze; walnut oils turn rancid quickly. Keeping walnuts stored properly also keeps its weight per cup stable: an ingredient that has absorbed moisture from the air weighs more per cup than a dry one, so a sealed container is not just about freshness, it is about measurement accuracy too. If a bag has been open for months in a humid kitchen, the first thing to do before a precise bake is to weigh the ingredient rather than trusting the cup.
Frequently asked questions
How many grams is 1/2 cup of walnuts?
1/2 cup of walnuts weighs 56.5 g, measured spooned and levelled according to King Arthur Baking. That is the figure to use when converting a recipe from cups to grams, and it is the value the conversion table on this page is built on.
How do I measure walnuts without a scale?
Spooned and levelled means spooning the ingredient into the measuring cup until it is heaped, then sweeping a straight knife across the top to level it off. Never scoop the cup through the bag or jar, and never tap the cup down, because both pack the ingredient and add weight. That gives the closest result to 56.5 g per half cup, but it is still an estimate: the honest answer is that a scale is the only way to know the exact weight, and a basic digital kitchen scale costs less than a bag of good flour.
Does walnuts always weigh the same per cup?
No. Brand, grind, moisture and how settled the container is all shift the weight by a few grams, and for some ingredients the swing can be much larger. The 113 g figure is the standard King Arthur Baking value for walnuts measured spooned and levelled, and it is the right default, but when a recipe is precise, weigh the ingredient and trust the scale over the cup.
Can I use the same conversion for a different brand of walnuts?
Yes, as a starting point. The 113 g figure is a standard average for walnuts, and most brands sit within a few grams of it. If you cook with one brand all the time, weigh one cup of it once and note the number on the bag, and you will have a conversion tuned to your own kitchen.
Why do my walnuts taste bitter?
The bitterness lives mostly in the thin brown skin, and it gets stronger when walnuts are stale or stored warm. Toasting the weighed 56.5 g in a dry pan for a few minutes mellows the bitterness and brings out the nutty flavour. If the bitterness survives toasting, the walnuts are probably old: buy them in small amounts, keep them sealed in the fridge, and taste before you bake with them.
How should I store walnuts?
Refrigerate or freeze; walnut oils turn rancid quickly. Good storage keeps the ingredient fresh and keeps its weight per cup consistent, because moisture absorbed from the air adds grams that the recipe did not ask for.
Related conversions
Use the cups to grams converter, tablespoons to grams converter, weight converter, recipe scaler for instant answers, or browse the cups to grams hub for the full ingredient list. Related pages: Peanut Butter in cups to grams, Rolled Oats in cups to grams, Cocoa Powder in cups to grams. See also our disclaimer about approximate conversions.