1 cup of peanut butter in grams
1 cup of peanut butter ≈ 258 g = 9.1 oz · 237 mL by volume · at 258 g per cup, spooned and leveled. Use the converter below for any amount or ingredient.
Result: …
Formula
grams = cups × 258 (peanut butter)
Why weight beats volume for peanut butter
A cup is a volume; a recipe cares about mass. Peanut butter runs about 258 g per US cup measured spoon-and-level, but packing, humidity, and grind can move that by ±10%. Weighing removes the guesswork, which is exactly why serious baking recipes list grams.
Peanut butter: cups to grams table
| Amount | Grams | Ounces |
|---|---|---|
| ¼ cup | 65 g | 2.28 oz |
| ⅓ cup | 86 g | 3.03 oz |
| ½ cup | 129 g | 4.55 oz |
| ⅔ cup | 172 g | 6.07 oz |
| ¾ cup | 194 g | 6.83 oz |
| 1 cup (this page) | 258 g | 9.1 oz |
| 1½ cups | 387 g | 13.65 oz |
| 2 cups | 516 g | 18.2 oz |
| 3 cups | 774 g | 27.3 oz |
Frequently asked questions
How many grams is 1 cup of peanut butter?
1 cup of peanut butter is about 258 g (9.1 oz), based on 258 g per US cup, measured spoon-and-level.
Why does the ingredient change the answer?
Cups measure volume, grams measure weight. Dense ingredients pack more weight into the same cup: a cup of honey is 340 g while a cup of rolled oats is only 90 g. That is why generic cup-to-gram converters get recipes wrong.
Does it matter how I fill the cup?
Yes, these figures assume you spoon the ingredient into the cup and level it off. Scooping, packing, or tapping the cup can change the weight by 10% or more, which is why bakers prefer a scale.
Is this a US cup or a metric cup?
A US customary cup (236.6 mL). A metric cup is 250 mL, about 5.7% bigger, and old UK recipes use a 284 mL imperial cup. 1 cup here is 237 mL by volume.