Grams to Cups: Peanut Butter
If your recipe is written in cups but your scale reads grams — or the other way round — this page solves the conversion for peanut butter. One cup of peanut butter weighs about 258 grams, which works out to a density of 1.09 g/ml. From there, half a cup is roughly 129 g, a quarter cup about 65 g, and one tablespoon about 16 g.
Converting between weight and volume depends on density, and density is specific to each ingredient: a cup of peanut butter does not weigh the same as a cup of flour or sugar. That is why this tool uses the measured density of peanut butter, taken from the USDA FoodData Central database, rather than a one-size-fits-all figure.
Cooking measurement converter — Peanut Butter
Result
0.388 cups
Common measures — Peanut Butter
| Measure | Grams |
|---|---|
| 1 cup | 258 g |
| ¾ cup | 194 g |
| ½ cup | 129 g |
| ⅓ cup | 86 g |
| ¼ cup | 65 g |
| 1 tbsp | 16 g |
| 1 tsp | 5.4 g |
Data source: USDA FoodData Central
How to measure peanut butter accurately
For peanut butter, spoon it into the cup and level it off; do not shake or tap the cup, which settles the contents and changes the weight. Weighing in grams is still the most reliable method when the amount matters.
Frequently asked questions
How many grams are in a cup of peanut butter?
One cup of peanut butter weighs about 258 grams. Half a cup is roughly 129 grams and a quarter cup about 65 grams.
How many cups is 100 grams of peanut butter?
100 grams of peanut butter is about 0.39 cups. Use the calculator above for any other amount.
Where does this value come from?
From the ingredient's measured density (1.09 g/ml), referenced to the USDA FoodData Central database. Bear in mind the real weight can vary slightly with brand and moisture.
Last updated: