One-Third Cup of Peanut Butter in Grams
1/3 cup of peanut butter weighs 86g (3.03 oz, 80ml) according to USDA FoodData Central (1 cup peanut butter = 258g, spooned and leveled method). 1/3 cup = 0.3333 of a full cup (240ml). See the full conversion table below for all amounts from 1 tablespoon to 3 cups.
Peanut Butter Cup-to-Gram Conversion Table
Full range from 1 tablespoon to 3 cups. The highlighted row shows 1/3 cup.
| Amount | Grams |
|---|---|
| 1 tbsp | 16.13g |
| 2 tbsp | 32.25g |
| 1/8 cup | 32.25g |
| 1/4 cup | 64.5g |
| 1/3 cupthis page | 86g |
| 1/2 cup | 129g |
| 2/3 cup | 172g |
| 3/4 cup | 193.5g |
| 1 cup | 258g |
| 1 1/4 cups | 322.5g |
| 1 1/2 cups | 387g |
| 1 3/4 cups | 451.5g |
| 2 cups | 516g |
| 2 1/2 cups | 645g |
| 3 cups | 774g |
Source: USDA FoodData Central (FDC ID: 16098). 1 US cup = 240ml. Values use spooned-and-leveled method.
1/3 Cup of Different Ingredients — Weight Comparison
1/3 cup of different ingredients varies widely in weight because each has a different density. This matters when substituting ingredients in recipes.
| Ingredient | 1/3 Cup (g) |
|---|---|
| Chopped Pecans | 36.33g |
| Chopped Walnuts | 40g |
| Cashews (whole) | 43.33g |
| Pine Nuts | 45g |
| Peanut Buttercurrent | 86g |
All values use USDA FoodData Central spooned-and-leveled method. Click any ingredient to see its full conversion table.
Measuring Peanut Butter Accurately
Why weight matters: 1/3 cup of peanut butter can weigh anywhere from 73g to 103g depending on how you measure it. The USDA standard is 86g (spooned and leveled). Scooping directly from the container can add 10–20% extra weight, which affects recipe results — especially in baking.
About peanut butter density: Peanut butter density depends heavily on style. Creamy/smooth: 1 cup = 258g. Natural peanut butter (oil separated): similar weight but harder to measure consistently. Crunchy adds variability. 2 tablespoons peanut butter = ~32g.
About 1/3 Cup as a Measurement
1/3 cup = 5 tablespoons + 1 teaspoon = 80ml. This unusual fraction appears in recipes that scale for 2 servings from a 3-serving base. It cannot be made from combining standard 1/4 and 1/8 cup measures without error.
One-third cup is common in yogurt parfait recipes, small-batch granola bars, and single-layer cake recipes scaled for 2 servings. It is exactly 80ml in metric volume.
Frequently Asked Questions
How many grams is 1/3 cup of peanut butter?
1/3 cup of peanut butter weighs 86 grams (3.03 oz, 80ml). Based on USDA FoodData Central: 1 cup peanut butter = 258g, so 1/3 cup = 258 × 0.333 = 86g.
Is 1/3 cup of peanut butter the same weight every time?
The weight can vary slightly depending on measuring technique. Spooned and leveled gives 86g. Scooped (packed) can be 10–20% heavier. Sifted gives a lighter weight. The USDA standard (spooned and leveled) of 86g is the most reliable baseline for recipes.
How do I accurately measure 1/3 cup of peanut butter?
For accuracy, use a kitchen scale and weigh 86g of peanut butter. If using measuring cups, spoon the peanut butter lightly into a 1/3 Cup measuring cup and level off the top with a straight edge. Avoid scooping directly from the container, which compacts the ingredient and adds extra weight.
How does 1/3 cup of peanut butter compare to other ingredients?
1/3 cup of different ingredients varies significantly: Chopped Pecans = 36.33g, Chopped Walnuts = 40g, Cashews (whole) = 43.33g. This is because each ingredient has a different density.