Peanut butter is dense and sticky, so measuring it by cups can be messy and a little inconsistent. One US cup of peanut butter is commonly estimated at about 258 grams.
This converter is useful when a recipe gives peanut butter in cups but you want to weigh it directly into a bowl, or when a recipe lists grams and you want the approximate cup amount.
Quick Peanut Butter Conversion Reference
These common peanut butter measurements are based on 1 cup = 258g. Use them for quick recipe checks before using the full chart below.
Peanut Butter Cups to Grams Conversion Chart
Use this chart when a recipe lists peanut butter in cups and you want to measure it in grams. The grams are based on 1 cup of peanut butter = 258g. Tablespoons and teaspoons are included as helpful references for smaller measurements.
| Cups | Grams | Tablespoons | Teaspoons |
|---|---|---|---|
| 1/8 cup | 32g | 2 tbsp | 6 tsp |
| 1/4 cup | 65g | 4 tbsp | 12 tsp |
| 1/3 cup | 86g | 5.3 tbsp | 16 tsp |
| 1/2 cup | 129g | 8 tbsp | 24 tsp |
| 2/3 cup | 172g | 10.7 tbsp | 32 tsp |
| 3/4 cup | 194g | 12 tbsp | 36 tsp |
| 1 cup | 258g | 16 tbsp | 48 tsp |
| 1.25 cups | 323g | 20 tbsp | 60 tsp |
| 1.5 cups | 387g | 24 tbsp | 72 tsp |
| 1.75 cups | 452g | 28 tbsp | 84 tsp |
| 2 cups | 516g | 32 tbsp | 96 tsp |
| 2.5 cups | 645g | 40 tbsp | 120 tsp |
| 3 cups | 774g | 48 tbsp | 144 tsp |
| 4 cups | 1032g | 64 tbsp | 192 tsp |
| 5 cups | 1290g | 80 tbsp | 240 tsp |
Peanut Butter Grams to Cups Conversion Chart
Use this chart when your recipe gives peanut butter in grams but you want to understand the approximate cup measurement. To calculate peanut butter grams to cups, divide the grams by 258. For example, 100g of peanut butter is about 0.39 cups.
| Grams | Cups | Tablespoons | Teaspoons |
|---|---|---|---|
| 10g | 0.04 cups | 0.6 tbsp | 1.9 tsp |
| 20g | 0.08 cups | 1.2 tbsp | 3.7 tsp |
| 25g | 0.10 cups | 1.6 tbsp | 4.7 tsp |
| 30g | 0.12 cups | 1.9 tbsp | 5.6 tsp |
| 40g | 0.16 cups | 2.5 tbsp | 7.4 tsp |
| 50g | 0.19 cups | 3.1 tbsp | 9.3 tsp |
| 75g | 0.29 cups | 4.7 tbsp | 14 tsp |
| 100g | 0.39 cups | 6.2 tbsp | 18.6 tsp |
| 125g | 0.48 cups | 7.8 tbsp | 23.3 tsp |
| 150g | 0.58 cups | 9.3 tbsp | 27.9 tsp |
| 175g | 0.68 cups | 10.9 tbsp | 32.6 tsp |
| 200g | 0.78 cups | 12.4 tbsp | 37.2 tsp |
| 225g | 0.87 cups | 14 tbsp | 41.9 tsp |
| 250g | 0.97 cups | 15.5 tbsp | 46.5 tsp |
| 300g | 1.16 cups | 18.6 tbsp | 55.8 tsp |
| 350g | 1.36 cups | 21.7 tbsp | 65.1 tsp |
| 400g | 1.55 cups | 24.8 tbsp | 74.4 tsp |
| 450g | 1.74 cups | 27.9 tbsp | 83.7 tsp |
| 500g | 1.94 cups | 31 tbsp | 93 tsp |
How to Convert Peanut Butter Cups to Grams
To convert peanut butter from cups to grams, multiply the number of cups by 258. This page uses 1 cup of peanut butter = 258 grams, which is a practical average for everyday baking.
grams = cups x 258 For example, if a recipe calls for 2 cups of peanut butter, the calculation is 2 x 258 = 516 grams. If it calls for 1/2 cup, the calculation is 0.5 x 258 = 129 grams.
How to Convert Peanut Butter Grams to Cups
To convert peanut butter from grams to cups, divide the gram amount by 258. This is useful when a recipe gives metric measurements but you want an approximate cup measurement.
cups = grams / 258 For example, 100g of peanut butter is 100 / 258 = 0.39 cups. This is close to 6.2 tablespoons. Grams are still more reliable than cups because small measuring differences can change the texture of the final recipe.
Why Peanut Butter Cup Weight Can Vary
Peanut butter thickness changes by brand and style. Natural peanut butter with separated oil can measure differently from fully blended creamy peanut butter.
Chunky peanut butter can also vary because peanut pieces create small spaces in the cup. This calculator uses 258g per cup as a practical average for creamy peanut butter and most everyday recipes.
How to Measure Peanut Butter Accurately
The cleanest way to measure peanut butter is with a digital kitchen scale. Place your bowl on the scale, tare it to zero, and spoon in peanut butter until you reach the gram amount.
If you use cups, press peanut butter gently into the measuring cup and level the top. A flexible spatula helps scrape out the cup so less peanut butter is left behind.
For natural peanut butter, stir it very well before measuring. Oil separation can make the top looser and the bottom thicker, which changes texture and weight.
Peanut Butter Baking Notes
Peanut butter adds fat, protein, flavor, and thickness. In cookies and bars, the exact amount can change spread, chewiness, and crumb texture.
Peanut butter is not the same as butter, oil, or powdered peanut butter. If you substitute, the recipe may need different liquid or fat adjustments.
When using peanut butter with honey, brown sugar, or chocolate chips, weighing the sticky or dense ingredients can keep the batter more consistent.
Peanut Butter vs Other Spreads
Peanut butter is much denser than many liquid ingredients. A cup of peanut butter weighs about 258g, while a cup of milk is much lighter and honey is heavier.
Creamy and chunky peanut butter can be close, but they are not always identical by cup. Natural peanut butter may also change after stirring.
Use this peanut butter conversion when the recipe specifically calls for peanut butter. Other nut butters can be similar but may vary by brand and texture.
Frequently Asked Questions
How many grams in a cup of peanut butter?
One US cup of peanut butter is approximately 258 grams. This calculator uses 258g per cup as a practical average.
How many grams is 1/2 cup of peanut butter?
One half cup of peanut butter is approximately 129 grams, based on 258g per cup.
How many cups is 100g of peanut butter?
100 grams of peanut butter is approximately 0.39 cups, or about 6.2 tablespoons.
Is this for creamy or chunky peanut butter?
This calculator works best as a practical average for creamy peanut butter. Chunky peanut butter can vary slightly because of peanut pieces.
Should natural peanut butter be stirred before measuring?
Yes. Stir natural peanut butter well before measuring so the oil and solids are evenly mixed.
Can I use this conversion for peanut butter cookies?
Yes, this conversion is useful for peanut butter cookies and bars. Weighing peanut butter helps keep texture more consistent.
Conclusion
For most recipes, you can estimate peanut butter at 258 grams per US cup. That means 1/2 cup is about 129g, 1 cup is 258g, and 2 cups is 516g.
Use the calculator above for quick peanut butter conversions, then use the charts and measuring notes on this page when you need a complete cups and grams reference.
More Butter Conversion Calculators
Use the matching calculator when your recipe uses a different baking fat because cup weights and measuring methods can change. See the full category on the Food Conversion page.
Sugar Conversion Calculators
You may also need flour and sugar measurements when adjusting baking recipes.