Kitchen Density Converter
Peanut Butter: Cups to Grams Conversion
Exact weight conversions, volume-to-mass ratios, and baking guidelines for peanut butter.
One US customary cup of Peanut Butter weighs approximately 250 grams (or 8.8 oz) when using the professional spoon-and-level measurement method. One level tablespoon weighs 16 grams.
Convert Peanut Butter Volume to Weight
Peanut Butter Measurement Chart
Complete volumetric to gravimetric equivalent table for common baking measurements.
| Volume (US Cups) | Grams (g) | Ounces (oz) | Equivalent Tablespoons |
|---|---|---|---|
| 1/8 cup (2 tbsp) | 31.3 g | 1.10 oz | 2 tbsp |
| 1/4 cup (4 tbsp) | 62.5 g | 2.20 oz | 4 tbsp |
| 1/3 cup (5 tbsp + 1 tsp) | 83.3 g | 2.94 oz | 5.3 tbsp |
| 1/2 cup (8 tbsp) | 125 g | 4.41 oz | 8 tbsp |
| 2/3 cup | 166.7 g | 5.88 oz | 10.7 tbsp |
| 3/4 cup (12 tbsp) | 187.5 g | 6.61 oz | 12 tbsp |
| 1 cup (16 tbsp) | 250 g | 8.82 oz | 16 tbsp |
| 1 1/2 cups | 375 g | 13.23 oz | 24 tbsp |
| 2 cups | 500 g | 17.64 oz | 32 tbsp |
| 3 cups | 750 g | 26.46 oz | 48 tbsp |
How to Measure Peanut Butter Accurately
Pack it firmly into a dry cup with a spatula, working out the air pockets, then level — peanut butter is the rare ingredient where pressing in is correct, because voids are the enemy. Natural, separated peanut butter should be stirred first; un-stirred, a cup can be half oil by volume and the recipe inherits the error.
Storing Peanut Butter & Common Substitutes
Storage
Commercial (stabilized) jars: pantry 3 months after opening, then refrigerate. Natural peanut butter: refrigerate always — the oil oxidizes within weeks at room temperature. Either kind will not hurt you when old, but rancid peanut butter tastes like cardboard and smells like old crayons.
Substitutions
Almond butter and cashew butter swap 1:1. Sunflower seed butter is the nut-free 1:1 (its green reaction with baking soda is harmless). For cookies, 1 cup of peanut butter ≈ 250 g — replace by weight, not volume, with tahini for a sesame version.
Frequently Asked Questions
How many grams is 1 cup of peanut butter?
One US cup of peanut butter weighs approximately 250 grams (8.8 ounces) using the standard spoon-and-level measurement method.
How many tablespoons is 1 cup of peanut butter?
There are 16 level tablespoons in 1 US cup of peanut butter, with each tablespoon weighing approximately 16 grams.
How many cups is 100 grams of peanut butter?
100 grams of peanut butter is equal to approximately 0.40 US cups.
What is the correct way to measure peanut butter?
Pack it firmly into a dry cup with a spatula, working out the air pockets, then level — peanut butter is the rare ingredient where pressing in is correct, because voids are the enemy. Natural, separated peanut butter should be stirred first; un-stirred, a cup can be half oil by volume and the recipe inherits the error.
What can I substitute for peanut butter?
Almond butter and cashew butter swap 1:1. Sunflower seed butter is the nut-free 1:1 (its green reaction with baking soda is harmless). For cookies, 1 cup of peanut butter ≈ 250 g — replace by weight, not volume, with tahini for a sesame version.