Peanut Butter
US Cup to Gram
Understanding Peanut Butter Conversions
The Math Behind This Conversion
To convert 1 us cup of peanut butter to gram, we use the density of peanut butter (1.08 g/ml). A us cup contains 236.59ml, so 1 us cup equals 236.59ml. Multiplying by the density: 236.59ml × 1.08 g/ml = 255.5g.
US vs Metric Cups: Why It Matters
When converting peanut butter, the cup size matters significantly. A US cup (236.6ml) of peanut butter weighs 256g, while a metric cup (250ml) weighs 270g—a difference of 14g (6%). If you're following a recipe from a different country, using the wrong cup size could affect your results. American recipes use US cups, while recipes from Australia, UK, and most other countries use metric cups.
Measurement Tip
Measuring peanut butter by volume is notoriously inconsistent because the pieces don't pack uniformly. Weighing with a kitchen scale gives much more reliable results. The density value we use (1.08 g/ml) represents an average, but your actual measurement may vary by 15-20%.
About Our Data
The density value of 1.08 g/ml for peanut butter is from the USDA FoodData Central database (ID: 172470). This measurement was taken with peanut butter firmly packed into the measuring cup.