Peanut Butter
Ounce to Gram
Understanding Peanut Butter Conversions
The Math Behind This Conversion
To convert 1 ounces of peanut butter to grams, multiply by 28.3495 (the number of grams per ounce). So 1oz × 28.3495 = 28.3g.
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.
Frequently Asked Questions
1 ounce of peanut butter weighs approximately 28 gram. This is based on a density of 1.08 g/ml for peanut butter.
For the most accurate measurement of peanut butter, use a kitchen scale. Volume measurements can vary based on how the ingredient is packed.
Weighing peanut butter gives more consistent results than volume measurements. A cup of peanut butter can vary by 10-20% depending on how it's measured (spooned vs scooped). Professional bakers always weigh ingredients for this reason.
Peanut Butter has a density of 1.08 g/ml, meaning each milliliter weighs 1.08 grams. Different ingredients have different densities—for example, flour is lighter than sugar—which is why each needs its own conversion factor.