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Cooking conversion
Ounces of Peanut Butter to Milliliters
How many milliliters of peanut butter are in a given weight? Type a number of ounces below to see the volume. Math uses peanut butter's density of 1.083 g/mL.
Calculator
100 oz of peanut butter = 2617.68 mL
Ounces of Peanut Butter to Milliliters Conversion Table
Common values for peanut butter:
| Ounces of peanut butter | Milliliters |
|---|---|
| 10 oz | 261.77 mL |
| 25 oz | 654.42 mL |
| 50 oz | 1308.84 mL |
| 100 oz | 2617.68 mL |
| 150 oz | 3926.53 mL |
| 200 oz | 5235.37 mL |
| 250 oz | 6544.21 mL |
| 500 oz | 13088.42 mL |
| 1000 oz | 26176.84 mL |
How this works
Peanut butter has a density of about 1.083 g/mL (usda: 1 cup = 256g). That means 1 mL of peanut butter weighs 1.083 grams.
Milliliters = ounces × 26.1768
Note: Smooth, full-fat.
Why a cup of peanut butter doesn't always weigh the same
Volume measurements are forgiving in some ways and brutal in others. A cup of peanut butter can vary by 10-20% in weight depending on how it's measured: spooned vs scooped, packed vs loose, sifted vs unsifted. The density figure used here (1.083 g/mL) matches the most common published recipe conventions, but if you're after baking precision, weighing on a kitchen scale is more accurate than measuring by volume.
Sourced from USDA: 1 cup = 256g. Smooth, full-fat.
Volume vs weight in cooking
The American convention of measuring ingredients by volume (cups, tablespoons, teaspoons) is convenient but introduces variability that doesn't exist in weight-based recipes. Most professional bakers and bakeries weigh ingredients to within a gram because the structure of baked goods depends on precise ingredient ratios. For everyday cooking — soups, sauces, sautés — the volume-to-weight imprecision rarely matters. For baking that depends on rising or texture (cakes, breads, laminated doughs), it matters a lot.
The conversion
Multiplying the volume of peanut butter by its density (1.083 g/mL) gives the weight in grams. The calculator at the top of this page does the math automatically; the formula box above shows the resulting linear factor for the specific volume and weight units selected here.