How Much Is 1 Ounce of Peanut Butter in Cups?
1 ounce of peanut butter equals 0.11 cups. That's 28.35g, and Peanut butter has a density of 258g per cup. Because ounces measure weight and cups measure volume, the result depends on the ingredient's density.
Formula and Step-by-Step
- Start with 1 ounce of peanut butter
- Convert ounces to grams: 1 × 28.35 = 28.35g
- 1 cup of peanut butter = 258g
- 28.35g ÷ 258g/cup = 0.11 cups
The same formula works for any amount. Multiply (or divide) by the density, then convert units as needed.
Measuring Tip
Peanut butter should be stirred before measuring if the oil has separated. An unmixed jar will give inconsistent measurements.
Peanut Butter at Different Amounts
How peanut butter scales across common ounces measurements. Your amount (1 ounce) is highlighted.
Other Amounts of Peanut Butter
| Ounces | US Cups | Metric Cup | Imperial Cup |
|---|---|---|---|
| 1 ounce | 0.11 cups | 0.10 cups | 0.09 cups |
| 2 ounces | 0.22 cups | 0.21 cups | 0.18 cups |
| 3 ounces | 0.33 cups | 0.31 cups | 0.27 cups |
| 4 ounces | 0.44 cups | 0.42 cups | 0.37 cups |
| 5 ounces | 0.55 cups | 0.52 cups | 0.46 cups |
| 6 ounces | 0.66 cups | 0.62 cups | 0.55 cups |
| 8 ounces | 0.88 cups | 0.83 cups | 0.73 cups |
| 10 ounces | 1.10 cups | 1.04 cups | 0.91 cups |
| 12 ounces | 1.32 cups | 1.25 cups | 1.10 cups |
| 16 ounces | 1.76 cups | 1.66 cups | 1.46 cups |
Understanding the Units
What is an Ounce?
An ounce (oz) is a US customary unit of weight equal to 28.3495 grams or 1/16 of a pound. In cooking, "ounces" refers to weight (avoirdupois ounces), not fluid ounces which measure volume.
What is a Cup?
A cup is a US customary unit of volume equal to 236.588 milliliters or 8 fluid ounces. It is the most common volume measurement in American recipes. One cup can be divided into 16 tablespoons or 48 teaspoons.