How Much Is 3 Cups of Peanut Butter in Ounces?
3 cups of peanut butter equals 27.30 oz. Peanut butter has a density of 258g per cup (258g per cup), which means it's relatively heavy compared to other common cooking ingredients. For comparison, 3 cups of all-purpose flour would be 13.24 oz.
Formula and Step-by-Step
- Start with 3 cups of peanut butter
- 1 cup of peanut butter = 258g
- 3 × 258 = 774g
- Convert grams to ounces: 774 ÷ 28.3495 = 27.30 oz
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 cups measurements. Your amount (3 cups) is highlighted.
For reference, 3 cups of peanut butter (774g) is close in weight to a 2 lb bag of sugar (907g).
Other Amounts of Peanut Butter
| Cups | US Ounces | Metric Cup | Imperial Cup |
|---|---|---|---|
| 0.25 cups | 2.28 oz | 2.40 oz | 2.73 oz |
| 0.33 cups | 3.00 oz | 3.17 oz | 3.61 oz |
| 0.5 cups | 4.55 oz | 4.81 oz | 5.46 oz |
| 0.75 cups | 6.83 oz | 7.21 oz | 8.20 oz |
| 1 cup | 9.10 oz | 9.62 oz | 10.93 oz |
| 1.5 cups | 13.65 oz | 14.42 oz | 16.39 oz |
| 2 cups | 18.20 oz | 19.23 oz | 21.86 oz |
| 3 cups | 27.30 oz | 28.85 oz | 32.79 oz |
| 4 cups | 36.40 oz | 38.47 oz | 43.72 oz |
| 5 cups | 45.50 oz | 48.08 oz | 54.65 oz |
Understanding the Units
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.
What is an Ounce?
Weight ounces and fluid ounces are different measurements. A fluid ounce measures volume (29.574 ml), while an ounce measures weight (28.35g). They only align for water, where 1 fl oz weighs approximately 1 oz.