Peanut Butter Cups to Grams
The 270 g/cup rate doubles King Arthur's 135 g half-cup of peanut butter; jar nutrition servings are not direct independent measurements of a whole cup.
Reference measurement
270 grams per US cup
Stir separated oils in, pack into a dry US cup without air gaps, and level.
King Arthur Baking lists 1/2 cup peanut butter as 135 g; normalized to 270 g per US cup. Source note
Natural and stabilized peanut butter can differ slightly.
Common Peanut Butter measurements
| US cups | Grams |
|---|---|
| 0.25 US cups | 67.5 grams |
| 0.333 US cups | 90 grams |
| 0.5 US cups | 135 grams |
| 0.667 US cups | 180 grams |
| 0.75 US cups | 202.5 grams |
| 1 US cup | 270 grams |
| 1.5 US cups | 405 grams |
| 2 US cups | 540 grams |
Practical examples
- 1/2 US cup = 135 grams.
- 1 US tablespoon = 16.88 grams.
- 3 US teaspoons = 16.88 grams.
Measuring note
Stir separated oils in, pack into a dry US cup without air gaps, and level.
Natural and stabilized peanut butter can differ slightly.
A half-cup baking chart differs from a jar's label
King Arthur's peanut-butter chart entry is 135 g per half cup, so this calculator uses 270 g per cup. The Jif Creamy manufacturer label states two tablespoons (33 g). Multiplying eight such servings suggests 264 g, but that extrapolates rounded nutrition servings rather than proving another directly measured cup weight.
The chart discrepancy should not be concealed by averaging. Under the chosen baking chart, three-quarters of a cup gives 202.5 g. If a recipe or current jar label supplies an exact amount in grams, use that amount instead of assuming a spooned and packed cup is standardized across products.
Oil separation alters what you scoop
Some natural peanut butters split into an oily top layer and thicker peanut solids. Stir the jar thoroughly before filling a dry measuring cup, press gently to remove large air spaces, and level the surface; an unmixed spoonful is not representative of the whole jar.
A no-stir prepared spread and a separated natural product may fill a cup differently. A scale captures what actually enters a scaled recipe, while this reference only calculates the stated King Arthur convention; it cannot infer your jar's density from its name.