How Many Grams Is a Cup of Peanut Butter?
1 cup of smooth commercial peanut butter ≈ 258 g (about 9.1 oz).
Natural peanut butter is slightly lighter (~250 g), and powdered varieties weigh far less (~30 g per cup before mixing).
Peanut butter is one of the trickier ingredients to convert because the cup-to-gram ratio depends on which jar you reach for. Commercial brands like Jif and Skippy are stabilized — the oil stays mixed in — so they pack into a measuring cup uniformly. Natural brands separate, so the part you scoop changes density throughout the jar.
Peanut Butter Cup-to-Gram Conversion Table
| Amount | Smooth (commercial) | Natural / no-stir | Crunchy |
|---|---|---|---|
| 1 cup | 258 g | 250 g | 252 g |
| 3/4 cup | 194 g | 188 g | 189 g |
| 2/3 cup | 172 g | 167 g | 168 g |
| 1/2 cup | 129 g | 125 g | 126 g |
| 1/3 cup | 86 g | 83 g | 84 g |
| 1/4 cup | 65 g | 63 g | 63 g |
| 2 tbsp | 32 g | 31 g | 32 g |
| 1 tbsp | 16 g | 16 g | 16 g |
| 1 tsp | 5 g | 5 g | 5 g |
By Brand (Where Labels Specify Grams Per Cup)
These figures are derived from the nutrition labels (serving size × servings per container, cross-checked against displacement). Variations are within ±5 g, well inside normal cooking tolerance.
| Brand / Style | 1 cup ≈ | Notes |
|---|---|---|
| Jif Creamy | 258 g | Standard reference, stabilized |
| Skippy Creamy | 258 g | Same as Jif within rounding |
| Skippy Natural (no-stir) | 252 g | Slightly lighter, palm oil base |
| Smucker's Natural (separated) | 240–255 g | Depends on whether you stir oil back in |
| Trader Joe's Crunchy Salted | 250 g | Natural style, peanut chunks |
| 365 Whole Foods Organic | 248 g | Natural, often separated |
| PB2 Powdered (dry) | 32 g | Powder only, before water added |
| PB2 reconstituted (per label) | ~110 g | 2 tbsp powder + 1 tbsp water × scaled |
Why Recipes Use Weight for Peanut Butter Baking
Peanut butter cookies, blondies, and no-bake bars rely on peanut butter as a structural ingredient — it's providing fat, protein, and moisture all at once. A 15 g discrepancy in "1 cup" can shift cookie texture from chewy to crumbly, or turn a no-bake bar from sliceable to greasy. That's why serious baking books give peanut butter in grams, not cups.
Useful baseline ratios:
- For cookies: ~258 g peanut butter to 200 g flour, 200 g sugar
- For sauces / dressings: 1 tbsp peanut butter ≈ 16 g, easy to halve or double
- For PB&J: 2 tbsp = 32 g = ~190 calories
Measuring Peanut Butter Without a Scale
If you only have measuring cups, two techniques help:
- Water-displacement method: Fill a 2-cup measure to 1 cup with water, then spoon peanut butter in until water rises to the 2-cup line. Drain the water and you have exactly 1 cup of peanut butter — no scraping the cup.
- Oil-coated cup: Wipe the inside of a measuring cup with a thin layer of neutral oil. Peanut butter releases cleanly, so you're not losing 10–15 g to the sides of the cup.
Scale a Peanut Butter Recipe
Doubling that peanut butter cookie recipe or halving a sauce? The recipe scaler handles ingredient-specific densities — paste it in and every ingredient (including the peanut butter) scales accurately.
Related Conversions
- Cups to grams (all ingredients) →
- 1 cup cocoa in grams →
- How much is 1/3 cup? →
- Printable kitchen conversion sheet →
FAQ
Is 1 cup of peanut butter exactly 258 grams?
258 g is the standard reference value for smooth, commercial peanut butter (e.g., Jif, Skippy regular) packed into a US cup. Natural / no-stir varieties are slightly lighter (~250 g) because they trap a bit more air when scooped, and powdered peanut butter is dramatically lighter (~30 g per cup before mixing).
Does crunchy peanut butter weigh the same as smooth?
Within ~5 g, yes — peanut chunks displace roughly the same mass as the smooth paste they replace. The texture changes how it scoops (more air pockets), so casual scooping of crunchy can come in 5–10 g lighter than smooth.
How many grams is 2 tablespoons of peanut butter?
About 32 g. Most nutrition labels round this to 32 g serving size, which is why 2 tbsp is the standard peanut-butter serving on US food labels.
Why do my measurements differ from the recipe's?
Three reasons: (1) US cups (237 ml) vs metric cups (250 ml) — a metric cup of peanut butter is closer to 272 g; (2) packing technique — pressing peanut butter into the cup vs scooping casually can vary the weight by 15–20 g; (3) oil separation in natural peanut butter — if you don't stir the jar first, the top scoops are oilier and lighter.
Is peanut butter density the same as almond butter?
Very close, yes. Almond butter is about 258 g per cup, identical to peanut butter for kitchen purposes. Cashew butter is slightly lighter (~250 g), and tahini is denser (~255 g but flows more like oil).
How do I convert peanut butter recipes from cups to grams accurately?
Use a kitchen scale set to grams. Tare the empty bowl, then scoop peanut butter directly into it until you hit the target weight. This is 10× more accurate than packing a measuring cup, especially for baking where peanut butter contributes to structure (cookies, blondies, sauces).