Cups to grams: peanut butter

A US cup of peanut butter weighs roughly 258 grams, or 9.10 ounces. Weighing is always more repeatable than scooping, which is why professional recipes give grams.

Amount in US cups

Or a weight to convert back

Weight

258.0g

= Exact peanut butter cups to grams Show in

Weight in ounces: 9.101
Cups in the weight you entered: 0.388
Tablespoons in that weight: 6.20
Tablespoons: 16.00
Teaspoons: 48.0
Volume: 236.6
Grams per cup used: 258.0
Implied bulk density: 1.0905 g/mL

Show the working

Amount in US cups = 1
Or a weight to convert back = 100
Grams per cup used = 258 = 258
Weight = 1 * 258 = 258
Weight in ounces = 258 / 28.349523125 = 9.100 68
Tablespoons = 1 * 16 = 16
Teaspoons = 1 * 48 = 48
Volume = 1 * 236.5882365 = 236.588
Cups in the weight you entered = 258 > 0 ? 100 / 258 : 0 = 0.387 597
Tablespoons in that weight = 0.387 597 * 16 = 6.201 55
Implied bulk density = 258 / 236.5882365 = 1.0905

Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.

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The formula

grams = cups x grams per cup
1 US cup = 16 tablespoons = 48 teaspoons = 236.588 236 5 mL exactly
1 ounce = 28.349 523 125 g exactly

Cup figures assume the spoon-and-level convention: fluff the ingredient, spoon it into the cup and sweep the top flat. Dipping the cup straight into the bag packs in up to 20% more.

The volume conversions on this page are exact by definition. Only the grams-per-cup figure is a measured convention, and it is stated above so you can substitute your own.

Common measures of peanut butter

Measure	Grams	Ounces
1 teaspoon	5.38	0.190
1 tablespoon	16.13	0.569
1/4 cup	64.5	2.28
1/3 cup	86.0	3.03
1/2 cup	129.0	4.55
1 cup	258.0	9.10
2 cups	516.0	18.20

Rounded for the kitchen. The calculator above keeps full precision.

Frequently asked

How many grams are in a cup of peanut butter?

About 258 g, using the spoon-and-level convention for a US cup.

How many grams are in a tablespoon of peanut butter?

About 16.13 g, since a tablespoon is exactly one sixteenth of a US cup.

Is a US cup the same as a metric cup?

No. A US cup is 236.588 mL, a metric cup is 250 mL and an imperial cup is 284.13 mL. A recipe that says "cup" without qualification almost always means the US one.

Where the numbers come from

Volume relationships follow the US customary definitions; the grams-per-cup figure is the widely published spoon-and-level convention for this ingredient.