Cooking converter · USDA gram weights

Peanut Butter Cups to Grams

Quick answer

1 cup of peanut butter weighs 258 g (9.1 oz). 1 tablespoon is 16.1 g and 1 teaspoon is 5.4 g.

1 cup: 258g; 9.1 oz
1 tablespoon: 16.1g
1 teaspoon: 5.4g
100 g: 0.39cups; of a US cup

Peanut butter is thick and sticky, and it is easy to leave gaps in the cup. Pressing it in with a spatula, then levelling, is how a cup of it is usually measured, and weighing it on the scale saves the washing up.

Convert any amount of peanut butter

Starts at 1 cup of peanut butter in grams (258 g); change the units to go from grams back to cups.

Amount of peanut butterFromTo

1 cup of peanut butter is 258 grams

Cups: 1
Tablespoons: 16
Teaspoons: 48
Grams: 258
Ounces: 9.1

Peanut Butter: cups to grams and ounces

Cups of peanut butter in grams and ounces
Cups	Grams	Ounces
1/4 cup	64.5	2.28
1/3 cup	86	3.03
1/2 cup	129	4.55
2/3 cup	172	6.07
3/4 cup	193.5	6.83
1 cup	258	9.1
1 1/2 cups	387	13.65
2 cups	516	18.2
3 cups	774	27.3
4 cups	1,032	36.4

Tablespoons and teaspoons of peanut butter in grams and ounces
Spoons	Grams	Ounces
1/2 tablespoon	8.1	0.28
1 tablespoon	16.1	0.57
2 tablespoons	32.3	1.14
3 tablespoons	48.4	1.71
4 tablespoons	64.5	2.28
6 tablespoons	96.8	3.41
8 tablespoons	129	4.55
1/4 teaspoon	1.3	0.05
1/2 teaspoon	2.7	0.09
3/4 teaspoon	4	0.14
1 teaspoon	5.4	0.19
2 teaspoons	10.8	0.38
3 teaspoons	16.1	0.57

Peanut Butter: grams and ounces to cups

For a recipe written in grams or ounces, here is how much of a US cup each weight of peanut butter fills.

Grams of peanut butter in cups, tablespoons and ounces
Grams	Cups	Tablespoons	Ounces
25 g	0.1	1.55	0.88
50 g	0.19	3.1	1.76
100 g	0.39	6.2	3.53
125 g	0.48	7.75	4.41
150 g	0.58	9.3	5.29
200 g	0.78	12.4	7.05
250 g	0.97	15.5	8.82
300 g	1.16	18.6	10.58
400 g	1.55	24.81	14.11
500 g	1.94	31.01	17.64

Ounces of peanut butter in grams, cups and tablespoons
Ounces (weight)	Grams	Cups	Tablespoons
1 oz	28.3	0.11	1.76
2 oz	56.7	0.22	3.52
3 oz	85	0.33	5.27
4 oz	113.4	0.44	7.03
6 oz	170.1	0.66	10.55
8 oz	226.8	0.88	14.06
12 oz	340.2	1.32	21.1
16 oz	453.6	1.76	28.13

What a cup of peanut butter weighs, and why it can differ

USDA’s weight for “1 cup” is 258 g. Next to a cup of water, which holds about 236.6 g, that is 109% of the weight of a cup of water, so it weighs about the same as the same volume of water. The same cup works out at 1.1 g per millilitre.

USDA lists one cup measure for peanut butter (“1 cup”), so this page has no second figure to compare it with; if a recipe depends on the exact amount, weigh it.

USDA lists no tablespoon or teaspoon measure for this entry, so that weight is the cup weight divided by the US ratio (16 tablespoons or 48 teaspoons to the cup).

Counting calories instead of cups? See calories and macros in peanut Butter, per 100 g and per portion.

Frequently asked questions

How many grams are in 1 cup of peanut butter?

USDA measures 1 cup of peanut butter (its portion is listed as “1 cup”) at 258 g, which is 9.1 oz.

How many cups is 500 g of peanut butter?

500 g of peanut butter is 1.94 cups, using 258 g per cup of peanut butter. A 1 kg bag of peanut butter would fill 3.88 cups, and a 1 lb pack of peanut butter would fill 1.76.

How much does a part of a cup of peanut butter weigh?

Half a cup of peanut butter is 129 g, a third of a cup of peanut butter is 86 g and a quarter cup of peanut butter is 64.5 g. For small amounts, 1 tablespoon of peanut butter is 16.1 g (0.57 oz) and 2 tablespoons of peanut butter are 32.3 g.

If my recipe uses 250 ml metric cups, how much peanut butter is that?

A 250 ml cup is about 5.7% larger than a US cup, so a metric cup of peanut butter comes to about 272.6 g, going by USDA’s 258 g for a US cup of peanut butter. The weights on this page are for the US cup of about 237 ml.

Is it better to weigh peanut butter than to measure it by the cup?

For baking, yes. USDA lists one cup measure for peanut butter (“1 cup”), so this page has no second figure to compare it with; if a recipe depends on the exact amount, weigh it. Next to water, a cup of peanut butter is 109% of the weight of a cup of water, so it weighs about the same as the same volume of water, and 258 g on a scale is 258 g however the peanut butter was scooped.

What weighs about the same as a cup of peanut butter?

Among these converters, ricotta cheese (246 g per cup) and plain yogurt (245 g per cup) come closest to 258 g. Same volume, different ingredient: the weights are close, but the foods are not interchangeable.

Weighed your peanut butter? Log it in seconds

Once the recipe is in grams, CalorTracker turns it into calories and macros: snap a photo, say what you ate or type it, and the AI estimates the nutrition for you to check. Free to start.

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Weights are USDA averages for the entry named below. Packing, sifting, brand and moisture change the weight of a real cup, so treat them as a good starting point, not a lab measurement.

USDA describes this entry as “Peanut butter, smooth style, with salt (Includes foods for USDA's Food Distribution Program)” (FoodData Central SR Legacy 2018-04).

Source: USDA FoodData Central, FDC 174266, retrieved October 22, 2026. How we calculate.