Convert Peanut butter: cups to oz
1 cup of Peanut butter = 9.52 oz
Amount of Peanut butter
Density: 1.141 g/ml · Peanut butter
Peanut butter: cups to oz at a glance
The amounts people ask for most, worked out for Peanut butter.
How much Peanut butter weighs
Every figure below is one measured number — 270 g per US cup — scaled. That is why this table and the converter above it cannot disagree.
One cup, side by side
How much does a cup of peanut butter weigh?
270 g, from King Arthur's 135 g per half cup. That makes peanut butter the heaviest fat on this site — a cup of it outweighs a cup of butter (227 g) by nearly a fifth, and outweighs a cup of all-purpose flour more than twice over.
Source for Peanut butter: King Arthur Baking (135 g per 1/2 cup) · King Arthur Baking ingredient weight chart
Frequently asked questions
How many oz is 1 cup of Peanut butter?
1 cup of Peanut butter is 9.52 oz, because one US cup of Peanut butter weighs 270 g. That single measured figure is the whole conversion — every other unit on this page is derived from it.
How many cups is 4 oz of Peanut butter?
4 oz of Peanut butter is 0.42 cups. It is the same conversion read backwards, so this page and its reverse always agree.
Is that ounces by weight, or fluid ounces?
By weight. dishscale's ounce is the international avoirdupois ounce, 28.3495 g, so one cup of Peanut butter is 9.52 oz. A US fluid ounce is a volume and there are eight of them to the cup, so that same cup is 8 fl oz at the same time. The two readings coincide only for an ingredient that happens to weigh eight ounces to the cup.
Where does dishscale's figure for Peanut butter come from?
One US cup of Peanut butter is 270 g. The dataset records that as: “King Arthur Baking (135 g per 1/2 cup)”. That is the King Arthur Baking ingredient weight chart. Every ingredient on the site carries the reference its weight came from, so any number here can be checked — and corrected if the source disagrees.