How many grams are in a cup of peanut butter?

A cup of peanut butter weighs about 258 grams, which is roughly 9.1 ounces. This figure applies to smooth and creamy peanut butter at room temperature.

How many grams are in a tablespoon of peanut butter?

Since there are 16 tablespoons in a cup, one tablespoon of peanut butter weighs about 16.1 grams using the same 258 g/cup density.

Is 258 grams per cup an exact figure?

No, it is an approximation. Brand, oil content, and how tightly the peanut butter is packed into the cup all affect the actual weight. For baking where precision matters, weigh the peanut butter on a kitchen scale instead of relying on a cup measure.

Does crunchy peanut butter weigh the same as smooth?

Crunchy peanut butter contains peanut pieces that can trap small air gaps when scooped into a cup, so it may weigh slightly less per cup than smooth peanut butter. This tool uses the smooth-peanut-butter figure.

Does natural peanut butter weigh the same as processed?

Natural peanut butter can separate, with oil rising to the top. If it is stirred and packed the same way as processed peanut butter, the weight per cup is close, but unstirred natural peanut butter can vary more than the 258 g/cup figure suggests.

Is this a US cup or a metric cup?

This tool uses the US cup (236.6 ml). A metric cup (250 ml) would give a slightly higher gram result.

Peanut Butter Cups to Grams

Name: Peanut Butter Cups to Grams
Availability: InStock
Author: Nham Vu

Enter a number of cups of peanut butter to get the weight in grams and ounces.

Peanut Butter Converter

Amount in Cups

Result

258 g

≈ 9.10 oz

Quick Reference Table

Cups	Grams	Ounces

Values are measured by US cup (236.6 ml) using a density of 258 grams per cup of smooth peanut butter. This is an approximation: brand, oil content, and packing all shift the real weight, and crunchy or unstirred natural peanut butter can vary from this figure.

Copied!

Summary

Enter a number of cups of peanut butter to get the weight in grams and ounces.

How it works

Enter the number of cups of peanut butter you want to convert.
The gram weight updates instantly based on a fixed density of 258 g per cup.
The ounce equivalent is shown alongside the gram result.
Use the reference table for common cup amounts without typing a value.

Use cases

Scale a peanut butter cookie, energy ball, or baking recipe written in cups to a kitchen scale in grams.
Convert a US recipe to metric for baking or cooking outside the US.
Check how much a serving of peanut butter weighs for a meal or macro plan.
Portion out peanut butter by weight for batch meal prep or protein tracking.
Match a scoop measurement to the gram listing on a nutrition label.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu