Cups to Grams — Butter

One US cup of butter weighs 227 grams (8 ounces or 2 standard sticks). Half a cup is approximately 113.5 grams and a quarter cup is about 57 grams. Butter is one of the easier ingredients to convert because its density is consistent, unlike flour or sugar which can vary based on how tightly they are packed.

In UK recipes, butter is almost always measured by weight in grams. American recipes use cups or sticks. If you are following an American baking recipe in a UK kitchen, this converter saves you from guessing and helps you get the proportions right.

Baking is a science, and small measurement errors can affect the outcome. Cup measurements can vary by 10-20% depending on how you scoop and level the ingredient. A cup of flour scooped and packed might weigh 140 grams, while a cup spooned and levelled might weigh only 120 grams.

Butter is more forgiving than flour because its density does not change much. However, if your recipe calls for softened butter in a cup, the measurement assumes it is firmly packed with no air gaps. For the most accurate results, weigh your butter on a kitchen scale.

The weight conversion is the same for salted and unsalted butter. One cup of either type weighs 227 grams. However, if your recipe calls for unsalted butter and you only have salted, reduce any added salt in the recipe by about 1/4 teaspoon per half cup (113g) of butter.

Most baking recipes call for unsalted butter so you can control the salt level precisely. If a recipe does not specify, assume unsalted.