Cups to Grams Converter

How cups to grams conversion works

This free cups to grams converter turns US cups into grams for 12 common baking ingredients, and it turns grams back into cups too. It is made for home bakers and cooks who follow recipes written in cups but want the accuracy of weighing. It is free, needs no sign-up, and runs entirely in your browser.

How many grams are in a cup?

There is no single answer, because grams measure weight and cups measure volume, so the answer depends on the ingredient. One US cup of all-purpose flour weighs 120 grams, one cup of granulated sugar weighs 200 grams, and one cup of butter weighs 227 grams. Always check the weight for your ingredient before you start baking.

King Arthur Baking lists one cup of all-purpose flour at 120 grams in its ingredient weight chart, updated in 2024. Its chart gives a different weight for almost every ingredient, which is why a converter that knows each ingredient beats a single fixed number.

Why does the same cup weigh different amounts for different ingredients?

A cup measures the space an ingredient fills, not how heavy it is, so dense ingredients weigh more than light, airy ones in the same cup. Honey packs about 340 grams into one cup, while rolled oats fill the same cup with only 90 grams, because oats trap more air between the flakes. Weighing gives more consistent results than scooping.

Packing changes the weight too. A cup of flour scooped straight from the bag can weigh 20 grams more than a cup spooned lightly into the cup and levelled off, so spoon and level when a recipe was written that way.

How do I convert cups to grams without a scale?

Pick your ingredient in the converter above, type the number of cups, and read the grams result, which uses the typical weight per cup for that ingredient. For flour, multiply cups by 120, for sugar multiply by 200, and for butter multiply by 227. The result is approximate, so for breads and cakes a scale is the most reliable tool.

How many grams are in a tablespoon of flour?

One tablespoon of all-purpose flour weighs about 7.5 grams, because one US cup holds 16 tablespoons and one cup of flour weighs 120 grams. Divide 120 by 16 to get 7.5 grams per tablespoon. The same method works for every ingredient in the table above: take its grams per cup, divide by 16, and you have its weight per tablespoon.

Is a cup of butter the same weight as a cup of water?

One US cup of butter weighs 227 grams, while one cup of water weighs 236 grams, because butter is less dense than water. The difference is small, only 9 grams per cup, but it matters in baking, where fat and liquid play different roles. Use the converter above with the ingredient selected, rather than swapping one weight for the other.

The reference table above is built from the same weights the converter uses, so every row matches a result you can get from the tool. Change the ingredient in the converter and the table highlights the row for that ingredient.