Formula
grams = cups × grams-per-cup (ingredient density)1 US cup = 16 tbsp = 48 tsp = 8 fl oz ≈ 236.6 mL How it works
Volume and weight are not interchangeable: a cup of flour weighs about half as much as a cup of sugar, and a cup of honey weighs nearly three times as much as a cup of oats. To convert between them you need the density of the specific ingredient, which this tool looks up for you.
The figures assume US customary cups and spoons, with dry ingredients spooned into the cup and levelled off. Scooping flour straight from the bag packs it down and can add 20% or more, which is one of the most common reasons baked goods turn out dry. Brown sugar is the exception — recipes expect it firmly packed.
For the most consistent baking, use a kitchen scale. Many professional recipes are written in grams for exactly this reason, and converting your favourite recipes once makes them far more repeatable.
Frequently asked questions
How many grams are in a cup of flour?
About 120–130 g for all-purpose flour that is spooned and levelled. This converter uses 125 g. A packed or scooped cup can reach 150 g.
Is a UK or metric cup the same as a US cup?
Not quite. A metric cup (used in Australia, Canada and elsewhere) is 250 mL, slightly larger than the 236.6 mL US cup. For most recipes the difference is small, but it adds up in large batches.
How much does a stick of butter weigh?
One US stick is ½ cup, 8 tablespoons or about 113 g.