What does this tool do?
Volume measures and weight measures are not interchangeable without knowing the ingredient’s density. A cup of flour weighs much less than a cup of water. This converter uses typical densities for common kitchen ingredients and reports the equivalent in several units.
The Formula
Weight = volume × density; 1 US cup = 236.588 ml; 1 ounce = 28.3495 gFrequently Asked Questions
Why does a cup of flour weigh less than a cup of water?
Flour is much less dense because the particles trap air. A US cup of all-purpose flour is about 125 g, while a cup of water is about 237 g.
Are US and metric cups the same?
No. A US cup is 236.6 ml and a metric cup is 250 ml, a difference of about 6%. Use the cup your recipe was written for, especially in baking.