About this site

This is a kitchen measurement converter. It exists because the usual advice — "100 grams is about half a cup" — is wrong for most ingredients, and confidently wrong advice is worse than none at all.

Where the numbers come from

Every density figure on this site records where it came from and when it was last checked. Values corroborated against a cited authority are marked as verified. Values that are widely used in cooking but not yet checked against a primary source are marked provisional, and we say so on the ingredient's page rather than presenting them as settled.

We would rather tell you a number is unverified than dress up a guess with a citation. If you spot a figure that looks wrong, please tell us.

What we mean by a cup

All cup measurements here are US cups: 236.6 millilitres. A metric cup is 250 ml and an imperial cup is roughly 284 ml, so if you are working from a British or Australian recipe the figures here will run slightly small.

A word on accuracy

Weight-to-volume conversion is approximate by nature. How firmly an ingredient is packed, how humid your kitchen is, how finely something is ground, even the brand — all of it shifts the answer. If precision matters to your baking, use a scale.