About
CupEnGramme was born from a very concrete problem: an American recipe that calls for "2 cups of flour," followed by the doubt that comes next. A cup is a volume. On a scale, how much does that actually weigh? The answer changes depending on whether it's flour, sugar, or butter — and that's exactly what most online converters ignore.
The problem we're trying to solve
Converting "1 cup = 250 ml" to grams by blindly multiplying by water's density is the most common mistake in baking — and the reason so many "translated" recipes come out too dense or too dry. Flour weighs about half as much as the same volume of sugar. Honey weighs almost one and a half times more than water. A converter that ignores the ingredient gives, at best, a rough approximation; at worst, a ruined recipe.
How the tool works
The converter applies the correct density for each common ingredient — flour, sugar, brown sugar, butter, oil, honey, and about ten others — to go from volume to weight (and back) with a precision that actually makes sense in the kitchen. The portion scaler lets you paste in a whole recipe and multiply or divide it in one click, converting units along the way if needed. Everything is calculated directly in your browser: nothing you type is ever sent to a server.
Why this site exists
CupEnGramme is a free tool, no account required, built to answer a precise question quickly in the middle of a recipe. The accompanying blog gathers answers to the questions that come up most often when adapting an American recipe — so you don't have to redo the math every time.