Convert US cups to milliliters instantly, using the standard definition where one US customary cup is 236.5882365 milliliters. This conversion is a recipe staple, needed whenever an American recipe measures in cups but your jug or scale is marked in milliliters. Type any number of cups, including fractions like 0.5, and the milliliter value appears live as you type. Note that a US cup differs from a metric cup of 250 milliliters and from an imperial cup, and this tool uses the US customary cup, which is the most common online. Because dividing recipes and scaling batches by hand invites mistakes, the tool keeps your amounts accurate. It runs locally in your browser, so it is instant, private, and works offline once loaded.