Cups to Grams Converter

This conversion is common when adapting a US recipe for a kitchen scale, or when doubling and tripling a recipe where cup-measuring errors would otherwise compound. A cookie recipe calling for 2¼ cups of flour becomes far easier to scale accurately once converted to 281g, since multiplying a gram figure by 1.5 or 3 avoids the awkward fractional cup math.

Recipe developers who publish both cup and gram measurements — a growing standard among food blogs and cookbook publishers — typically calculate the gram figure first from a tested weight, then back-convert to cups for readers without a scale, rather than the other way around, since weight is the more stable starting point.

Ice cream, custard, and other precise dessert bases often specify sugar and dairy by weight because small measuring errors are more noticeable in a smooth, low-volume base than in a forgiving dish like soup, where an extra tablespoon of an ingredient rarely changes the outcome.

USDA FoodData Central lists gram weights per cup for thousands of raw and prepared foods, derived from controlled measurements rather than estimates, and is the most widely cited source for US ingredient density data.

The 236.588ml US cup, standardized by NIST, is the volume baseline every gram-per-cup figure on this page assumes. Recipes written for a 250ml metric cup (common in Australia) will need a small adjustment, since that cup holds about 5.6% more.

Cookbook publishers that print both cup and gram measurements, including King Arthur Baking and America's Test Kitchen, typically test each ingredient's weight in-house using a digital scale and a standardized spoon-and-level or scoop-and-sweep method, which is why published figures can vary by a few grams between sources.

Professional bakeries almost universally measure by weight rather than volume, a practice documented in culinary training standards from institutions like the Culinary Institute of America, because weight removes the packing variability inherent to cup measuring.