Ingredient-specific accuracy. Unlike generic converters that use a single cups-to-grams ratio, ConvertCal uses ingredient-specific density data. A cup of all-purpose flour (125g) weighs significantly different from a cup of honey (340g) or cocoa powder (86g).
Trusted data sources. All density values are sourced from the USDA FoodData Central database and King Arthur Baking's ingredient weight chart — the same references professional bakers and food scientists use.
Measurement method matters. We specify exactly how each ingredient should be measured (spooned & leveled, scooped, packed, or liquid measure) because the method can change the weight by 20-30%.
Fraction support. Enter amounts the way you see them in recipes: 1/2, 1 1/3, ¼ — no need to convert to decimals first.
Standard: All measurements use US customary cups (236.59 mL). For UK Imperial or Australian cups, see our full converter with unit options.