Formula
The gram weight is the USDA FoodData Central household cup for the ingredient you pick. All-purpose flour is 125 g (FDC 168894), granulated sugar 200 g (FDC 169655), butter 227 g (FDC 173410), honey 339 g (FDC 169640), rolled oats 156 g (FDC 169705), and raw long-grain white rice 185 g (FDC 168877).
grams = cups × USDA grams per cup
The cups-to-milliliters page converts volume and ignores the ingredient. Packed, sifted, and scooped flour do not share one cup weight.
Assumptions
- The cup is the USDA household cup used in those records.
- The ingredient is the plain food named in the list.
- The result is a kitchen weight, not a laboratory density at a stated temperature.
Worked example
1 cup of all-purpose flour weighs 125 g.
Input definitions
- Cups
- How much of the chosen ingredient you measured.
- Ingredient
- The food whose USDA cup weight is used.
Limitations
A cup of flour can weigh less when it is spooned and more when it is scooped. The USDA cup for all-purpose flour is 125 g. A recipe that uses 120 g is using a different chart.
Questions
Why does flour differ from sugar?
The same cup holds a different mass of each food. Sugar's USDA cup is 200 g.
Is this 240 milliliters times a density?
No. The gram figure is the household weight USDA published for one cup.