Convert Cups of All-Purpose Flour to Ounces
1 cup of All-Purpose Flour =
4.2oz
Sifted; unsifted is 125g/cup
Frequently Asked Questions
How many grams are in 1 cup of All-Purpose Flour?
One US cup of All-Purpose Flour weighs approximately 120g. This is the standard reference weight used by King Arthur Baking and the USDA. Use a kitchen scale for the most accurate measurement; volume measurement can vary by 5-10% depending on how you scoop.
Why does sifting change the gram weight of All-Purpose Flour?
Sifting aerates All-Purpose Flour, separating clumps and increasing volume. The result: a sifted cup weighs less than an unsifted cup of the same ingredient. For accurate baking, weighing All-Purpose Flour on a scale (120g/cup unsifted) is more reliable than measuring by volume.
Should I use a scale or measuring cups for All-Purpose Flour?
A digital kitchen scale is more accurate than measuring cups for All-Purpose Flour. Volume measurement varies by how you scoop or pack the cup, while weight is consistent. For recipes where precision matters (especially baking), weighing All-Purpose Flour at 120g per cup gives the most reliable result.
Where do these All-Purpose Flour conversion values come from?
The conversion values for All-Purpose Flour on this page come from the following authoritative sources: King Arthur Ingredient Weight Chart;USDA FDC #169761. We cross-reference multiple sources when they're available to ensure accuracy.