Why one conversion is not enough
A US cup is 236.6 mL of volume. How much that weighs depends entirely on what is in it: flour packs at about 125 g, granulated sugar at 200 g, honey at 340 g. Any converter that returns a single number for "a cup" is wrong for two of those three.
The densities used here
- All-purpose flour 125 g · bread flour 127 g · whole wheat 120 g
- Granulated sugar 200 g · brown sugar (packed) 220 g · powdered 120 g
- Butter 227 g (one US stick is 113 g) · oil 218 g
- Honey 340 g · maple syrup 320 g · molasses 337 g
- Cocoa powder 85 g · rolled oats 90 g · chocolate chips 170 g
Scooping changes everything
Dip-and-sweep can add 20–30% more flour than spoon-and-level. All the figures here assume spoon-and-level, which is what most professional recipes mean. If your cup of flour weighs 150 g, you are compacting it — fluff the flour first.
When to weigh instead of measure
Anything where structure matters: bread, pastry, macarons, cakes. A 20 g error in flour is 16% of a single cup and enough to change a crumb. For soups and stews, cups are perfectly fine.
Frequently Asked Questions
How many grams is a cup of flour?
125 g with spoon-and-level all-purpose flour; 120 g whole wheat, 127 g bread flour.
Why does my recipe say 120 g per cup?
Some sources use 120 g and others 130 g. Pick one and stay consistent — the difference is about a tablespoon per cup.
Is a US cup the same as a metric cup?
No. US = 236.6 mL, metric/Australian = 250 mL. That is a 5% difference, which matters in baking.
Privacy & Your Data
KitchenCalcHub runs entirely in your browser. Recipes, measurements and conversions are processed on your device and never uploaded — there is no server to store them.