How many grams is 1 cup of cornflour?
1 cup of cornflour (cornstarch) weighs
128g
That's 4.5oz. In a 250ml metric cup it's 135g.
This uses the US cup, the size American recipes mean. 1 cup is 237ml by volume.
UK cornflour is the fine white starch Americans call cornstarch. It isn't American corn flour, which is finely ground cornmeal.
Other amounts of cornflour
Where these numbers come from
USDA FoodData Central, SR Legacy, food 20027: “Cornstarch”. USDA lists these household measures for it:
- 1 cup = 128g
Fractions of a cup are the cup weight scaled down. The tablespoon figure is the cup weight divided by 16, since USDA doesn't list a tablespoon for this ingredient. The teaspoon is a third of the tablespoon. Metric-cup figures assume a 250ml cup, and Australian tablespoons hold 20ml. Weights under 10g are rounded to 0.1g, everything else to the nearest gram. Full source list.