Cornflour: Cups to Grams
How many grams is a cup of cornflour?
One US cup of cornflour weighs roughly 120 grams, a tablespoon is about 8 grams and a teaspoon about 2.5 grams. These figures are specific to cornflour: a cup measures volume, but different ingredients have very different densities, so a cup of flour and a cup of honey are nowhere near the same weight. That is exactly why swapping a UK recipe's grams for an American recipe's cups goes wrong unless you convert per ingredient.
For baking especially, weighing in grams on a digital scale is far more accurate and repeatable than scooping cups, since how firmly you pack the cup changes the result. Use the boxes above to convert any amount either way. For other ingredients, see the full cups to grams converter or go the other way with grams to cups.
Frequently asked questions
Is the cornflour (cups → g) converter free?
Yes. It is completely free, with no sign-up and nothing to install. It runs entirely in your browser.
Are these figures exact?
They are reliable guides based on standard UK values, but ingredients, ovens and appliances vary. For anything involving meat, always check it is cooked through with a thermometer rather than relying on time alone.