1 cup of baking powder in grams — 192 g.

Why 192 g per cup

Baking powder is lighter than baking soda (192 g/cup) because of the starch filler that keeps the acid and base components separate until activation. 1 tsp ≈ 4 g.

Leaveners — baking soda, baking powder, yeast — are used in such small quantities (rarely more than 2 tsp per recipe) that precise weighing is overkill for most home bakers. The cup figure listed here is useful only for sanity-checking; you should never need to measure these by the cup.

The most accurate way to measure baking powder

For recipes where the outcome matters — bakes, doughs, anything leavened — measure baking powder on a kitchen scale set to grams. Set the bowl on the scale, press tare to zero, then add until the readout matches the gram value the recipe calls for. This removes the largest source of cup-to-cup variation: how you scoop.

The cup-based numbers on this page assume the “spoon and level” method — fluffing the ingredient in its container, spooning it into the cup, and levelling the top with a straight edge. Scooping directly with the cup packs more in, and can push the gram value up by 20-30 % for fluffy ingredients like flour and cocoa.