⅓ cup powdered sugar in grams
⅓ cup of powdered sugar = 40 grams · 1.41 oz · 5.33 tbsp
That is a third of a cup, levelled off rather than heaped. A full US cup of powdered sugar weighs 120 g, so ⅓ cup comes to 40 g. Use the converter for any other amount.
Based on a measured density of 120 g per US cup (236.6 ml), spooned and levelled rather than scooped. Last reviewed .
How ⅓ cup of powdered sugar works out
One US cup of powdered sugar weighs 120 grams, so multiply by 0.333 to get a third of a cup: 120 × 0.333 = 40 g. In the other direction, 40 g of powdered sugar divided by 120 brings you back to ⅓ cup.
If you have no scales, ⅓ cup is 5.333 level tablespoons of powdered sugar (16 teaspoons), because a US cup holds 16 tablespoons. In a 250 ml metric cup — the Australian, New Zealand and modern UK standard — the same fraction is 42.3 g.
Tip: Sift powdered sugar before measuring or before adding to a glaze; even sealed bags develop lumps that won't smooth out later.
Other powdered sugar amounts
⅓ cup of powdered sugar: common questions
How many grams is ⅓ cup of powdered sugar?
⅓ cup of powdered sugar weighs about 40 grams (1.41 oz), based on a full US cup of powdered sugar weighing 120 grams.
How many tablespoons is ⅓ cup of powdered sugar?
5.333 level tablespoons, since a US cup holds 16 tablespoons. That is 16 teaspoons.
Is ⅓ cup the same in a metric cup?
No. A 250 ml metric cup is slightly larger than the 236.6 ml US cup, so ⅓ cup of powdered sugar is 42.3 grams by the metric cup against 40 grams by the US cup.
For every other amount, see the full powdered sugar cups to grams tables.