One cup of icing sugar weighs around 125 grams or 4.4 ounces.
That is about 4 cups.
One cup is 250 gm. -So 500 gm is about 2 cups.
If u wanted to make icing then icing sugar is better to be used. But if only sugar is available then you must melt it down in a saucepan.. Search it on google for how to do it as I'm not completely sure. I Just use icing sugar
There are many types of icing and frosting, the amounts of sugar for each vary. Please see the links below for a wide variety of icing recipes, many of them simple to do.
that is about 1/8 cup
Depends on the size of the cup
'120g of sugar is equal to how many cup
Icing sugar and caster sugar are not interchangeable. This is because icing sugar absorbs water whereas caster sugar does not. Switching icing sugar for caster in a baked good recipe will result in a good with a brick-like texture, whereas substituting caster sugar for icing will result in something liquidy and granular.
One official cup is 250gm. So your amount is approximately 1/5 of a cup.
In some cases yes, but not if you're making icing. Icing sugar is far finer grained, and as such caster sugar will not be an adequate replacement in this case. (Your icing will be granular and not set properly). You may be able to if it's a meringue recipe, but you'd be better off finding a recipe that does not use icing sugar to begin with.
Caster sugar is about 190g per cup... I'd say use one whole cup.