how much baking powder to go with plain flour to replace SR flour?

[StealthPolarBear]

have googled but everything talks about cups

i know it's dull but please help!

have we moved to america?
I can't find one site that doesn't talk in cups - my cups all vary in size!

looks like a cup is 100g?

Try googling onUK?

sorted!

Depends on who you want to believe. See
Delia or random page from google.

I used 1 cup to 250g flour yesterday for some reason but I think it's too much. Had to keep adding liquid ...

but how much is a cup??
It was on the side of the carton
I needed 250g of flour but did 225 and added the powder and it was exactly 250g - perfect!