Self-raising flour recipe calculator

How much baking powder do you need?

If you're baking from a British, English, or Commonwealth cookbook, the recipe might well call for self-raising flour. Note that this is different from US self-rising flour, in that it has more baking powder and no salt.

If the recipe calls for:
  •   g of self-raising flour
Then use...
  •   g of all purpose flour, and
  •   g of baking powder

Happy baking!


Show workings
The calculation assumes self-raising flour is 5.5% baking powder and 94.5% all purpose flour. The references I found said either 1 cup of flour to 2 teaspoons of baking powder, or 150g flour to 2 teaspoons of baking powder. 5.5% ended up seeming reasonable, and seems to work well.