self raising flour

Hi guys,
Self raising flour is not easily available in my area and I would like to know what would be a good substitution.
Thanks.

To make self rising flour: for each cup of all purpose flour add 1/2 tsp baking powder and 1/2 tsp salt.

:DThank you so much for your reply to my question. Am just off to bake a batch of scones using my new self raising flour. Thanks a lot!!