Good afternoon. Are you still interested in making a pizza employing "SELF RAISING FLOUR"
If so I have a recipe that a major pizza chain uses that employs BAKING POWDER & A/P flour as well as other flours. You can easily make your own S/R flour just from the info that PETER provided. or I would be happy to do the math for you.
One thing, I do not nor do knowledgeable bakers recommend the use of chemical leaveners where YEAST is used...
WHY.... It toughens the yeasted lean bread dough. However, Beauty is in the eye of the be-holder. I must be truthful, about 4 years ago I did this recipe with the baking powder & A/P flour Together with bread flour & I remember remarking to my self that considering the use of powder & the A/P flour it really wasn't a bad pizza dough. I thought you would like to know. Good luck & have a nice day.