Self-Rising Flour Calculator

About this calculator

Self-rising flour is plain (all-purpose) flour with a leavening agent and salt already mixed in, and the standard home-baking ratio is about 1½ teaspoons of baking powder and ¼ teaspoon of salt per cup of all-purpose flour. Recipes that call for self-rising flour rely on this built-in leavening instead of a separately measured amount of baking powder, so substituting one for the other without adjusting the recipe throws off both rise and salt level.

Home bakers use this conversion when a recipe calls for self-rising flour but their pantry only has all-purpose, or the reverse — needing to omit the baking powder and salt from a recipe when using store-bought self-rising flour — because getting the ratio wrong produces bread or biscuits that either fail to rise properly or taste oddly salty or flat.

This calculator takes the amount of all-purpose flour you're using and returns exactly how much baking powder and salt to whisk in, so your substitute self-rising flour behaves just like the store-bought version.