Baking
Self-Rising Flour Conversion
Self-Rising Flour weighs 120g per US cup.
| Amount | Grams | Ounces |
|---|---|---|
| 1 cup | 120.0 g | 4.23 oz |
| 1/2 cup | 60.0 g | 2.12 oz |
| 1/4 cup | 30.0 g | 1.06 oz |
| 1 tbsp | 7.5 g | 0.26 oz |
| 1 tsp | 2.5 g | 0.09 oz |
| 100 g | 100.0 g | 3.53 oz |
Need a different amount? Use the full Ingredient Converter tool.
Self-rising flour shares all-purpose flour's exact cup weight (120g), which makes sense since it's built directly from all-purpose flour — millers simply blend in baking powder and salt at a standardized ratio (roughly 1½ teaspoons baking powder and ¼ to ½ teaspoon salt per cup of flour) before packaging it.
This premixed convenience is a genuinely regional US baking tradition, most closely associated with Southern biscuit-making, where self-rising flour's consistent, pre-balanced leavening is part of what gives classic biscuits their reliable rise without a baker needing to measure baking powder separately every time.
Using self-rising flour in a recipe that already calls for its own baking powder and salt is a real risk worth flagging clearly: the leavening doubles up, which can make a baked good rise too fast and then collapse, or taste soapy and metallic from excess baking powder — self-rising flour should replace both the flour AND the recipe's separately listed baking powder and salt, not just the flour alone.
Self-rising flour is all-purpose flour pre-blended with baking powder and salt, and its 125g-per-cup weight sits just slightly above plain all-purpose (120g) because of that added baking powder and salt mass — a small enough difference that most recipes treat the two as interchangeable by weight, though a recipe built around self-rising flour is also assuming its leavening is already built in, which matters more than the minor weight gap does.
Self-rising flour is especially common in Southern US biscuit and quick-bread recipes, where its consistent leavening ratio (typically about 1½ teaspoons baking powder and ¼ teaspoon salt per cup of flour) is part of what gives those recipes their reliable rise without a separate leavening measurement step.
Because its leavening is already blended in, using it in a recipe that also calls for separate baking powder or soda can over-leaven the bake unless the recipe is specifically written around it.
Frequently asked questions
Can I substitute self-rising flour for all-purpose flour in any recipe?
Only if you also remove the baking powder and salt the recipe calls for separately — otherwise the leavening doubles up, risking an overly puffed then collapsed texture or a soapy, metallic aftertaste from excess baking powder.
How can I make my own self-rising flour from all-purpose flour?
Whisk baking powder and salt directly into a cup of all-purpose flour, sifting the mixture a couple of times to distribute both evenly throughout — matching the standard commercial blend closely enough for most biscuit and quick-bread recipes to turn out the same way.
Does self-rising flour go bad faster than all-purpose flour?
Yes, somewhat — the baking powder mixed in loses potency over time even though the flour itself doesn't, so a bag of self-rising flour that's been open a long time may not leaven as well even if the flour itself still smells and looks fine.
Is self-rising flour common outside the US?
It's especially associated with UK and Southern US baking traditions — UK self-raising flour follows a similar premise, though the exact baking powder ratio and flour protein content can differ somewhat from US self-rising flour.
Why would a recipe specifically call for self-rising flour instead of just listing baking powder separately?
Mostly for consistency in recipes built around it, like classic Southern biscuits — the premixed ratio guarantees the same leavening-to-flour balance every single time a baker reaches for the bag, sidestepping a separate measuring step entirely.