Cups of self-rising flour to grams runs on one number, 125 grams per cup. It is a measured property of this ingredient rather than a defined conversion, which is why a generic volume-to-weight tool cannot give you it.
The density behind that figure is 0.52834 g per mL, against 1.00 for water. A cup of water weighs 236.6 g and a cup of self-rising flour weighs 125 g, so this ingredient is 52.83% as heavy as the same volume of water — the single fact the whole page rests on.
A cup of self-rising flour is 125 g when it is measured the standard way, but how it gets into the cup changes the answer: between about 112.5 g and 150 g covers the range from lightly spooned to firmly packed. That 20% spread is larger than most of the adjustments recipes fuss over, and it disappears entirely the moment the ingredient is weighed instead.
Grams are the unit this conversion is really for. A domestic scale resolves to a gram, which is 0.8% of a cup of self-rising flour, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 4 cups, and a 1 kg pack 8.
How the figure is arrived at: The same weight per cup as all-purpose, because that is what it is — with baking powder and salt already blended through it.
The formula
cups- The amount of self-rising flour you are converting, in cups
125- Grams per cup for self-rising flour, from its density of 0.52834 g/mL
grams- The equivalent quantity in grams
How it works, step by step
- Enter the quantity in cups.
- It is multiplied by 125, the grams-per-cup figure for self-rising flour.
- The result appears in grams, with a second reading in oz beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
1/3 cup of self-rising flour in grams
A recipe calling for 1/3 cup of self-rising flour needs 41.6667 grams on the scale. The arithmetic is 0.333333 × 125 = 41.666667, and halving the recipe halves the weight to 20.8333 grams.
3/4 cup of self-rising flour in grams
Take 3/4 cup of self-rising flour: 0.75 × 125 gives 93.75 grams. Doubling the batch takes it to 187.5 grams, because the relationship is a straight proportion once the density is known.
3 cup of self-rising flour in grams
Take 3 cup of self-rising flour: 3 × 125 gives 375 grams. Doubling the batch takes it to 750 grams, because the relationship is a straight proportion once the density is known.
How to read your score
Frequently asked questions
How many grams are in 1 cup of self-rising flour?
One cup of self-rising flour is 125 grams. Half that quantity is 62.5 grams and double it is 250 grams, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of self-rising flour not 236 g like water?
Because weight per cup depends on what is in the cup. Self-rising flour has a density of 0.52834 g per mL where water has 1.00, so a cup of it weighs 125 g rather than 236.6 g. That is a difference of 111.6 g per cup, and it is the reason a single volume-to-weight factor cannot be applied to every ingredient.
Does how I measure it change the weight?
Yes, and by more than most people expect. Handling changes the weight of a cup of self-rising flour by roughly 20% — about 12.5 g either side of 125 g — because the same weight per cup as all-purpose, because that is what it is — with baking powder and salt already blended through it. Weighing removes the question entirely.
Is a fluid ounce of self-rising flour the same as an ounce?
No. A fluid ounce is a volume — one eighth of a US cup, 29.57 mL — and an ounce is a weight. One fluid ounce of self-rising flour weighs 0.5512 oz, so the two readings differ by 44.9%. They coincide only for something with the density of water, and then only roughly.
Is this a US cup or a metric cup?
US customary: 236.59 mL, which is the cup every US recipe means. A metric cup is 250 mL, so the same cup of self-rising flour would weigh 132.09 g instead of 125 g — 7.09 g more, or 5.67%. Australian and some European recipes use the metric cup, and the difference is large enough to matter in baking.
Do I need a scale for this, or will measuring cups do?
A scale, if the result matters. Volume measuring carries a spread of about 20% for self-rising flour — roughly 25 g on a 125 g cup — while a domestic scale is accurate to a gram or two. For anything where the ratio of ingredients drives the outcome, bread and pastry above all, weigh it.
How many cups of self-rising flour is 500 g?
500 g of self-rising flour is 4 cups — 0.008 cups to one gram, so 500 × 0.008 = 4. Going that way is a division by 125, or a multiplication by 0.008 if you prefer.
Self-rising flour in cups and grams
| Cups | Grams | Unrounded |
|---|---|---|
| 1/8 cup | 15.625 g | 15.625 |
| 1/4 cup | 31.25 g | 31.25 |
| 1/3 cup | 41.6667 g | 41.66666667 |
| 1/2 cup | 62.5 g | 62.5 |
| 2/3 cup | 83.3333 g | 83.33333333 |
| 3/4 cup | 93.75 g | 93.75 |
| 1 cup | 125 g | 125 |
| 1 1/2 cup | 187.5 g | 187.5 |
| 2 cup | 250 g | 250 |
| 3 cup | 375 g | 375 |
| 4 cup | 500 g | 500 |
Based on 125 g per cup of self-rising flour. One cup of self-rising flour is 125 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 125 g | 4.41 oz | 236.6 mL |
| 3/4 cup | 93.75 g | 3.31 oz | 177.4 mL |
| 2/3 cup | 83.33 g | 2.94 oz | 157.7 mL |
| 1/2 cup | 62.5 g | 2.2 oz | 118.3 mL |
| 1/3 cup | 41.67 g | 1.47 oz | 78.86 mL |
| 1/4 cup | 31.25 g | 1.1 oz | 59.15 mL |
| 1 tbsp | 7.812 g | 0.276 oz | 14.79 mL |
| 1 tsp | 2.604 g | 0.0919 oz | 4.929 mL |
US customary measures: 1 cup = 236.59 mL, 1 tbsp = 14.79 mL, 1 tsp = 4.93 mL.
| Ingredient | Grams per cup | Ounces per cup | Density (g/mL) |
|---|---|---|---|
| Tapioca starch | 120 g | 4.233 oz | 0.5072 |
| Powdered sugar | 120 g | 4.233 oz | 0.5072 |
| All-purpose flour | 125 g | 4.409 oz | 0.5283 |
| Self-rising flour (this page) | 125 g | 4.409 oz | 0.5283 |
| Bread flour | 127 g | 4.48 oz | 0.5368 |
| Cornstarch | 128 g | 4.515 oz | 0.541 |
| Cornmeal | 138 g | 4.868 oz | 0.5833 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.