Flour Converter
Bread flour is not cake flour.
Flour Converter
Convert flour between cups and grams, with a different density for each type of flour.
Flours differ by milling and protein content, which changes how much fits in a cup. Bread flour is denser than cake flour, so the same cup weighs more.
Flour equivalent
120g
All-purpose flour · 120 g/cup · 10–12% protein
- Grams
- 120 g
- Cups
- 1
- Tablespoons
- 16
- Ounces
- 4.23
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What This Calculator Does
The Flour Converter converts between cups and grams for all-purpose, bread, cake, whole-wheat, and self-raising flour. Each type has its own weight per cup, because milling, protein content, and particle size all change how much flour fits in the same volume.
How It Works
The converter looks up the grams-per-cup figure for the flour you choose, then multiplies or divides by it. Cups to grams is a multiplication; grams to cups is a division. Tablespoons and ounces follow from the same weight, using 16 tablespoons per cup and 28.35 g per ounce.
Example
One cup of all-purpose flour is about 120 g, so 500 g is about 4.17 cups. The same 500 g of bread flour at 127 g per cup is about 3.94 cups. Using the wrong flour’s density overshoots or undershoots the flour by roughly 6%.
Formula
grams = cups × grams per cupcups = grams ÷ grams per cuptbsp = cups × 16oz = grams ÷ 28.3495Reading the Results
Grams
The weight to aim for on a scale. It is the reliable figure; the cup equivalent depends on how the flour was settled into the measure.
Cups
The volume equivalent for the selected flour. If you must use cups, spoon the flour in and level it rather than scooping, or you will use more than the recipe intends.
Sources and References
King Arthur Baking — Ingredient Weight Chart
Grams per cup for all-purpose, bread, cake, and whole-wheat flour
The source of the flour-specific weights used by the converter.
USDA FoodData Central — Wheat flour
Composition of common flour types
Explains the protein and moisture differences behind the weight variation.
NIST Handbook 44
US cup and ounce definitions
Fixes the volume and weight units used in the conversion.
References identify the method or data behind this calculator. Where a standard or tariff changes, the current edition applies, and the assumptions stated above take precedence over a remembered figure.
Frequently Asked Questions
Why do different sources give different grams per cup for flour?
Because the weight depends on how the flour is put into the cup. A lightly spooned cup of all-purpose flour is about 120 g, while a scooped cup can reach 140 g or more. Professional bakers weigh for exactly this reason.
Can I substitute bread flour for all-purpose?
Yes, but the result changes. Bread flour has more protein, absorbs more water, and produces a chewier crumb. If you swap by volume rather than weight, you may also add more flour than intended, because bread flour is denser per cup.
What is self-raising flour?
All-purpose flour with baking powder and salt already added, common in the UK and Australia. If a US recipe calls for it, you can make your own by adding about 1½ teaspoons of baking powder and ¼ teaspoon of salt per cup of all-purpose flour.
Should I sift flour before measuring?
Sifting aerates the flour and lowers its weight per cup, which is why older recipes that assume sifted flour can come out dry if you use unsifted. Weighing avoids the question entirely.