Flour Cups to Grams Calculator
A cup of flour is not always 120 g. Cake flour, whole wheat, almond and coconut flour all weigh different amounts per cup. Pick your flour, enter the cups, and get grams and ounces, with a comparison between King Arthur and USDA weights.
Flour cups to grams calculator
How to use the flour cups to grams calculator
- Pick your flour. Choose all-purpose, bread, cake, whole wheat, almond, coconut, rye, spelt, oat, rice, chickpea or gluten-free flour.
- Enter the cups. Type the number of cups. The calculator also lists 1/4, 1/3, 1/2, 2/3 and 3/4 cup.
- Choose the weight source. King Arthur is the default, and you can switch to USDA to see how much the two differ.
- Read grams and ounces. Use grams for a scale. Tablespoon and teaspoon weights are included for small amounts.
Flour weight per cup
King Arthur Baking weights for one level US cup:
| Flour | Grams per cup | Ounces |
|---|---|---|
| All-purpose | 120 g | 4.25 oz |
| Bread flour | 120 g | 4.25 oz |
| Cake flour | 120 g | 4.25 oz |
| Pastry flour | 106 g | 3.75 oz |
| Whole wheat | 113 g | 4 oz |
| Self-rising | 113 g | 4 oz |
| ‘00’ pizza flour | 116 g | 4.1 oz |
| Semolina | 163 g | 5.75 oz |
| Rye (medium) | 106 g | 3.75 oz |
| Spelt | 99 g | 3.5 oz |
| Oat flour | 92 g | 3.25 oz |
| White rice flour | 142 g | 5 oz |
| Almond flour | 96 g | 3.4 oz |
| Coconut flour | 128 g | 4.5 oz |
| Chickpea flour | 85 g | 3 oz |
| Gluten-free all-purpose | 156 g | 5.5 oz |
Worked examples
Two cups of all-purpose flour. 2 × 120 = 240 g, or 8.47 oz.
Three cups of bread flour. 360 g by King Arthur, 411 g by USDA. The difference is 51 g (14%), so a recipe tested with one source can turn out drier or wetter with the other.
Two cups of almond flour. 192 g, or 6.77 oz.
Half a cup of coconut flour. 64 g, or 2.26 oz.
Why flour weights vary
Flour settles in the bag and compresses when scooped. A spooned and levelled cup of all-purpose flour is about 120 to 125 g, while a cup dipped from the bag can be 140 g or more. This 15 to 20% swing is the most common reason cakes and cookies turn out dry. Recipes from the UK, Europe and Australia use grams, so cup conversions are rarely needed there. If a US recipe is vague, use 120 g per cup for cakes, cookies and muffins, which is King Arthur’s tested standard.
Gluten-free blends
Gluten-free all-purpose blends vary by brand because they mix rice, tapioca, potato and other starches. The 156 g per cup used here is King Arthur’s measure for its own blend, so check the packet for yours.
Related tools
If your ingredient is not flour, use the cups to grams calculator. For sweeteners see the sugar calculator, and to convert grams back into cups use the grams to cups calculator.
Frequently asked questions
How many grams is a cup of all-purpose flour?
King Arthur Baking uses 120 g (4¼ oz) per US cup, spooned and levelled. USDA lists 125 g. Many recipe sites round to 125 g.
Is a cup of bread flour heavier than all-purpose flour?
By King Arthur, no: both are 120 g. USDA lists bread flour at 137 g per cup, so about 14% more. That is likely a different measuring method, so pick one source and be consistent.
How many grams are in a cup of almond flour?
About 96 g per US cup, according to King Arthur. Almond flour is made from ground blanched almonds, so it is lighter than wheat flour and higher in fat.
Why is coconut flour heavier per cup than almond flour?
Coconut flour weighs about 128 g per cup, and it absorbs a lot of liquid, so it cannot be swapped 1:1 for other flours.
How do I measure a cup of flour correctly?
Fluff the flour, spoon it into a dry measuring cup without pressing, and sweep the top level with a knife. Dipping the cup into the bag compacts the flour and gives more than the recipe expects.
Do I need to sift flour before measuring?
Only if the recipe says "sifted flour" before the measuring. Sifted flour is lighter per cup. "1 cup flour, sifted" means measure then sift, while "1 cup sifted flour" means sift then measure.
Can I swap whole wheat for all-purpose flour by weight?
Use the same weight but expect denser baked goods. Start by replacing a quarter to half of the all-purpose flour, since whole wheat absorbs more water.
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Sources and references
About this calculator
Written and maintained by Rashid Mehmood, founder of CalcTen. The formulas are unit-tested against hand-worked examples, and the content is reviewed whenever product sizes or guidance change. Last updated 14 November 2026. See our editorial policy.
Ingredient weights are averages and vary with brand and how you measure, so weigh ingredients when accuracy matters. Food safety figures follow USDA and FoodSafety.gov guidance, and a food thermometer is the only reliable test of doneness. Read the disclaimer.