Flour Grams to Cups Converter
100g of all-purpose flour is about 0.83 US cups, and 250g is about 2.08 cups.
Enter your flour weight in the converter to check another amount. These estimates use 120g per cup, with the flour fluffed, spooned into the measuring cup, and leveled.
Flour grams-to-cups conversion chart
Find your recipe quantity below. All figures are for all-purpose flour at 120g per US Customary cup, rounded to two decimal places.
| Flour weight | Approximate US cups |
|---|---|
| 25g | 0.21 |
| 30g | 0.25 |
| 50g | 0.42 |
| 60g | 0.5 |
| 100g | 0.83 |
| 120g | 1 |
| 125g | 1.04 |
| 150g | 1.25 |
| 180g | 1.5 |
| 200g | 1.67 |
| 240g | 2 |
| 250g | 2.08 |
| 300g | 2.5 |
| 400g | 3.33 |
| 500g | 4.17 |
| 750g | 6.25 |
| 1,000g | 8.33 |
These are decimal cups. For familiar measurements, 0.25 cup is ¼ cup, 0.5 cup is ½ cup, and 1.25 cups is 1¼ cups. Do not read 0.83 cup as ¾ cup: those are different amounts.
Want a reference you can keep in the kitchen? See our printable conversion chart.
How to convert flour grams to cups
Divide the flour weight by the grams-per-cup reference:
Cups of flour = grams of flour ÷ 120
For example, a recipe calling for 300g of all-purpose flour works out to:
Use the full value during the calculation, then round the answer. Rounding the ingredient weight or an intermediate result can introduce an unnecessary difference.
This formula uses our default reference. If you select another cup standard, use the corresponding adjusted grams-per-cup value rather than continuing to divide by 120. See our conversion methodology for the calculation rules.
Converting flour cups back to grams
Multiply the number of cups by 120 under the same reference:
Grams of flour = US cups × 120
For example, 1½ cups gives 1.5 × 120 = 180g. You can also use the cups-to-grams converter and select all-purpose flour.
How to measure flour without a scale
When you need to use cups, keep the filling method consistent:
- Loosen the flour in its container with a spoon.
- Spoon it gently into a dry measuring cup, filling slightly above the rim.
- Level the top with a straight edge, without pressing the flour down.
This follows King Arthur's flour-measuring guidance. Our guide on how to measure flour explains the technique in more detail.
Scooping directly with the cup or packing the flour can change the amount that fits inside. A conversion chart cannot compensate for an unknown filling method. If your recipe already gives grams, weighing that amount is the more dependable option.
Does the cup size change the answer?
Yes. A 250mL cup has more space than a US Customary cup, which is about 236.6mL. A fixed weight of flour therefore fills fewer of the larger cups.
| Cup setting | Cup volume | Calculated reference grams per cup | 100g flour in cups |
|---|---|---|---|
| US Customary | About 236.6mL | 120g | 0.83 |
| US Legal | 240mL | 121.7g | 0.82 |
| Metric | 250mL | 126.8g | 0.79 |
The adjusted weights are estimates calculated by volume scaling, assuming the same flour and filling method. They are not separate kitchen measurements. NIST lists the US cup volume, and the FDA uses 240mL for a nutrition-labeling cup.
Check your recipe's stated standard. Our cup-size guide explains the differences.
Why do flour conversion charts disagree?
Compare the assumptions before choosing an answer. A chart may use a different flour, filling method, cup volume, or reference weight.
Even a small change in the reference changes the calculation. As a mathematical example, 250g divided by 120g per cup gives about 2.08 cups; divided by 125g per cup, it gives 2 cups. That example illustrates the effect of different assumptions—it does not make the two references interchangeable.
Use the weight supplied by your recipe when available. Otherwise, choose a clearly stated reference and keep the flour type, cup size, and measuring method consistent. You can compare the ingredients used on this site in our grams-per-cup reference table.
Questions about measuring flour
Should I sift flour before or after measuring?
Follow the wording in the recipe. “1 cup sifted flour” calls for sifting before measuring. “1 cup flour, sifted” calls for measuring first, then sifting. KitchenAid explains this distinction in its sifting guide.
This page does not provide a separate sifted-flour weight. Do not assume its 120g reference applies to every sifting method.
Can I use this chart for other flour types?
This chart is for all-purpose flour. Do not automatically apply it to whole-wheat, cake, almond, or gluten-free flour. Check the recipe or a reference for the exact flour you are using.
What if I cannot measure the decimal cup result?
Use the largest familiar cup measure below the result, then account for the remainder with compatible measuring spoons. Avoid simply dropping the remainder from the recipe. If the amount is awkward to measure—or the recipe already lists grams—a kitchen scale is usually the simpler choice.
Can I use a mug instead of a measuring cup?
Only if you know its volume and can measure the required amount reliably. A mug's size may differ from the cup assumed by the recipe, and an unmarked mug makes partial cups harder to judge.
Convert another ingredient
Flour's reference weight does not apply to every ingredient. Use the granulated sugar converter or butter converter for those ingredients, or return to the grams-to-cups converter to choose another option.