Flour Cups to Grams Converter
Convert flour cups to grams — or grams back to flour cups — in seconds. Pick your flour, type an amount like “1 1/2”, and get the exact weight. Free, instant, no sign-up.
Convert Cups of Flour to Grams
Tip: fractions work too — type 1/2, 1 1/2 or 2.25.
Result
Quick amounts — tap to fill:
Quick weights — tap to fill:
How to Use This Tool
- Pick a direction. “Cups → Grams” converts a volume to a weight; “Grams → Cups” converts a weight back to cups.
- Type your amount. Whole numbers, decimals, and kitchen fractions all work — try 1, 2.5, 1/2, or 1 1/2.
- Choose your flour. All-purpose, bread, whole wheat, cake, oat, almond, and 9 more — each uses its own grams-per-cup weight.
- Set the cup size. US cup is the default; switch to metric or imperial if your recipe comes from outside the US.
- Read the result. The answer appears instantly with the working shown, plus ounces and kilograms for good measure.
Why Use This Flour Cups to Grams Converter?
- Flour-specific accuracy. A generic converter assumes one number for every flour. This one uses the official King Arthur Baking chart — 120 g for all-purpose, 113 g for whole wheat, 92 g for oat, 163 g for semolina, and more.
- Fraction-friendly input. Recipes speak in fractions, so the tool does too: 1/2, 1 1/2, and 2 1/4 all convert directly with no decimal math on your side.
- Both directions. American recipe in cups? Convert to grams. European recipe in grams? Convert back to cups. One tool covers the whole journey.
- Cup-size aware. US, metric, and imperial cups are different volumes. Picking the right one keeps international recipes honest.
- Zero friction. The answer shows the moment you type — no account, no pop-up, no waiting. It works just as fast on a phone mid-bake as on a desktop.
- Better bakes. Weighing flour removes the 20–30 g swing that cup-scooping introduces, so cakes rise evenly and bread doughs behave.
Who Is This Converter For?
- Home bakers converting American cup recipes to grams for a kitchen scale — the single biggest upgrade you can make to your baking.
- Bread and sourdough bakers who work in baker’s percentages and need every flour weighed, from bread flour to whole wheat to rye.
- Cake and pastry makers where a few extra grams of flour change the crumb — cake, pastry, and almond flour weights are all built in.
- Recipe developers and food bloggers writing recipes for a global audience and publishing both cup and gram amounts.
- Gluten-free bakers juggling rice, coconut, oat, and gluten-free blend flours that each weigh very differently per cup.
- Cooking students and new bakers learning why weight beats volume — with the working shown for every conversion.
How Many Grams Are in a Cup?
It depends on the ingredient
A cup measures volume, not weight. One cup of all-purpose flour weighs 120 grams, but the same cup of sugar weighs about 200 g and a cup of butter weighs 227 g.
This is the single most misunderstood idea in baking: cups and grams measure different things. A cup tells you how much space an ingredient fills; grams tell you how much of it there is. Because every ingredient packs differently — flour is airy, sugar is dense, butter is solid — each one needs its own conversion number. That is why a “universal” cups-to-grams factor does not exist, and why this converter asks which flour you are measuring before it answers.
US and UK Cup Sizes
Not every cup is the same cup, either. The US customary cup holds 236.6 ml, the metric cup used in Australia and many international recipes holds 250 ml, and the old UK imperial cup holds 284.1 ml — roughly 20% more than the US cup. Modern British recipes usually skip cups entirely and list grams instead, which is one more reason to convert. Watch the cup size your recipe assumes: 1 US cup of all-purpose flour = 120 g, 1 metric cup = 126.8 g, 1 imperial cup = 144.1 g.
How Much Is 1 Cup of Flour in Grams?
120 grams
One US cup of all-purpose flour weighs 120 grams — the figure on the King Arthur Baking ingredient weight chart.
That 120 g assumes the spoon-and-level method: fluff the flour in its container, spoon it lightly into the measuring cup, and sweep the top level with a straight edge. Scoop directly from the bag and the same cup can pack in 140 g or more — enough to quietly ruin a cake.
How Many Grams Are in a Cup of Flour?
The same cup weighs a different amount for every flour, because each flour has its own density. Bread flour and cake flour also land at 120 g per cup on the King Arthur chart; whole wheat and self-rising flour weigh 113 g; rye and pastry flour weigh 106 g; light oat flour is just 92 g; and dense semolina packs 163 g into the same cup. The full table below lists all fifteen.
All-Purpose Flour Cups to Grams
All-purpose flour is the default in most recipes, so this all purpose flour cups to grams table covers the amounts you will actually reach for — from a quarter cup to five cups, each converted at the standard 120 g per US cup. Tap any value to load it into the converter above.
| All-purpose flour | Grams | Ounces |
|---|---|---|
| 1/8 cups | 15 g | 0.529 oz |
| 1/4 cups | 30 g | 1.058 oz |
| 1/3 cups | 40 g | 1.411 oz |
| 1/2 cups | 60 g | 2.116 oz |
| 2/3 cups | 80 g | 2.822 oz |
| 3/4 cups | 90 g | 3.175 oz |
| 1 cup | 120 g | 4.233 oz |
| 1 1/4 cups | 150 g | 5.291 oz |
| 1 1/2 cups | 180 g | 6.349 oz |
| 1 3/4 cups | 210 g | 7.408 oz |
| 2 cups | 240 g | 8.466 oz |
| 2 1/4 cups | 270 g | 9.524 oz |
| 2 1/2 cups | 300 g | 10.58 oz |
| 3 cups | 360 g | 12.7 oz |
| 3 1/2 cups | 420 g | 14.82 oz |
| 4 cups | 480 g | 16.93 oz |
| 5 cups | 600 g | 21.16 oz |
Common All-Purpose Flour Measurements
Memorize the handful you use every week: 1/4 cup = 30 g, 1/3 cup = 40 g, 1/2 cup = 60 g, 3/4 cup = 90 g, 1 cup = 120 g, 1 1/2 cups = 180 g, 2 cups = 240 g, 2 1/2 cups = 300 g, 3 cups = 360 g, 4 cups = 480 g, 5 cups = 600 g. Odd amounts from scaling follow the same rule — multiply cups by 120. That is how you get 2.25 cups of flour = 270 g, 2.5 cups = 300 g, 3.5 cups = 420 g, and 1.75 cups = 210 g.
Quick answers: 1 1/2 cup flour in grams = 180 g · 2 cups of flour in grams = 240 g · 3 cups of flour in grams = 360 g · 4 cups of flour in grams = 480 g · 5 cups of flour in grams = 600 g · 1.75 cups flour to grams = 210 g · 2.25 cups flour to grams = 270 g · 2.5 cups flour to grams = 300 g · 3.5 cups flour to grams = 420 g.
How to Convert Cups of Flour to Grams
- Take your cups. Read the recipe amount — say, 2 cups of all-purpose flour.
- Multiply by the flour’s grams per cup. 2 × 120 g = 240 g.
- Adjust for cup size when needed. Using a metric cup? Multiply by 250 ÷ 236.6 = 1.057 as well.
- Weigh it. Tare your bowl on a digital scale and add flour until the display reads the target grams.
grams = cups × grams-per-cup × (cup ml ÷ 236.6)
Example: 2.5 metric cups of bread flour = 2.5 × 120 × 1.057 = 317 g
Flour Weight to Volume Conversion Table
Every flour in the converter, at 1 cup, 1/2 cup, and 2 cups — weights from the King Arthur Baking ingredient weight chart (US cups, spooned and leveled). Tap any value to load it into the converter.
| Flour type | 1 cup | 1/2 cup | 2 cups |
|---|---|---|---|
| All-purpose flour | 120 g | 60 g | 240 g |
| Bread flour | 120 g | 60 g | 240 g |
| Cake flour | 120 g | 60 g | 240 g |
| Buckwheat flour | 120 g | 60 g | 240 g |
| Self-rising flour | 113 g | 56.5 g | 226 g |
| Whole wheat flour | 113 g | 56.5 g | 226 g |
| Pastry flour | 106 g | 53 g | 212 g |
| Rye flour | 106 g | 53 g | 212 g |
| Oat flour | 92 g | 46 g | 184 g |
| Almond flour | 96 g | 48 g | 192 g |
| Rice flour (white) | 142 g | 71 g | 284 g |
| Coconut flour | 128 g | 64 g | 256 g |
| Spelt flour | 99 g | 49.5 g | 198 g |
| Gluten-free all-purpose flour | 156 g | 78 g | 312 g |
| Semolina flour | 163 g | 81.5 g | 326 g |
Should You Measure Flour by Weight or Volume?
Measure by weight — every time the result matters. A cup of flour can swing 20–30 g depending on how you fill it: scooping straight from the bag packs it down, while spooning keeps it airy. That swing is the difference between tender and tough in cakes, between chewy and dense in cookies, and between a good crumb and a brick in bread. Volume works for weeknight cooking; weight is what makes baking repeatable.
Why Professional Bakers Weigh in Grams, Not Cups
Professional bakers abandoned cups decades ago, and for practical reasons, not snobbery. Grams are identical everywhere — a gram in New York equals a gram in London, while a “cup” changes by country. Grams scale cleanly: doubling 240 g is trivial, doubling “2 cups minus 2 tablespoons” invites error. And grams ignore humidity, settling, and packing, which all quietly change what a cup of flour weighs. The USDA and serious baking references list flour by weight for exactly these reasons.
Tips for Measuring All-Purpose Flour
- Spoon, don’t scoop. Fluff the flour, spoon it lightly into the cup, and level the top with a straight edge — the spoon-and-level method the 120 g figure is based on.
- Never pack it down. Tapping or pressing the cup can add 30 g of flour you didn’t intend.
- Sift after measuring, not before — unless the recipe says “1 cup sifted flour,” which means sift first.
- Weigh when it counts. A basic digital scale costs less than a bag of good flour and beats every cup technique ever invented.
- Stay in one system. Don’t mix cups and grams halfway through a recipe; pick weight or volume and commit.
Cup Size Variations for All-Purpose Flour
Same flour, different cup, different grams: 1 US cup of all-purpose flour = 120 g, 1 metric cup = 126.8 g, 1 imperial cup = 144.1 g. If a recipe doesn’t say which cup it means, assume the US cup for American recipes and the metric cup for Australian ones — or sidestep the question entirely and weigh in grams.
Cups to Grams by Ingredient
Flour is not the only ingredient where cups mislead. Because each ingredient has its own density, every one needs its own conversion number — which is also why you should never convert sugar or butter with a flour number.
How Many Grams in a Cup of Flour?
120 grams of all-purpose flour per US cup (see the flour table above for all fifteen flours).
How Many Grams in a Cup of Sugar?
How much is 1 cup of sugar in grams? About 200 grams of granulated sugar per US cup — in other words, 1 cup sugar in grams is about 200 g (198 g on the King Arthur chart, which most charts round to 200 g). Packed brown sugar is heavier at 213 g per cup.
How Many Grams in a Cup of Butter?
How much is 1 cup of butter in grams? 227 grams per US cup — exactly two sticks at 113.4 g each. For the full breakdown, see the butter converter.
How Many Grams in a Cup of Cocoa Powder?
About 84 grams of unsweetened cocoa powder per US cup — cocoa is far lighter than flour, so never substitute the numbers.
How Many Grams in a Cup of Rice?
About 198 grams of uncooked long-grain rice per US cup. Cooked rice is a different ingredient entirely — always check whether your recipe means raw or cooked.
How Many Grams in a Cup of Milk or Water?
About 244 grams of whole milk and 236 grams of water per US cup. Liquids are the one case where cups behave, because a milliliter of water weighs (almost) exactly a gram.
| Ingredient | 1 cup | 1/2 cup | 2 cups |
|---|---|---|---|
| All-purpose flour | 120 g | 60 g | 240 g |
| Granulated sugar | 200 g | 100 g | 400 g |
| Butter | 227 g | 113.5 g | 454 g |
| Cocoa powder (unsweetened) | 84 g | 42 g | 168 g |
| Whole milk | 244 g | 122 g | 488 g |
| Water | 236 g | 118 g | 472 g |
| Uncooked long-grain rice | 198 g | 99 g | 396 g |
Grams to Cups Conversion Chart
Converting back — from a metric recipe to American cups — is one division: cups = grams ÷ 120 for all-purpose flour. The converter’s Grams → Cups mode does it instantly, and the chart below covers the weights recipes actually call for. Tap any value to load it into the converter.
| Grams of all-purpose flour | Cups | Ounces |
|---|---|---|
| 25 g | 0.208 cups | 0.882 oz |
| 50 g | 0.417 cups | 1.764 oz |
| 60 g | 1/2 cups | 2.116 oz |
| 100 g | 0.833 cups | 3.527 oz |
| 113 g | 0.942 cups | 3.986 oz |
| 120 g | 1 cups | 4.233 oz |
| 125 g | 1.042 cups | 4.409 oz |
| 180 g | 1 1/2 cups | 6.349 oz |
| 200 g | 1.667 cups | 7.055 oz |
| 240 g | 2 cups | 8.466 oz |
| 250 g | 2.083 cups | 8.818 oz |
| 300 g | 2 1/2 cups | 10.58 oz |
| 360 g | 3 cups | 12.7 oz |
| 480 g | 4 cups | 16.93 oz |
| 500 g | 4.167 cups | 17.64 oz |
| 600 g | 5 cups | 21.16 oz |
Frequently Asked Questions
How many grams are in a cup of flour?
120 grams in one US cup of all-purpose flour, measured spooned and leveled. The number changes with the flour: whole wheat flour is 113 g per cup, oat flour is 92 g, rice flour is 142 g, and semolina is 163 g. Select your flour in the converter above for the exact figure.
How many grams is one cup of flour?
One cup of all-purpose flour is 120 grams — the figure on the King Arthur Baking ingredient weight chart and the standard most American recipes are developed with. That assumes the spoon-and-level method: fluff the flour, spoon it lightly into the cup, and level it off. Scooping straight from the bag can pack up to 140 g into the same cup.
How much is 1/2 cup of flour in grams?
Converting 1/2 cup to grams gives 60 g of all-purpose flour — exactly half of the 120 g per-cup weight. The same rule scales to any amount: 1 1/2 cups is 180 g, 2 cups is 240 g, and 2.5 cups is 300 g.
What is 1 cup of sugar in grams?
About 200 grams of granulated sugar (198 g on the King Arthur chart — most charts round it to 200 g). Packed brown sugar is heavier at 213 g per cup, while a cup of butter weighs 227 g. Sugar and flour need different conversion numbers because every ingredient has its own density.
Should I measure flour by weight or volume?
By weight, whenever the result matters. A cup of flour can swing 20–30 g depending on how you fill it, which is enough to turn a tender cake dense or a soft dough stiff. A digital kitchen scale removes that swing entirely — 120 g is 120 g whether the flour is fluffy, settled, or humid.
How do I convert cups to grams without a kitchen scale?
Multiply your cups by the flour’s grams per cup: for all-purpose flour, cups × 120. So 2.25 cups of flour is 270 g and 3.5 cups is 420 g. For other flours use the flour weight table on this page, or let the converter above do the multiplication for you.
Does the type of flour change how many grams are in a cup?
Yes — noticeably. A cup is a volume, and flours pack differently: oat flour weighs 92 g per cup, almond flour 96 g, rye and pastry flour 106 g, whole wheat 113 g, and dense semolina 163 g. That is why this converter asks which flour you are using instead of assuming one number.
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