2 Cups of Flour in Grams

Two cups of all purpose flour weighs 240 grams

Put a mixing bowl on a digital scale, press tare, and spoon in flour until the display reads 240 g. That is the weight two US cups of all purpose flour should hit. King Arthur Baking lists a single cup at 120 g on its ingredient weight chart, so 2 x 120 = 240 g. Gold Medal's all purpose flour panel arrives at the same number from the other end of the bag: one serving is 1/4 cup and 30 g, and 4 x 30 = 120 g for the full cup.

USDA FoodData Central record 168936 takes a slightly different measurement. Its household portion for enriched all purpose flour is one cup at 125 g, which puts two cups at 2 x 125 = 250 g. Both numbers describe ordinary white flour. The gap comes from how the cup was filled and who did the filling.

The two columns sit 10 g apart at the two cup mark, since 250 - 240 = 10, and 250 / 240 = 1.042, so the USDA cup carries about 4 percent more flour than the chart cup. In a muffin or a pancake batter that gap falls inside the rounding of the butter. In a bread formula it is large enough to change how the dough feels.

Why two cups can land anywhere from 220 to 260 grams

Flour is a powder, and a cup is a shape. Fill the same cup twice and the second one can hold more flour without any change to the cup itself. A cup that was sifted and spooned gently settles near 110 g. A cup dipped straight into the bag and swept level sits closer to 130 g. Double both numbers and the same two cups run from 220 g to 260 g, a spread of 40 g, which is a third of a cup of flour by weight (40 / 120 = 0.33).

That spread is 18 percent of the light end: 260 / 220 = 1.18. In a cake it is the difference between a tender crumb and a dry one, and the ingredient list never changed.

Four things move the number:

• How the cup is filled. Spooning leaves air between the particles. Dipping presses the flour against the sides of the cup.
• How fresh the bag is. Flour settles in transit and again in the pantry, so the bottom of a bag is denser than the top.
• The mill. A fine grind packs tighter than a coarse one, and the protein level changes how the flour behaves in the cup.
• Humidity. A muggy kitchen adds moisture weight, and a dry winter kitchen takes some away.

The 120 g chart figure sits in the middle of that range, which is why it is the number worth memorizing. The USDA 125 g portion is close enough that either one works in a muffin. Only when a recipe leans on exact flour weight, such as a sourdough formula or a macaron, does the 5 g gap start to matter.

The 8 fluid ounce trap behind most bad conversions

A US cup holds 8 fluid ounces. That is a volume fact, and it holds for water, milk and flour alike. The weight is what changes. Two cups of water weigh about 473 g because water is dense. Two cups of flour weigh 240 g because flour is mostly air pockets held together by starch.

The NIST Guide to the SI, Appendix B.8 gives the customary cup as 236.588 mL, so two cups is 473.2 mL, or 16 fl oz. A cook who reads 16 fl oz and converts it at 1 oz = 28.35 g gets 454 g, then wonders why the dough fights back. That is 454 / 240 = 1.89, close to twice the flour the recipe wanted.

Keep two separate columns in your head. Volume: 1 cup = 8 fl oz = 236.6 mL. Weight: 1 cup of all purpose flour = 120 g = 4.2 oz. The two columns share a unit name and nothing else, and the ounce on a flour bag is always the weight ounce.

Two cups plus two tablespoons, and other amounts recipes print

Recipes rarely stop at whole cups. A cookie formula might ask for 2 cups plus 2 tablespoons, and a cake for 2 1/3 cups. Since a cup divides into 16 level tablespoons, one tablespoon of flour is 120 / 16 = 7.5 g on the chart standard, and the odd amounts convert without much fuss.

The first row is the one to keep: 2 tablespoons = 15 g. A recipe that calls for 2 cups plus 2 tablespoons wants 240 + 15 = 255 g, and 255 g is a different weigh-out from a flat 250 g. A third of a cup is 120 / 3 = 40 g, and two thirds is 80 g, so the fractions all land on round numbers once the cup is 120.

Doubling stays clean. Four cups is 480 g, six cups is 720 g, and half of two cups is 240 / 2 = 120 g. When a recipe scales by a factor of two or three, the gram column scales by the same factor and stays exact.

How to hit 240 grams with a scale, and without one

A basic digital scale reads to 1 g and settles the question in one move. The order matters: bowl on the scale, press tare so the display returns to zero, then add flour with a spoon until the readout says 240. Do not pour from the bag, because the flow is too fast to stop at the right number, and do not tap the bowl to settle the flour down.

Without a scale, use the spoon and level method and count. Two cups is 32 level tablespoons, and 32 x 7.5 = 240 g. Spoon flour into a dry measuring cup, then sweep the flat back of a knife across the rim. Do not tap the cup on the counter and do not press the flour down. Those two habits add 10 to 20 g per cup, which turns 240 g into 260 g or worse.

A scale that reads 239 or 241 g is fine. Home ovens swing by 15 degrees, butter weighs in at whatever the stick says, and a 1 g error in flour is far below the noise of the rest of the recipe. Worry about the scoop, not the last gram.

If a recipe prints both cups and grams, trust the grams. The gram column was written by someone standing at a scale, and it is the version the test kitchen used when the recipe was approved for print.

Whisking the flour first fluffs it, and a whisked cup settles near 110 g. Fluff, whisk, spoon and level is the sequence pastry chefs teach, and it lands close to the chart weight without any gadget. Keep a small notebook with gram weights for the flours in your cupboard, because the label panel rarely prints them and memory drifts. Dump leftovers back into the canister, wipe the counter, and weigh the next batch the same way, so two cakes pulled from one bag bake alike.

Calories, carbs and protein in two cups of flour

Nutrition follows weight, so 240 g of flour carries 2.4 times the values printed per 100 g. USDA puts enriched all purpose flour at 364 kcal, 76.3 g of carbohydrate and 10.3 g of protein in every 100 g.

Each cell is the per 100 g figure times 2.4, since 240 / 100 = 2.4. Carbohydrate lands at 240 x 0.763 = 183 g, protein at 240 x 0.103 = 24.7 g, and fiber at 240 x 0.027 = 6.5 g. Calories come out at 240 x 3.64 = 874 kcal, and 240 / 125 = 1.92, so a two cup scoop that ran heavy at 250 g would add about 36 kcal.

A two cup batch of pancake batter therefore starts near 874 calories before eggs, milk or butter join the bowl. A 5 lb bag holds 2,268 g, which is 2,268 / 240 = 9.45, so nine full batches with a little left over, a useful count when you bake for a crowd and shop once.

Cup standards outside the US

The 240 g answer assumes the US customary cup. Australia, Canada and much of Europe use a 250 mL metric cup, and the FDA uses a 240 mL cup for nutrition labels. A larger cup holds more flour when the scoop is the same, so the weight rises with the volume.

Each row is one line of scaling: 120 x 240 / 236.588 = 121.7 and 120 x 250 / 236.588 = 126.8. A recipe from Sydney that asks for two cups wants 253.6 g, while the same words printed in Ohio want 240 g. The 13.6 g difference is about a tenth of a cup of flour, and 253.6 / 240 = 1.057, so the metric bake carries 5.7 percent more flour for the same liquid.

Match the cup to the country the recipe came from, then weigh. That single habit removes the largest variable in the whole conversion.