How Many Grams in a Cup? Every Ingredient, One Chart

Search "how many grams in a cup" and the internet will hand you a number — usually 240, sometimes 250. Every one of those answers is wrong for almost everything in your kitchen, because the question is missing a word. A cup is a unit of volume: 240 milliliters of space, nothing more. A gram is a unit of weight. The bridge between them is density — how much mass a particular ingredient fits into that space — and density changes with every jar in the pantry. The same cup that holds 240 grams of water holds 120 grams of all-purpose flour, 200 grams of granulated sugar, and 340 grams of honey. There is no single conversion factor. There are fourteen on this page alone, and the ingredient decides which one you need.

That missing word is how bakes go wrong. Grab the water figure and apply it to flour and you have doubled the flour; the recipe never stood a chance. The subtler failure is technique. For ingredients that compress, how you fill the cup moves the number even after you have the right density: a cup of flour scooped straight from the bag packs to roughly 150 grams, while spooned in gently and leveled off it is the 120 recipes intend. That is a quarter more flour hiding inside two identical-looking cups. This guide covers the one formula behind every conversion, the full chart for all fourteen ingredients, worked examples in both directions, and the short list of ingredients where the cup misbehaves worst.

One formula, fourteen densities

Every cups-to-grams conversion ever printed is the same line of arithmetic:

• grams = cups × grams-per-cup
• going the other way: cups = grams ÷ grams-per-cup
• grams-per-cup is the ingredient's density, measured in the 240 ml US cup, spoon-and-level

That is the entire engine. The converter takes your cups, looks up the ingredient's grams-per-cup in a locked density table, multiplies, and rounds the result to whole grams for display. Tap Swap and it runs the same line backward, dividing grams by the density to recover cups. Nothing about the math is hard. Everything that matters lives in that per-ingredient density figure, which is why "1 cup" means 120 grams in a flour recipe and 340 in a honey one.

Because it is a single multiplication, the math is linear and you can do most of it in your head once you know the one-cup figure. Half a cup of flour is 60 grams. Two cups of sugar are 400. A quarter cup of honey is 85. No thresholds, no curve, no exceptions — the only thing that ever changes between ingredients is the density you multiply by.

Quick answer: grams in one cup, every ingredient

Find your ingredient, read across. These are the same fourteen densities the converter runs, pre-multiplied for the fractions on a standard measuring-cup set and rounded to whole grams exactly as the tool displays them.

Read the qualifiers as part of the number. Brown sugar is 213 grams packed — loose, it weighs far less and varies with every fill. Powdered sugar is 113 unsifted; sifting drops a cup to roughly 100. Oats means rolled oats, rice means raw rice, and butter's exact figure is 226.8, which the display rounds to 227. The linked ingredients have dedicated pages with a ¼-to-2-cup quick table and the story behind that ingredient's density; the chart above is the master reference they all share.

Why a cup of cocoa is 85 grams and a cup of honey is 340

The chart's spread is not noise. Cocoa powder to honey is exactly a fourfold difference for the identical 240 ml of space, and the reason is plain physics: a cup fixes the volume, and the ingredient's density decides how much mass fits inside it. Honey pours dense, with no air in it at all. Cocoa powder is mostly air between fine particles. Everything else falls in between, which is why the chart looks like a ladder instead of a single rung.

Density is only half the story, though. The other property that matters is whether the ingredient compresses. Water cannot be packed into a cup any harder; granulated sugar's hard, uniform crystals barely budge. Those ingredients give the same weight no matter how you fill the cup. Flour, brown sugar, and powdered sugar are the opposite: they trap air, so scooping, pressing, or sifting changes how much mass ends up in the same volume. That second axis is the honest answer to why some ingredients are safe to measure by cup and others quietly wreck recipes — and it is why the sections below sort the pantry into well-behaved and misbehaving piles rather than treating all fourteen alike.

One detail worth noticing on the ladder: a cup of vegetable oil is 218 grams, lighter than water's 240. That is not an error. Oil is genuinely less dense than water — the same fact that makes it float on top of a vinaigrette shows up in your measuring cup.

Flour: the ingredient the cup punishes hardest

Flour is the worst offender in the whole chart, and it deserves its own section because it is also the ingredient where the error does the most damage. The intended weight is 120 grams per cup, measured the way recipe developers measure: stir the flour to loosen it, spoon it gently into the cup until it mounds over the rim, then sweep the top flat with a straight edge. Dip the cup into the bag and scoop instead, and you compact the flour to roughly 150 grams. Same cup, same flour, about 25 percent more of it.

Scale that up and the damage gets vivid. A recipe calling for three cups of flour is asking for 360 grams; three scooped cups deliver about 450, and that extra 90 grams is three-quarters of an additional cup of flour that nobody wrote into the recipe. The results all look like mysterious failures rather than measuring errors: cakes turn dense and dry, cookies bake up cakey and pale instead of spreading, bread crumb tightens. Because the over-measurement comes from hand technique, it is invisible and perfectly repeatable — you will make the same "mistake" every single time, and the recipe will fail the same way every single time.

The fix costs nothing: spoon and level, never scoop, never tap the cup to settle it. The better fix is to weigh, because a cup of flour is the single conversion where a scale changes results you can taste. Two footnotes for the flour shelf: bread flour weighs the same 120 grams per cup, and whole-wheat runs slightly denser at 113.

The well-behaved ingredients

Not everything misbehaves. Granulated sugar is the one common dry ingredient that volume measures honestly: its crystals are hard and uniform, so they refuse to compress, and a scooped cup weighs essentially the same 200 grams as a spooned one. This is why a recipe can say "1 cup sugar" with a straight face while "1 cup flour" is a gamble. If you measure only one ingredient by cup for the rest of your life, make it this one.

Butter is reliable for a different reason — the US stick system does the measuring for you. One stick is ½ cup, 8 tablespoons, 4 ounces, and 113 grams, with a tablespoon grid printed on the wrapper; two sticks make the cup at 227 grams, and two cups make exactly a pound at 454. Cutting cold butter at the printed marks is as accurate as weighing, which makes butter one of the few "cup" ingredients you can trust without a scale. The system collapses the moment the butter is not a US stick: European butter comes in unmarked blocks, so a recipe written in sticks means nothing until you weigh — 113 grams per stick, whatever shape the butter arrived in.

The thin liquids behave too. Water is the near-definitional case — 240 milliliters weighs 240 grams — and milk is barely different at 245. Neither compresses, neither cares how you pour. Liquids fail on a different axis: honesty of the reading, since a cup of anything sticky never fully leaves the cup.

The conditional ones: packed, sifted, and sticky

Three ingredients carry a qualifier that is doing real work, and ignoring it moves the number more than any other mistake short of scooping flour.

Brown sugar: 213 grams, packed. The molasses film that coats brown sugar makes the crystals cling, so a loosely spooned cup traps air pockets and can weigh a third less than the packed figure recipes assume. Pack it properly — press it into the cup with the back of a spoon, add more, press again, level it — and the sugar holds the cup's shape when you turn it out, like a sandcastle. That molded dome is the visual proof you measured what the recipe meant.

Powdered sugar: 113 grams, unsifted. Sifting fluffs air into it and drops a cup to roughly 100 grams, a 10-to-15 percent swing that matters in icings, where the sugar-to-liquid ratio sets the consistency. Recipe wording decides the order of operations: "1 cup powdered sugar, sifted" means measure then sift, while "1 cup sifted powdered sugar" means sift first — the comma placement changes the amount you end up with.

Honey: 340 grams, and none of it wants to leave the cup. Honey is the densest thing in the chart, and measuring it by volume means coaxing it in and scraping it out while a stubborn film clings to the sides. Weighing is less miserable, not just more accurate: set the bowl on the scale, tare to zero, and pour until you hit the grams. If you must use the cup, oil it lightly first and the honey slides out clean — or measure the recipe's oil first and reuse the unwashed cup.

Worked example: a cookie recipe, converted line by line

Take a standard drop-cookie ingredient list and run every line through the one formula. The arithmetic in full:

• 2¼ cups all-purpose flour — 2.25 × 120 = 270 g
• ¾ cup granulated sugar — 0.75 × 200 = 150 g
• ¾ cup brown sugar, packed — 0.75 × 213 = 159.75 → 160 g
• 1 cup butter — 1 × 226.8 = 227 g (two sticks, cut at the wrapper marks)
• 1 cup rolled oats — 1 × 90 = 90 g

Two things are worth staring at. First, the brown sugar line is the only one that lands off a whole number, and the display's rounding to 160 costs you a quarter of a gram — irrelevant in any recipe. Second, only the flour line carried real risk. Scoop those 2¼ cups instead of spooning them and the flour arrives at roughly 338 grams instead of 270, a 68-gram overshoot that would push these cookies from chewy to cakey. Every other line was either incompressible (the sugars, measured properly) or pre-portioned (the butter). Converting the recipe to grams and weighing it removes the one failure mode it actually had.

The workflow bonus: with everything in grams you weigh straight into one bowl, pressing tare between additions. No cup gets dirty, and nothing depends on your wrist.

Worked example: grams back to cups

The swap direction earns its keep the first time you cook from a European or bakery-style recipe, which will hand you grams and assume you own a scale. If you do not, divide by the density instead:

• 250 g flour — 250 ÷ 120 = 2.08 → just over 2 cups. Stop at 2 level cups and you are 10 grams short, about a tablespoon and a third of flour.
• 200 g granulated sugar — 200 ÷ 200 = exactly 1 cup. The one clean answer in the batch.
• 150 g butter — 150 ÷ 226.8 = 0.66 → about ⅔ cup, or a stick and a third cut at the wrapper's tablespoon grid.

Notice how awkward two of those three answers are. Gram-based recipes are not written to produce tidy cup fractions, because their authors never intended cups to touch them — the decimals are the argument for the scale, stated politely. And when the same recipe says to bake at 180 °C, that is a separate conversion with its own trap: the oven temperature converter puts 180 °C at 355 °F on the dial, and if yours is a fan oven, about 165 °C is the equivalent setting.

Oats and rice: the two trap ingredients

Two ingredients on the chart fail in ways that have nothing to do with scooping, and both catch people who did everything else right.

Oats fail by type. A cup of rolled oats is 90 grams — steamed, pressed flat, full of air. Steel-cut oats are the same grain left as dense little nuggets, and a cup weighs roughly 180 grams, double. Quick oats pack somewhere between. A recipe's "1 cup oats" almost always means rolled, and swapping steel-cut in by the cup nearly doubles the oats by weight while also demanding different liquid and cook time. The type is the density; get the type wrong and no measuring technique saves you.

Rice fails by state. A cup of dry white rice is 185 grams. Cook it and the grains absorb roughly twice their weight in water: that one dry cup becomes about three cups of cooked rice weighing around 550 grams. So "1 cup rice" means dramatically different things on either side of the pot — cooking recipes almost always mean dry, while nutrition labels and meal-prep portions usually mean cooked. Confuse them and you are off by a factor of three, which is how a side dish for four becomes a side dish for one. If you weigh food for macro targets — the same grams-first logic behind how protein targets are set — the dry-versus-cooked call is the entire measurement.

Three cups, three sizes: US, metric, imperial

One last ambiguity hides in the word "cup" itself. A US customary cup is 240 ml — the standard behind every number in this guide. A metric cup, the one Australian recipes mean, is 250 ml, about 4 percent bigger. An old imperial cup, still lurking in vintage British cookbooks, is 284 ml, about 18 percent bigger. The same "cup of water" is 240, 250, or 284 grams depending on which country wrote the recipe.

The 4 percent metric gap is survivable in most cooking. The 18 percent imperial gap is a scooped-flour-sized error built into the measuring cup itself, before technique even gets a vote. This is the quiet reason gram-based recipes travel across borders and cup-based ones do not: a gram is a gram in every country, while a cup needs a passport check. If a recipe's origin is unclear and the stakes are high, convert everything to grams and the question evaporates.

Weigh it: the case for the scale

Everything in this guide is a workaround for not owning the cheapest upgrade in any kitchen. A basic digital scale costs less than a couple of bags of good flour, and it deletes the entire error catalogue at once: the scoop-versus-spoon spread, the packed-or-loose question, the sifted comma, the sticky cup, the country-of-origin problem. 120 grams is 120 grams however it gets to the bowl. Weighing also makes recipes repeatable — your third batch matches your first — and scalable, because multiplying a gram recipe by 1.5 is arithmetic, while multiplying ¾ cup by 1.5 is a small algebra problem balanced over a sink.

Honesty demands the other side: cups are genuinely fine for plenty of kitchen work. Soups, sautés, dressings, and anything forgiving will never notice a 20 percent flour error because they contain no flour to err on. Granulated sugar measures honestly by volume, stick butter measures itself, and a splash of milk is a splash of milk. The scale earns its counter space where ratios decide outcomes — bread, pastry, cakes, caramel, meringue — which is precisely the territory where the cup is least trustworthy.

Common mistakes to avoid

• Using 240 grams for everything. That is the water figure. Applied to flour it doubles the recipe's flour.
• Scooping flour from the bag. Roughly 150 g per cup instead of the intended 120 — the most common invisible baking error there is.
• Not packing brown sugar. The 213 g figure assumes packed; loose can run a third light and varies every time.
• Ignoring the sifted comma. "1 cup powdered sugar, sifted" and "1 cup sifted powdered sugar" differ by about 13 grams.
• Swapping steel-cut for rolled oats by the cup. Steel-cut weighs about double per cup, and needs different liquid and cook time on top.
• Reading a dry-rice figure against cooked rice. The pot triples the weight. Match the state the recipe means.
• Assuming a British or Australian cup is a US cup. They are 284 and 250 ml against 240 — up to 18 percent bigger.

The honest answer to "how many grams in a cup" is a question back: a cup of what, filled how, in which country's cup? Density picks the number, technique bends it, and the cup standard shifts it again. The chart above settles all three for the fourteen ingredients that cover most of home baking — and the converter runs the same locked table with the arithmetic done for you.