How Many Grams Is One Cup Of Sugar? | Stop Guessing Your Bakes

One cup of sugar weighs 198 grams for granulated sugar, with other sugar types ranging from 113 to 220 grams per cup.

If you’ve ever baked the same recipe twice and gotten two different results, your “cup” can be the quiet culprit. Sugar looks simple, but it packs, settles, and clumps in ways that change how much you’re really adding.

Knowing the gram weight for one cup of sugar fixes that fast. You get steadier texture, steadier rise, steadier browning, and fewer “Why is this batch different?” moments.

What “One Cup Of Sugar” Usually Means In Recipes

In most U.S. recipes, “one cup of sugar” means granulated white sugar unless the recipe names another type. When the recipe says “brown sugar,” it often means packed brown sugar. When it says “powdered sugar,” it usually means confectioners’ sugar that may be scooped and leveled.

Those small wording choices change the weight a lot. A cup of powdered sugar can weigh close to half of a cup of packed brown sugar.

How Many Grams Is One Cup Of Sugar? Real-World Weights

Here’s the number most home cooks want first: one cup of granulated white sugar weighs 198 grams. King Arthur Baking’s weight chart lists 198 grams for one cup of granulated white sugar. It also shows that one cup of packed brown sugar weighs 213 grams, and one cup of unsifted confectioners’ sugar weighs 113 grams.

You’ll also see some charts round granulated sugar to 200 grams and brown sugar to 220 grams. Those roundings can work fine for casual cooking. For baking where structure matters, grams win.

Why The Gram Number Changes By Sugar Type

Sugar crystals have different shapes and sizes. Some sugars trap more air between grains. Some compress when packed. Some arrive already fluffy, then settle as they sit in the pantry.

That’s why a cup isn’t a single universal gram number. A cup is a container. Grams measure what’s inside.

Why Your Measuring Method Changes The Weight

Two people can fill the same cup and still get different weights. One might scoop straight from the bag and compress the sugar. Another might spoon sugar into the cup and level it gently.

For brown sugar, the effect is bigger. “Packed” means you press it down until it holds the cup shape when turned out. If you don’t pack it, you’ll use less sugar than the recipe expects.

Quick Conversions You’ll Use All The Time

If you’re converting a recipe to grams, the fastest path is to start with the sugar type and move from there. For granulated sugar, 198 grams per cup is a solid anchor point.

If a recipe is written in tablespoons or teaspoons, you can still convert cleanly by weighing once and writing your own kitchen note for next time.

Fast Kitchen Shortcuts That Still Stay Accurate

• For baking: weigh sugar in grams, then pour straight into the bowl.
• For sauces and drinks: volume measures are fine, but keep your method consistent.
• For brown sugar: pack it the same way every time the recipe calls for “packed.”

Common Sugar Types And Their Gram Weights Per Cup

If you bake with more than one kind of sugar, this is where the “one cup” myth breaks. A cup of granulated sugar does not weigh the same as a cup of powdered sugar or raw sugar.

For a reliable baseline, the weights below come from King Arthur Baking’s ingredient weight chart. It’s a handy reference when you want grams without guesswork.

To keep a trusted conversion page within reach, you can bookmark King Arthur Baking’s ingredient weight chart and pull it up when a recipe gives cups but your scale is out.

Sugar Type (1 Cup)	Grams	What This Means In The Bowl
Granulated White Sugar	198 g	Standard “sugar” in most recipes
Brown Sugar (Packed)	213 g	Heavier because it compresses when packed
Confectioners’ Sugar (Unsifted)	113 g	Light and airy; settles fast in storage
Baker’s Special Sugar (Superfine/Castor)	190 g	Finer crystals; mixes into batters quickly
Demerara Sugar	220 g	Large crystals; adds crunch and deeper sweetness
Turbinado Sugar (Raw)	180 g	Coarse crystals; great as a topping
Sugar Substitute (Splenda)	25 g	Volume-for-volume swaps vary by brand and formula

How To Measure Sugar By Volume With Less Drift

If you don’t have a scale handy, you can still tighten up your results by using one method and sticking with it. The point is repeatability. The same recipe can handle small variation, but big swings can change spread, tenderness, and moisture.

Granulated Sugar

Spoon granulated sugar into the measuring cup, then level it with a straight edge. Don’t tap the cup on the counter. Tapping settles the sugar and sneaks in extra grams without you noticing.

Brown Sugar (Packed)

Fill the cup in layers, pressing down as you go. When you level the top, press again. It should hold the shape of the cup when you tip it out. If the recipe doesn’t say “packed,” don’t pack it.

Powdered Sugar

Powdered sugar compacts and clumps. Break up lumps first. Then spoon it into the cup and level. If the recipe says “sifted,” sift it before measuring so you don’t end up with a heavier cup than the writer intended.

Why Bakers Prefer Grams For Sugar

Grams remove the biggest variable in home baking: how a person fills a cup. That’s why many baking educators encourage using a scale.

Once you weigh sugar, you also get an easy way to scale recipes. Doubling 198 grams is simple. Doubling “one cup plus two tablespoons” is where mistakes creep in.

Where The Weight Difference Shows Up Fast

• Cookies: A heavier cup can make cookies spread more and brown faster.
• Cakes: Too much sugar can weaken structure and leave a tacky crumb.
• Meringues: Superfine sugar dissolves quicker than coarse sugar, changing texture.
• Frosting: Powdered sugar weight shifts thickness, stiffness, and sweetness.

Granulated Sugar Conversion Chart For Common Amounts

If your recipe calls for a fraction of a cup and you want grams, you can scale from 198 grams per cup for granulated sugar. The chart below uses straight math so you can get close fast.

If your recipe is finicky, weigh instead of relying on math and rounding. For most home baking, these values land in a comfortable zone.

Granulated Sugar Volume	Grams (Based On 198 g Per Cup)	Easy Kitchen Note
1/4 cup	50 g	Handy for small-batch cookies
1/3 cup	66 g	Common in muffin batters
1/2 cup	99 g	Round to 100 g if you’re not chasing precision
2/3 cup	132 g	Pairs well with 1 cup flour recipes
3/4 cup	149 g	Often used in quick breads
1 cup	198 g	Standard baseline weight

When You Should Weigh Sugar Instead Of Using Cups

Some recipes are forgiving. Some are not. If your recipe depends on structure and timing, weighing sugar makes the result steadier.

• Use grams for: macarons, meringues, angel food cake, sponge cake, layered cakes, candy, and most bread enrichments.
• Cups are fine for: sweetening oatmeal, coffee, tea, simple fruit bowls, and many simmered sauces.

How To Store Sugar So Your “Cup” Stays Consistent

Storage changes texture, and texture changes how sugar sits in a cup. A dry pantry keeps granulated sugar free-flowing. Brown sugar is the one that causes headaches, since it dries out and hardens.

Granulated Sugar Storage

Keep it in an airtight container. If it clumps, break it up before measuring. Clumps create air gaps and trick your cup measure.

Brown Sugar Storage

Seal it tight. If it’s already hard, soften only what you need for that day’s baking. Once it’s pliable again, you can pack it the way recipes expect.

Sugar Labels, Grams, And Why This Conversion Helps Beyond Baking

Once you think in grams, nutrition labels get easier to interpret too. Added sugars are listed in grams on U.S. Nutrition Facts labels, so a “grams first” habit in the kitchen can make label reading feel more concrete.

If you want a plain-language refresher on how added sugars are shown, the FDA’s page on Added Sugars on the Nutrition Facts Label walks through what the grams line means and why it appears there.

Quick Tips For Getting The Same Result Every Time

You don’t need fancy gear to bake consistently. You need steady habits.

• Pick one measuring style: spoon-and-level for granulated and powdered sugar, pack brown sugar only when the recipe says so.
• Use the same cup set: mixing brands can change the real volume.
• Write your own notes: if you bake a recipe often, jot the gram weights you liked.
• When in doubt, weigh: a small kitchen scale costs less than a ruined cake.

Takeaway: The Cup-To-Grams Number You Can Trust

If you want one clean answer to carry into your kitchen, use 198 grams for one cup of granulated white sugar. That’s a solid, cited baseline from a respected baking source.

Then treat every other sugar as its own ingredient with its own weight. Once you start baking that way, your results get steadier, and your recipes get easier to scale and repeat.