How Much Does a Cup of Sugar Weigh?
Understanding how much a cup of sugar weighs helps you bake more consistently and convert recipes with confidence.
The answer depends on the type of sugar, the measuring method, and whether the sugar is packed or spooned.
Standard Weight for a Cup of Sugar
For most home baking, one cup of granulated white sugar weighs about 200 grams, which is roughly 7 ounces.
This is the most widely used benchmark in U.S. recipes, cookbook conversion charts, and food science references.
That standard matters because volume measurements can vary more than many cooks expect.
A lightly scooped cup, a tightly packed cup, and a sifted cup can all produce different weights, especially with finer or coarser crystals.
Quick reference for common sugar types
- Granulated sugar: about 200 g per cup
- Brown sugar, packed: about 220 g per cup
- Powdered sugar: about 120 g per cup
- Superfine sugar: about 190 g per cup
Why Sugar Weight Matters in Baking
Baking is a ratio-driven process.
Sugar does more than sweeten; it affects texture, browning, moisture retention, spread, and tenderness in cakes, cookies, quick breads, and custards.
Using the wrong amount can change the final result.
Too much sugar may cause excessive spread in cookies or a sticky crumb in cakes, while too little can make baked goods dry, pale, or less tender.
Weighing ingredients is especially useful for recipes that depend on precision, such as macarons, meringues, sponge cakes, and enriched doughs.
Professional bakeries, pastry kitchens, and many modern recipe developers rely on grams for this reason.
How Much Does a Cup of Sugar Weigh by Type?
Granulated white sugar
Granulated sugar is the easiest type to standardize.
One cup typically weighs 200 grams, though some charts list 198 to 205 grams depending on density and measuring style.
If you are asking how much does a cup of sugar weigh in everyday baking, this is usually the number people mean.
Packed brown sugar
Brown sugar contains molasses, which adds moisture and makes it denser than granulated sugar.
One packed cup typically weighs about 220 grams.
It should be pressed firmly into the cup measure so it holds its shape when turned out.
Because brown sugar is meant to be packed, a loose cup can under-measure significantly.
That difference can affect chewiness, moisture, and sweetness in recipes such as oatmeal cookies, spice cakes, and barbecue sauces.
Powdered sugar
Powdered sugar, also called confectioners’ sugar or icing sugar, is much lighter because it is finely milled and usually contains a small amount of cornstarch.
One cup generally weighs about 120 grams, though sifted powdered sugar can be even lighter.
This matters in frosting, glazes, and whipped fillings, where a small weight change can alter thickness and structure.
Superfine or caster sugar
Superfine sugar has smaller crystals than regular granulated sugar and weighs slightly less per cup, often around 190 grams.
It dissolves faster, which makes it useful for delicate cakes, cocktails, and whipped egg whites.
How Measuring Method Changes the Weight
Volume measurements are influenced by how the sugar is handled before it reaches the cup.
Two cups filled from the same bag can weigh differently if one is spooned lightly and the other is shaken down.
- Scooping directly from the bag often compacts sugar and increases weight.
- Spoon-and-level measuring tends to be more consistent for dry ingredients.
- Packing is required for brown sugar but not for white sugar.
- Sifting can reduce the weight per cup for powdered sugar.
If consistency matters, use a digital kitchen scale.
Scales remove the guesswork and are especially helpful when doubling recipes or converting between U.S. cups and metric units.
Cup-to-Gram and Cup-to-Ounce Conversion Table
For practical kitchen use, these are the most common conversions for sugar:
- 1 cup granulated sugar = about 200 g = about 7 oz
- 1 cup packed brown sugar = about 220 g = about 7.75 oz
- 1 cup powdered sugar = about 120 g = about 4.25 oz
- 1 cup superfine sugar = about 190 g = about 6.7 oz
These numbers are useful when reading international recipes or adapting formulas that list ingredients by weight instead of volume.
How Much Does Half a Cup or a Tablespoon of Sugar Weigh?
Smaller measurements are easier to scale once you know the cup weight.
For granulated sugar, half a cup weighs about 100 grams.
A tablespoon weighs about 12.5 grams, and a teaspoon weighs about 4 grams.
For brown sugar, half a cup packed weighs about 110 grams.
Powdered sugar is lighter, so half a cup is usually about 60 grams.
These estimates help when you need to adjust sweetness without opening a full conversion chart every time.
Does Sugar Weight Change by Brand or Humidity?
Yes, slightly.
Sugar is hygroscopic, meaning it absorbs moisture from the air.
In humid environments, sugar can clump and feel heavier, especially brown sugar and powdered sugar.
Brand differences also matter because crystal size, milling, and moisture levels can vary.
While the differences are usually small, they can become noticeable in large batches or highly technical baking.
Best Practices for Accurate Sugar Measurement
- Use a digital scale for the best accuracy.
- Choose the correct sugar type before measuring.
- Do not pack granulated sugar unless the recipe says so.
- Pack brown sugar firmly into the cup measure.
- Sift powdered sugar if the recipe specifies sifted sugar.
- Level off dry measuring cups with a straight edge.
When a recipe lists sugar by weight, follow the weight rather than the cup measurement.
This is especially important in professionally developed recipes, where the final texture depends on precise ingredient ratios.
When Should You Trust Weight Over Volume?
Weight is more reliable whenever the recipe is sensitive to precision.
This includes pastry doughs, custards, meringues, syrups, and yeast doughs where sugar impacts fermentation and hydration.
Volume can still work for casual cooking, simple cookies, or family recipes that were written with cup measures in mind.
But if you want repeatable results, especially across different kitchens or countries, weighing sugar is the better method.
Common Sugar Questions in Recipe Conversion
Can I use the same cup weight for all sugars?
No.
Granulated, brown, and powdered sugar all have different densities, so they do not weigh the same in a cup.
What if my recipe is from the UK or Australia?
Recipe conventions vary by region.
Many modern metric recipes list grams, which makes conversion easier.
Always check whether the recipe uses cups, grams, or milliliters before measuring.
Why do some charts show 198 grams instead of 200 grams?
Small differences come from testing methods, crystal size, and how the cup is filled.
For most home baking, 200 grams per cup of granulated sugar is a dependable standard.
Knowing how much does a cup of sugar weigh gives you a practical edge in the kitchen, especially when converting recipes or aiming for consistent results.
With a scale and the right conversion values, you can measure sugar more accurately and bake with less trial and error.