1/2 Cup Brown Sugar in Grams
1/2 cup of brown sugar weighs 106.5 g (packed, King Arthur Baking). White sugar coated in molasses; light and dark differ only in molasses content. All the figures on this page are approximate conversions based on the King Arthur Baking value, so when a recipe really matters, verify with a kitchen scale.
White sugar coated in molasses; light and dark differ only in molasses content. It is used for cookies, barbecue sauces, glazes and oatmeal. That range of uses is part of why the conversion comes up so often: the same ingredient appears in everyday cooking and in precise baking, and the two situations demand different levels of accuracy. Knowing the weight of half a cup, rather than guessing from a measuring cup, keeps the result consistent no matter which recipe you are following.
Why weighing half a cup of brown sugar beats measuring it in cups
Half a cup is the amount most home recipes reach for when they want sweetness without going overboard, which is exactly why it deserves a proper weight. A single cookie batch, a small cake or a pan of glaze will often call for 1/2 cup of brown sugar, and because sugar is hygroscopic it picks up moisture from the air, clumps, and then weighs differently from one week to the next. The 106.5 g figure on this page is the standard for brown sugar measured packed, so it gives you a fixed anchor even when the sugar in your cupboard has gone soft or grainy. Once you know the weight, scaling a recipe up or down becomes simple arithmetic instead of a gamble.
Brown Sugar cups to grams conversion table
| Cups | Grams (approx.) |
|---|---|
| 1/4 cup | 53.5 g |
| 1/3 cup | 71 g |
| 1/2 cup | 106.5 g |
| 2/3 cup | 142 g |
| 3/4 cup | 160 g |
| 1 cup | 213 g |
| 1 1/2 cups | 319.5 g |
| 2 cups | 426 g |
| 3 cups | 639 g |
One tablespoon of brown sugar weighs about 13.5 g, and one teaspoon about 4.5 g. For small amounts a scale that reads to the gram is far more reliable than a spoon, because a heaped tablespoon can weigh half as much again as a level one. The table is rounded to the nearest half gram, so the numbers are approximate by design; the half-cup figure of 106.5 g is the one to use when a recipe calls for half a cup.
How the weight was measured
Packed means pressing the ingredient firmly into the measuring cup with the back of a spoon until it holds its shape when turned out. Loose spooning leaves air pockets and under-measures, so packing is part of the measurement, not a shortcut.
The source for the 213 g per cup figure is King Arthur Baking, and the confidence in the value is high. King Arthur Baking publishes a standard ingredient weight chart that recipe developers use as a reference, and this page follows it exactly rather than averaging across sources, because an average of two different measuring methods is a number that matches nobody's cup.
There is a dispute worth knowing about. Packed firmly, per King Arthur; loosely spooned brown sugar weighs about 170 g per cup, so packing matters more than brand. The practical advice is simple: use the value in the table above, measure the way the table describes, and your results will match the recipes this site is built around. If a recipe you are following was written with a different value, follow that recipe's value instead of ours, because consistency within one recipe matters more than which authoritative number you pick.
All the figures on this page are approximate conversions. When a recipe really matters, verify with a kitchen scale: weigh the ingredient directly into the bowl on a tared scale and trust that number over any cup.
Worked examples
Muffins for the week
A muffin recipe using 1/2 cup of brown sugar needs 106.5 g. Muffins are mixed quickly and baked hot, so there is no time to correct a sugary batter once it is in the tin; weighing first means the tops dome properly and the crumb stays tender rather than dense.
Scaling up a jam or preserve
A preserve recipe that starts with 2 cups of brown sugar needs 426 g. At that scale a cup-measure error compounds badly, and under-sweetened jam may not set, so weighing the full amount on a scale is the only sensible approach for a big batch.
Sweetening a breakfast bowl
Stirring 1/2 cup of brown sugar into a large batch of granola or porridge topping is 106.5 g. Because the sugar is distributed through dry oats, an even weight matters more than it looks: too much and the granola clumps and burns, too little and it never toasts properly.
When this conversion matters most
The weight matters whenever brown sugar is doing structural work rather than just sweetening a drink. In a meringue the sugar stabilises the foam; in a cookie it decides how far the dough spreads; in a jam it decides whether the preserve sets. In a cup of tea, by contrast, a gram or two either way is invisible, so save the scale for the bakes where it counts and spoon freely where it does not.
Common mistakes with brown sugar
- Using a liquid jug for sugar. Jugs are for pouring and you cannot level a dry ingredient in one. Use a dry measuring cup, or a scale set to 106.5 g for 1/2 cup.
- Sifting before measuring. Sifting adds air and lightens sugar, so a cup of sifted sugar weighs less than a cup of unsifted sugar. Measure before sifting unless the recipe says otherwise.
- Rounding down to save time. Rounding 106.5 g to a neat 100 g feels tidy but is a 10% error in a small bake. Keep the real figure; the scale does the work for you.
- Swapping sugars by volume. Different sugars weigh different amounts per cup, so swapping brown sugar for another sugar cup-for-cup changes the recipe. Swap by weight instead.
Storage and handling
Airtight container with a clay disc or bread slice to stop it hardening. Keeping brown sugar stored properly also keeps its weight per cup stable: an ingredient that has absorbed moisture from the air weighs more per cup than a dry one, so good storage is not just about freshness, it is about measurement accuracy too. If a container has been open for months in a humid kitchen, the first thing to do before a precise bake is to weigh the ingredient rather than trusting the cup.
Frequently asked questions
How many grams is 1/2 cup of brown sugar?
1/2 cup of brown sugar weighs 106.5 g, measured packed according to King Arthur Baking. That is the figure to use when converting a recipe from cups to grams, and it is the value the conversion table on this page is built on.
How do I measure brown sugar without a scale?
Packed means pressing the ingredient firmly into the measuring cup with the back of a spoon until it holds its shape when turned out. Loose spooning leaves air pockets and under-measures, so packing is part of the measurement, not a shortcut. That gives the closest result to 106.5 g per half-cup, but it is still an estimate: the honest answer is that a scale is the only way to know the exact weight, and a basic digital kitchen scale costs less than a bag of good flour.
Does 1/2 cup of brown sugar always weigh 106.5 g?
No. Brand, crystal size, moisture and how settled the container is all shift the weight by a few grams. The 106.5 g figure is the standard King Arthur Baking value for brown sugar measured packed, and it is the right default, but when a recipe is precise, weigh the ingredient and trust the scale over the cup.
What is brown sugar used for?
Cookies, barbecue sauces, glazes and oatmeal. White sugar coated in molasses; light and dark differ only in molasses content.
Why do different websites give different weights for brown sugar?
Because they measure different things and round differently. Some sources scoop, some spoon and level, some pack, and some round to the nearest 5 or 10 g. A source that packs will always report a heavier cup than a source that spoons and levels, and both can be correct about their own method. The fix is to pick one source and one method and stick with it for the whole recipe.
How should I store brown sugar?
Airtight container with a clay disc or bread slice to stop it hardening. Good storage keeps the ingredient fresh and keeps its weight per cup consistent, because moisture absorbed from the air adds grams that the recipe did not ask for.
Related conversions
Use the sugar substitute converter or the cups to grams converter for instant answers, or browse the cups to grams hub for the full ingredient list. Related pages: Brown Sugar in cups to grams, 1/2 cup granulated sugar in grams, 1/2 cup powdered sugar in grams, 1/2 cup caster sugar in grams. More tools: cups to grams converter, grams to cups converter, recipe scaler. See also our disclaimer about approximate conversions.