1 Cup Brown Sugar in Grams, Packed
You press brown sugar into a dry cup, turn it out, and the block slumps a little but keeps its shape. That cup weighs 220 grams. Same cup filled by scooping and shaking level: 180 grams.
Forty grams is 18 percent, and it is the whole difference between chewy and cakey. Chocolate chip cookies built on 180 g of brown sugar spread less, brown slower, and lose the crackled top that comes from sugar dissolving at the surface.
The 220 g figure comes from density, not convention. Brown sugar packed sits at about 0.92 g per milliliter, and a US cup is 240 mL, so 240 × 0.92 = 220.8. Round to 220 and you have the number printed in every US baking text and stored in our converters.
What “Packed” Actually Means
Recipes use four different pack levels without saying so, and they are 40 grams apart end to end.
| Pack level | Grams per cup | How it looks | What it does in a bake |
|---|---|---|---|
| Loose scoop | 180 | Falls off the spoon, holes visible | Less sugar, more air, paler crust |
| Lightly packed | 200 | Pressed with fingertips | What “lightly packed” in an older recipe means |
| Firmly packed | 220 | Pressed hard with the back of a spoon, holds the cup shape | The US default when no qualifier is given |
| Pressed until it cracks | 240 | Crumbles out in chunks, cup flexes | Dense, dry crumb, slow spread |
The words on the card decide which row you want. “1 cup brown sugar, packed” is 220 g. “1 cup brown sugar” with no adjective is also 220 g, because American baking assumes packing. “Lightly packed” is 200 g, and it is the one qualifier that changes the answer enough to matter.
If a recipe came from a British or Australian source, the cup itself changes too. A 250 mL metric cup of the same packed sugar weighs 229 g, so a recipe written in metric cups runs about 4 percent heavier than the US version before you even start.
The Packing Test That Settles It
Three checks, in order of how fast they work.
- The turn-out. Invert the cup over the bowl and tap once. Packed sugar drops out as a solid cylinder with sharp edges. If it collapses into a pile, you pressed too lightly.
- The finger test. Press a fingertip into the surface. A properly packed cup resists and barely dents. Loose sugar gives way like sand.
- The scale. This is the only test that answers the question. Tare a bowl, spoon in the sugar, press, level, and dump it in. You want 215 to 225 g.
For a single cup, a scale beats the whole routine. For the third cup in a row, the turn-out test is faster and good enough.
One detail that trips people up: pack the sugar in the cup, not in the bowl. Pressing on a mound in a mixing bowl compacts the bottom layer and leaves the top loose, and you end up with an average that matches neither 180 nor 220.
Every Amount From 1 Tablespoon to 4 Cups
Packed weights at the site’s density, scaled straight from 220 g per cup.
| Volume, packed | Grams | Ounces |
|---|---|---|
| 1 tbsp | 14 | 0.5 |
| 2 tbsp | 28 | 1.0 |
| ¼ cup | 55 | 1.9 |
| ⅓ cup | 73 | 2.6 |
| ½ cup | 110 | 3.9 |
| ⅔ cup | 147 | 5.2 |
| ¾ cup | 165 | 5.8 |
| 1 cup | 220 | 7.8 |
| 1¼ cups | 275 | 9.7 |
| 1½ cups | 330 | 11.6 |
| 2 cups | 440 | 15.5 |
| 3 cups | 660 | 23.3 |
| 4 cups | 880 | 31.0 |
A one-pound box of brown sugar holds 454 g, which is 2 cups packed plus a heaping tablespoon. That is a useful cross-check when a recipe wants “1 pound brown sugar” and you are holding a box: two packed cups and a bit is the whole box, so buy two boxes for anything calling for a pound and a half.
The Kitchen Measurement Converter handles the odd amounts, including ⅛ cup (28 g) and ⅜ cup (83 g), without you doing the division.
Working Backwards: Grams to Cups
Metric recipes hand you a weight, and US measuring cups hand you a volume. Divide by 220.
| Packed weight | Cups | Closest measuring-cup instruction |
|---|---|---|
| 50 g | 0.23 | 3 tbsp plus 1 tsp |
| 100 g | 0.45 | 7 tbsp |
| 150 g | 0.68 | ⅔ cup |
| 200 g | 0.91 | ¾ cup plus 3 tbsp |
| 250 g | 1.14 | 1 cup plus 2 tbsp |
| 300 g | 1.36 | 1⅓ cups |
| 400 g | 1.82 | 1¾ cups plus 1 tbsp |
| 500 g | 2.27 | 2¼ cups plus 1 tsp |
Round to the nearest tablespoon and stay inside the tolerance. Brown sugar is forgiving on a 5 g error and unforgiving on a 40 g one, so a slightly off tablespoon is not the thing to worry about.
Light, Dark, and the Box That Sat Open
Two adjustments sit on top of the 220 g baseline.
Dark brown sugar weighs a little more. It carries roughly 6 percent molasses against 3.5 percent for light, and molasses is denser than the sugar crystal it coats. Expect about 225 g per packed cup for dark, 220 g for light. The difference is one teaspoon of sugar, so treat it as a rounding note rather than a separate chart.
Dry sugar packs heavier. Brown sugar is hygroscopic: it pulls moisture from the air, and when it dries the crystals fuse into lumps. A hardened bag needs more pressure to fill the cup and lands near 235 g, with air pockets where the lumps did not break. Soften it first. A slice of bread or a damp paper towel in a sealed bag overnight gets it back to packing at 220 g, and ten seconds in a microwave works if you are already mid-recipe.
Fresh, soft sugar has the opposite problem. It packs almost too easily, and the natural instinct is to press until it feels solid, which overshoots toward 240. Press until the surface is level and firm, then stop.
Swapping Packed Brown Sugar for Granulated
The standard substitution is exact enough to trust: 1 cup packed brown sugar = 1 cup granulated sugar plus 1 tablespoon molasses. The arithmetic confirms it. Granulated runs 200 g per cup, a tablespoon of molasses weighs 21 g, and 200 + 21 = 221, one gram off the 220 g target.
Stir the molasses through the granulated sugar with a fork until no dark streaks remain. It takes about two minutes and the result behaves like brown sugar in cookies, quick breads, and marinades. In a meringue or a delicate sponge, skip the swap entirely, since the acid in molasses changes how egg whites and baking soda behave.
Going the other way is not a straight swap. Replacing granulated with brown in a cake adds moisture and acid, which means more spread and a softer crumb. Cut back the liquid by about a tablespoon per cup if the batter looks thin.
Why the Number Changes When You Scale
Scaling a recipe that lists brown sugar in cups compounds the error. Double a batch calling for 1½ cups packed and you are weighing out 330 g twice; double it while scooping loosely and you have 360 g where the recipe wanted 660.
Convert to grams first, then scale. Our Recipe Servings Calculator takes the original yield and the new one and rewrites the whole list, which keeps a 15 gram scooping error from turning into a 60 gram error on a quadruple batch.
Sugar mass also changes how the bake behaves in a pan that has not changed size. More packed sugar means more spread at the edges and a wetter center, and a batch scaled up 50 percent poured into the original 8-inch square will dome and burn before the middle sets. Run the numbers through the Baking Pan Converter before you commit, and check the batter depth against the original.
Try Our Free Tools
The Kitchen Measurement Converter converts packed brown sugar between cups, grams, tablespoons, and ounces using the same 220 g density quoted above, and it does the same for granulated, powdered, and every other pantry staple. The Conversion Chart keeps the whole ingredient table on one printable page, and the Recipe Servings Calculator rescales a batch without reintroducing the scooping error. Free, instant, no signup.
One packed cup of brown sugar is 220 g, and the only routine exception is the word “lightly packed,” which means 200 g. Hand a recipe 220 g when it asked for 200 and the cookies come out flatter, darker at the rim, and a little too crisp by day two.