Grams of Caster Sugar to Cups
Grams of caster sugar to cups is a useful conversion because caster sugar is defined as much by crystal size as by sweetness. This page uses 200 grams per US cup for caster sugar, giving you a consistent reference for recipes that want the faster-dissolving behavior of superfine crystals.
Caster sugar is especially popular in meringues, sponge cakes, and desserts where undissolved sugar crystals would be noticeable. Even when the cup weight looks similar to granulated sugar, the mixing behavior is not identical, which is why the correct sugar type still matters.
Caster Sugar Grams to Cups Calculator
Use the converter below for exact amounts beyond the table. It keeps the ingredient set to Caster Sugar so you can quickly check custom gram values for recipe scaling, shopping, and kitchen prep.
Caster Sugar Conversion Table
The table below converts common gram amounts into cups and tablespoons using the ingredient-specific density value of 200 grams per US cup. The fourth column highlights an extra measurement that matters for caster sugar in real recipes.
| Grams | Cups | Tablespoons | Teaspoons |
|---|---|---|---|
| 25g | 0.13 cups | 2 tbsp | 6 tsp |
| 50g | 0.25 cups | 4 tbsp | 12 tsp |
| 75g | 0.38 cups | 6 tbsp | 18 tsp |
| 100g | 0.5 cups | 8 tbsp | 24 tsp |
| 150g | 0.75 cups | 12 tbsp | 36 tsp |
| 175g | 0.88 cups | 14 tbsp | 42 tsp |
| 200g= 1 cup | 1 cups | 16 tbsp | 48 tsp |
| 225g | 1.13 cups | 18 tbsp | 54 tsp |
| 250g | 1.25 cups | 20 tbsp | 60 tsp |
| 300g | 1.5 cups | 24 tbsp | 72 tsp |
| 350g | 1.75 cups | 28 tbsp | 84 tsp |
| 400g | 2 cups | 32 tbsp | 96 tsp |
| 500g | 2.5 cups | 40 tbsp | 120 tsp |
| 750g | 3.75 cups | 60 tbsp | 180 tsp |
| 1,000g | 5 cups | 80 tbsp | 240 tsp |
Caster sugar is measured loose and leveled, not packed. Even though its density here is close to granulated sugar, the finer crystal size changes how fast it dissolves. Need the reverse direction? Use the cups to grams converter or compare broader kitchen references in the printable conversion charts.
Caster Sugar Compared With Other Sugar Types
Sugar type is not only about cup weight. Crystal size changes how quickly the sugar dissolves, how a foam stabilizes, and how fine the final crumb feels in delicate desserts.
| Ingredient | Grams per cup | Crystal or moisture profile | Best for |
|---|---|---|---|
| Caster SugarThis page | 200g | Fine fast-dissolving crystals | Meringues, sponge cakes, cocktails |
| Granulated Sugar | 200g | Medium crystals | Cookies, cakes, syrups |
| Powdered Sugar | 120g | Very light powdered sugar | Icings, glazes, buttercream |
| Light Brown Sugar (packed) | 215g | Moist with light molasses | Chewy cookies, quick breads |
| Turbinado Sugar | 190g | Large crunchy crystals | Toppings and finishing |
| Demerara Sugar | 200g | Large amber crystals | Crunchy finishes and syrupy desserts |
Caster sugar may weigh close to granulated sugar by cup, but it dissolves faster. That can improve meringues and fine sponge batters even when the gram amount stays the same.
How to Measure Caster Sugar Accurately
Caster sugar is easier to measure than flour, but it still deserves ingredient-specific handling because its fine crystals can clump with humidity and are often confused with powdered sugar.
Confirm that the sugar is caster sugar and not powdered sugar
Caster sugar looks finer than granulated sugar, but it is still a crystal sugar. Powdered sugar contains much finer particles and often starch, so accurate measuring starts with checking the label.
Loosen any caster sugar clumps before filling the cup
Fine sugar can compact in humid storage. Stir the caster sugar lightly so the measuring cup fills evenly and stays close to the 200-grams-per-cup reference.
Pour and level the caster sugar without packing it
Caster sugar should be measured loose, not pressed down. Packing is unnecessary and can make the final weight heavier than the standard used in the converter.
Weigh caster sugar for meringues and syrups
When a recipe depends on sugar dissolving fully or stabilizing a foam, weighing caster sugar gives more repeatable results than relying on cup volume alone.
What changes the measured result
Loose leveled caster sugar
This matches the conversion table and works well for pavlova, sponge cake, curd, and other fine-texture desserts.
Humid or clumped caster sugar
Fine crystals hold together more easily than standard granulated sugar, so a clumped cup can become denser than expected.
Granulated sugar substitute
Granulated sugar can sometimes replace caster sugar by weight, but the crystals dissolve more slowly and can change texture in delicate recipes.
Why Caster Sugar Measurement Matters
Caster sugar is chosen for texture and speed of dissolving, not just for sweetness. In meringue and pavlova, it dissolves into whipped egg whites more readily than larger crystals. In sponge cakes and curds, it blends smoothly and helps avoid a coarse mouthfeel.
Too much caster sugar can make foams slow to set, cakes overly soft at the edges, and syrups sweeter than intended. Too little can reduce tenderness and leave meringues less stable. Accurate gram-based measuring keeps the recipe balance clear while preserving the benefit of the finer crystal size.
Meringues can weep or stay sticky
If the caster sugar ratio is too high, whipped egg-white foams may take longer to dry and can stay tacky after baking.
Sponge cakes can lose structure at the edges
Excess caster sugar softens the batter and can make delicate cakes collapse slightly or bake with a weak crumb at the rim.
Curds and custards can taste unbalanced
A small sugar measuring error changes how lemon curd or custard balances acidity, texture, and final set.
Cocktail syrups and desserts depend on fast dissolving sugar
Caster sugar is often chosen to dissolve quickly. The wrong amount or wrong sugar type can leave graininess or oversweet syrup.
Why caster sugar is worth measuring by grams
Caster sugar is all about precision in delicate mixing. Weight keeps sweetness consistent, while the fine crystal size does the dissolving work the recipe expects.
Caster Sugar in Common Recipes
These recipes use caster sugar as a major sweetener or structural sugar rather than a garnish or topping.
Meringue shells
one tray
A one-cup benchmark where fine crystals help the foam stay smooth.
Pavlova
8 servings
Caster sugar is central to the crisp shell and marshmallow center.
Victoria sponge
8 slices
A classic cake where superfine sugar creams smoothly with butter.
Lemon curd
about 2 cups
Sugar level controls both tartness and texture.
Madeleines
12 cakes
Fine sugar supports a delicate crumb.
Genoise sponge
one 8-inch cake
Caster sugar blends easily into an egg foam.
Macaron batter
one tray
Commonly used alongside almond flour for smoother shells.
Berry coulis syrup
one sauce batch
Fine sugar dissolves quickly with fruit and heat.
If you replace caster sugar with granulated sugar, convert by grams first and then think about dissolving time. Weight may match, but mixing behavior may not.
Caster Sugar Grams to Cups FAQ
These questions cover the most common search intents around caster sugar, including the top gram amounts, measurement technique, substitutions, regional cup differences, and misconceptions.
How many cups is 100g of Caster Sugar?
100 grams of Caster Sugar is about 0.5 cups, which is also roughly 8 tablespoons. That amount is common in smaller meringue, curd, and macaron formulas where dissolving speed and sugar ratio both matter. This page uses the site density value of 200 grams per US cup, so the answer lines up with the converter and the table above.
How many cups is 200g of Caster Sugar?
200 grams of Caster Sugar is about 1 cups, which is also roughly 16 tablespoons. This is the one-cup benchmark on this page and a frequent amount for pavlova, sponge cake, and syrup recipes. This page uses the site density value of 200 grams per US cup, so the answer lines up with the converter and the table above.
How many grams are in 1 cup of Caster Sugar?
One US cup of Caster Sugar is 200 grams based on the reference value used throughout this site. That number matters because grams measure weight and cups measure volume. Once the grams-per-cup value is correct, every conversion for 50g, 100g, 200g, and larger recipe amounts becomes much more reliable.
What is the most common caster sugar measuring mistake?
The most common mistake is confusing caster sugar with powdered sugar or assuming it behaves exactly like granulated sugar because the cup weight is similar. Caster sugar is still a crystal sugar, just finer. Using the wrong product changes dissolving speed and texture, especially in meringues, sponge cakes, and silky fillings where graininess matters.
Can I substitute granulated sugar for caster sugar using the same cups?
Sometimes, but it is not a perfect swap. Granulated sugar may match closely by weight, yet the larger crystals dissolve more slowly and can change the texture of meringues, pavlova, or delicate sponge batters. If you substitute, convert the original caster sugar amount to grams first, then decide whether the recipe can tolerate the difference in crystal size and dissolving speed.
Does measuring method change caster sugar cup weight much?
Not as dramatically as with flour, but it still matters. A loose leveled cup of caster sugar stays close to the 200-grams-per-cup reference used here. If the sugar is humid, clumped, or lightly compressed in the cup, the measured weight can rise enough to affect meringue texture, sponge tenderness, or syrup sweetness.
Is caster sugar the same as superfine sugar in the US?
Usually yes in practical baking terms. UK and Australian recipes commonly say caster sugar, while US recipes may call it superfine sugar. This page uses a US cup standard, so the volume reference is still American, but the bigger issue is making sure you have a fine crystal sugar rather than powdered sugar or standard large-crystal coarse sugar.
Is caster sugar just powdered sugar with a nicer name?
No. Powdered sugar is ground much finer and usually contains a little starch to prevent clumping. Caster sugar is still made of small crystals, which is why it can be creamed into butter or dissolved into egg whites without acting like confectioners' sugar. The two sugars serve very different purposes in baking.
Related Ingredients
These pages are the closest matches or substitutes you are likely to compare against caster sugar when translating recipes, making substitutions, or checking density differences.
🍬 Granulated Sugar
Standard white sugar crystals used for baking.
🍥 Powdered Sugar
Fine sugar for frosting, glaze, icing, and decorative dusting.
🟤 Brown Sugar (packed)
Brown sugar measured packed in the cup.
🟤 Turbinado Sugar
Coarser raw sugar crystals.
🟤 Demerara Sugar
Large-crystal brown sugar (approx.).
🥥 Coconut Sugar
Granulated coconut sugar (approx.).
More Tools
Cups to grams converter
Reverse the calculation when your caster sugar recipe starts with cups instead of grams.
Printable charts
Browse quick-reference charts for flour, sugar, baking, and pantry staples.
Recipe scaler
Scale caster sugar formulas up or down using weight-based math instead of eyeballing cup amounts.
How to convert grams to cups
See how ingredient-specific density and sugar style affect cup conversions in real baking formulas.
Using a different sugar style?
Compare caster sugar with granulated, powdered, brown, and raw sugars before substituting by cups.