Convert Grams to Cups: Caster Sugar
Convert grams of caster sugar back to cups with this complete reference table. Starting from 210g = 1 cup, use the table below to find cups for any gram amount. This reverse conversion is useful when a recipe specifies grams but you only have measuring cups available. Note: 1 US cup = 240ml = 16 tablespoons.
Caster Sugar Grams to Cups Table
| Grams | Cups |
|---|---|
| 25g | ⅛ cup |
| 50g | ¼ cup |
| 75g | 0.36 cups |
| 100g | 0.48 cups |
| 125g | 0.6 cups |
| 150g | 0.71 cups |
| 200g | 0.95 cups |
| 250g | 1.19 cups |
| 300g | 1.43 cups |
| 400g | 1.9 cups |
| 500g | 2.38 cups |
| 750g | 3.57 cups |
Based on USDA FoodData Central data (1 US cup = 240ml = 16 tablespoons = 48 teaspoons). Note: Caster sugar (superfine sugar) has finer crystals than regular granulated sugar. 1 cup = 210g. Dissolves faster than regular sugar — ideal for meringues, mousses, cold drinks. Common in UK/Australian recipes.
About Caster Sugar Density
The density of caster sugar determines how much it weighs per unit of volume. At 0.875g/ml, 1 US cup (240ml) of caster sugar weighs 210g under USDA standard conditions.
Volume measurements can vary by ±10–20% depending on technique (sifted vs. spooned vs. scooped). For consistent baking results, use a kitchen scale with gram measurements whenever possible. The USDA standard (spooned-and-leveled) is the reference point for all values on this page.
Frequently Asked Questions
How many cups is 100g of caster sugar?
100g of caster sugar equals approximately 0.48 cups (based on 210g per 1 US cup).
How many cups is 200g of caster sugar?
200g of caster sugar equals approximately 0.95 cups.
How many cups is 500g of caster sugar?
500g of caster sugar equals approximately 2.38 cups.
Why convert grams to cups for caster sugar?
When a recipe lists grams but you only have measuring cups, you need to convert back. 210g = 1 cup is your baseline. Use a kitchen scale for the most accurate results.