Caster Sugar (Superfine Sugar) — Grams to Cups Conversion
Divide by 200. For example, 150g equals ¾ cup.
Caster Sugar (Superfine Sugar) Grams to Cups Chart
| Grams | Cups (approx.) |
|---|---|
| 50g | 0.25 cups |
| 100g | 0.5 cups |
| 150g | 0.75 cups |
| 200g | 1 cups |
| 250g | 1.25 cups |
| 300g | 1.5 cups |
| 400g | 2 cups |
| 500g | 2.5 cups |
Source: King Arthur Baking ingredient weight chart · Measurement method: Spooned & levelled
Tablespoon & Teaspoon Weights
| Measure | Grams | Notes |
|---|---|---|
| 1 tbsp (US/UK — 15ml) | 12.5g | Standard in US, UK, Canada |
| 1 tbsp (Australian — 20ml) | 16.7g | One-third larger than US/UK |
| 1 tsp (5ml — universal) | 4.2g | Same worldwide |
About Caster Sugar (Superfine Sugar)
Granulated sugar milled to a finer crystal size, dissolving almost instantly — the preferred sugar for meringues, delicate sponges, and cold drinks where coarse sugar would feel gritty.
Why the Weight Per Cup Varies
Despite finer crystals, caster sugar packs to the same density as granulated — 200g per cup — because the size difference doesn't meaningfully change how tightly it settles.
Names in Different Countries
"Caster sugar" (UK/AU/NZ) = "superfine" or "baker's sugar" (US/Canada).
Common Recipe Uses
Meringues, pavlova, sponges, macarons, cold drinks.
Substitutions
Make your own by pulsing granulated sugar in a food processor for ~30 seconds until fine (stop before it turns to powder).
Frequently Asked Questions
Same type of sugar, finer crystals — they weigh the same per cup and substitute 1:1.
Superfine or baker's sugar, or pulse granulated sugar in a food processor for ~30 seconds.
Fine crystals dissolve more completely during whisking, reducing the risk of the meringue weeping liquid after baking.
12.5g for a US/UK tablespoon, or 16.7g Australian.
Recommended for accurate baking
A digital kitchen scale accurate to 1g removes all measurement guesswork. Affiliate links will appear here once approved for Amazon Associates.
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