Sugars
Caster sugar: US cup to milliliter
1 US cup of Caster sugar = 235 milliliter — based on a density of 0.85 g/ml.
| US cup | milliliter |
|---|---|
| 0.125 | 30 |
| 0.25 | 60 |
| 0.333 | 80 |
| 0.5 | 120 |
| 0.75 | 175 |
| 1 | 235 |
| 1.5 | 355 |
| 2 | 475 |
| 3 | 710 |
| 4 | 945 |
Why the ingredient matters
A cup is a volume, not a weight. Caster sugar has a density of 0.85 g/ml — different ingredients give different weights for the same cup. That's why generic « cup to gram » charts are wrong by 10–30 %.
How precise is this?
The density used here is sourced and cross-checked. Real-world measures still vary by about ±5% depending on how the cup is filled — sifted, scooped or packed.
Data sources
- USDA FoodData Central — Public domain (US government work)
- King Arthur Baking — Ingredient Weight Chart — Reference chart (published factual values)
Frequently asked questions
How many milliliter is 1 US cup of Caster sugar?
1 US cup of Caster sugar equals about 235 milliliter, using a density of 0.85 g/ml.
Is a US cup the same as a metric cup?
No — a US cup is 236.6 ml, a metric cup 250 ml, an imperial cup 284 ml. This page uses the US cup; the converter lets you switch conventions.
Why do different sites give different answers?
Most charts use one generic density for every ingredient. We use the measured density of Caster sugar itself — that is the physically correct conversion.
Should I weigh ingredients instead of using cups?
Yes, whenever possible — a scale removes fill-density error entirely, especially for flour and powders.