Caster Sugar Grams to Cups
Snapshot
100 grams of caster sugar equals 0.53 cups. Conversion Encyclopedia keeps one fixed ingredient basis on this page so the calculator, common values, and reverse page stay aligned.
- Reference basis: 190 g per 1 US cup.
- Example: For 190 g of caster sugar, the result is about 1 cup with the same basis.
- Use the reverse page if you need the opposite direction with the same basis.
Use the interactive calculator below for custom values and the common-value table for quick checks.
Interactive conversion
Converter Calculator
Machine access
Available to apps and AI agents
Caster Sugar Grams to Cups can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The caster-sugar identifier tells the conversion engine which ingredient record to use for the same calculation shown by the calculator.
Machine-readable identifiers
- Conversion family
cooking- Source unit
gram- Target unit
cup_us- Ingredient
caster-sugar
The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.
Example API request and response
POST /api/v1/convertRequest
{
"family": "cooking",
"value": 100,
"from": "gram",
"to": "cup_us",
"material": "caster-sugar"
}Essential response
{
"ok": true,
"conversion": {
"family": "cooking",
"value": 100,
"from": "gram",
"to": "cup_us",
"result": {
"raw": 0.5263157894736842,
"display": "0.53"
},
"canonicalPath": "/cooking/grams-to-cups/caster-sugar/"
}
}Explanation
The converter converts caster sugar from grams into cups. In this converter, 100 grams of caster sugar is about 0.53 US cup, 150 grams is about 0.79 cup, and 190 grams is about 1 cup.
Caster sugar is finer than granulated sugar, so this page keeps one caster-sugar-specific cup basis.
Caster Sugar uses a reviewed reference of 190 grams per US cup in this dataset. Evidence status: high-confidence. Source basis: King Arthur Ingredient Weight Chart (Baker's Special Sugar / castor sugar: 1 cup = 190g)
Crystal size, packing, moisture, and syrup concentration can change how much mass occupies the same kitchen volume.
Common Conversion Values
| Grams | Cups |
|---|---|
| 25 | 0.13 (about 1/8 cup) |
| 50 | 0.26 |
| 100 | 0.53 |
| 150 | 0.79 |
| 190 | 1.00 (about 1 cup) |
| 200 | 1.05 |
| 250 | 1.32 |
Methodology
Caster Sugar: grams to cups evidence
Direction calculation: Caster Sugar — 1 gram equals 0.005263157895 US cups. Reference: 190 g/US cup. Source basis: King Arthur Ingredient Weight Chart (Baker's Special Sugar / castor sugar: 1 cup = 190g)
Among the 17 reviewed records labeled Sugars & Sweeteners, the nearest factor to Caster Sugar is Erythritol at 190 g/cup: a difference of 0 g/cup (0.0% relative to Caster Sugar). The observed range in this labeled group is Stevia at 96 g/cup to Honey at 340 g/cup.
Crystal size, packing, moisture, and syrup concentration can change how much mass occupies the same kitchen volume.
Questions & answers
Frequently Asked Questions
What can change a Caster Sugar measurement?
Crystal size, packing, moisture, and syrup concentration can change how much mass occupies the same kitchen volume. The converter preserves one documented reference so repeated calculations remain comparable.
How many cups is 100 g of caster sugar?
100 grams of caster sugar is about 0.53 US cup in this converter.
How many grams are in 1 cup of caster sugar here?
This converter uses about 190 grams for 1 US cup of caster sugar.