CookingCups to Grams

Caster Sugar Cups to Grams

Updated: March 1, 2026

Snapshot

1 cup of caster sugar equals 190 grams. 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: 2 cups = 380 g.
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

190 Grams

Switch

190 grams

With 1 cup of Caster Sugar, that equals 190 grams.

Machine access

Available to apps and AI agents

Caster Sugar Cups to Grams 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: cup_us
Target unit: gram
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/convert

Request

{
  "family": "cooking",
  "value": 1,
  "from": "cup_us",
  "to": "gram",
  "material": "caster-sugar"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "cooking",
    "value": 1,
    "from": "cup_us",
    "to": "gram",
    "result": {
      "raw": 190,
      "display": "190"
    },
    "canonicalPath": "/cooking/cups-to-grams/caster-sugar/"
  }
}

Full API documentation

Explanation

Use 190 g per US cup as the reference when converting caster sugar from cups to grams.

Recipe scaling stays tied to the US cup standard (236.588 mL) rather than to mixed cup charts. Caster Sugar can vary with crystal size, moisture, and caking, so the page keeps one explicit basis instead of mixing packing styles.

Method & Cup Basis

Method basis: cup-to-weight conversion anchored to the US customary cup (≈236.6 mL).
Applied formula: grams = cups × 190.
Consistency rule: snapshot, calculator, FAQ, and table use the same ingredient-specific basis.

Common Conversion Values

Cup	Grams
1/4	48
1/3	63
1/2	95
1	190
1 1/2	285
2	380
3	570

Methodology

Caster Sugar: cups to grams evidence

Direction calculation: Caster Sugar — 1 US cup equals 190 grams. 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

How many grams are in 1 cup of Caster Sugar?

1 level US cup of Caster Sugar weighs 190 grams in this converter.

Does this use a US cup?

Yes. The factor is tied to the US cup definition (236.588 mL), not a metric cup.

Does crystal size or packing change the result for Caster Sugar?

Caster Sugar keeps one reference basis here, but crystal size, moisture, and caking can shift how much fits in a spoon or cup. That matters more with sugars and sweeteners than with a purely liquid measure.

How many grams are in 2 cups of Caster Sugar?

2 cups of Caster Sugar are 380 g using 190 g per cup.

How do I convert Caster Sugar grams back to cups?

Use the mirror Grams To Cups page; divide grams by 190 to return cups.