BeverageCups to Grams

Tonic water Cups to Grams

Updated: July 28, 2026 · Source: Beverage density reference (Tonic water density near room temperature.)

Snapshot

1 cup of tonic water equals 238.95 grams. Conversion Encyclopedia keeps one fixed beverage basis on this page so the calculator, common values, and reverse page stay aligned.

Reference basis: 1.01 g/mL.
Example: 2 cups = 477.91 g.
Source basis: Beverage density reference.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Interactive conversion

Converter Calculator

238.95 Grams

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238.95 grams

With 1 cup of Tonic water, that equals 238.95 grams.

Machine access

Available to apps and AI agents

Tonic water Cups to Grams can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The tonic-water identifier tells the conversion engine which ingredient record to use for the same calculation shown by the calculator.

Machine-readable identifiers

Conversion family: beverage
Source unit: cup_us
Target unit: gram
Ingredient: tonic-water

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": "beverage",
  "value": 1,
  "from": "cup_us",
  "to": "gram",
  "material": "tonic-water"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "beverage",
    "value": 1,
    "from": "cup_us",
    "to": "gram",
    "result": {
      "raw": 238.95388,
      "display": "238.95"
    },
    "canonicalPath": "/beverage/cups-to-grams/tonic-water/"
  }
}

Full API documentation

Explanation

Convert US cups of tonic water to grams using a density reference of 1.01 g/mL. With the US cup fixed at 236.588 mL, that gives 238.95 grams per cup for this ingredient.

That is useful for mixer prep, dilution planning, and packaged-drink workflows where tonic water volume and weight need to stay comparable. Tonic water can still vary a little with sugar level or carbonation, so the converter keeps one reference value for consistency.

Method & Density Basis

Density basis: 1.01 g/mL (anchored to US cup 236.588 mL and US fl oz 29.57 mL).
Applied factor: 1 Cup = 238.95 Grams.
Consistency rule: mirror pages invert the same per-liquid constants so forward and reverse directions remain aligned.
Source: Beverage density reference (Tonic water density near room temperature.)

Common Conversion Values

Cups	Grams
1/4	59.74
1/3	79.64
1/2	119.48
3/4	179.22
1	238.95
1 1/2	358.43
2	477.91
3	716.86
4	955.82

Methodology

Tonic water density evidence

Tonic water uses 1.01 g/mL in this dataset, which is 1.0% heavier by volume than the 1 g/mL water reference. Evidence status: medium-confidence. Source basis: Tonic water density near room temperature.

Brand formulation, alcohol or sugar concentration, carbonation, and serving temperature can change the weight of a measured volume. Use this value as a documented reference rather than a producer specification.

Questions & answers

Frequently Asked Questions

How many grams are in 1 cup of Tonic water?

1 US cup of Tonic water is 238.95 grams using the density reference for this converter.

What density basis does this cup conversion use for Tonic water?

It uses a density of 1.01 g/mL with the US cup standard (236.588 mL).

How many grams are in 2 cups of Tonic water?

2 US cups of Tonic water are 477.91 grams using the density reference for this converter.

How do I convert Tonic water grams back to cups?

Use the mirror Grams To Cups page; for this ingredient, 1 g = < 0.01 cups.