BeverageGrams to Cups

Tonic water Grams to Cups

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

Snapshot

1 gram of tonic water equals < 0.01 cups. 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: 250 g = 1.05 cups (about 1 cup).
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

< 0.01 Cups

Switch

1 gram

With 1 gram of Tonic water, you get < 0.01 cups, which is too little to measure reliably in a cup.

Machine access

Available to apps and AI agents

Tonic water Grams to Cups 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: gram
Target unit: cup_us
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": "gram",
  "to": "cup_us",
  "material": "tonic-water"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "beverage",
    "value": 1,
    "from": "gram",
    "to": "cup_us",
    "result": {
      "raw": 0.00418490798308025,
      "display": "< 0.01"
    },
    "canonicalPath": "/beverage/grams-to-cups/tonic-water/"
  }
}

Full API documentation

Explanation

Convert grams of tonic water into US cups using the same 238.95 grams-per-cup reference used on the reverse page.

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 Gram = < 0.01 Cups.
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

Grams	Cups
25	0.1 (about 1/8 cup)
50	0.21
75	0.31
100	0.42
150	0.63 (about 5/8 cup)
200	0.84
250	1.05
500	2.09

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 cups is 100 g of Tonic water?

100 g of Tonic water is 0.42 US cups using the density reference for this converter.

What cup reference is used for Tonic water?

It uses the US cup standard (236.588 mL), which is equivalent to 238.95 g per cup for Tonic water.

How many cups is 250 g of Tonic water?

250 g of Tonic water is 1.05 US cups using the density reference for this converter.

How do I convert Tonic water cups back to grams?

Use the mirror Cups To Grams page; for this ingredient, 1 US cup = 238.95 g.