Alcohol DilutionUS Proof to Abv per Mille

US Proof to ABV Per Mille for Alcohol Strength

Methodology·How We Verify

Snapshot

1 US Proof equals 5 ABV Per Mille.

Reference basis: This result uses fixed ABV and proof definitions for the selected alcohol-strength pair.
Example: For 0.25 US Proof, the result equals 1.25 ABV Per Mille.

Interactive conversion

Converter Calculator

Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.

5 ABV Per Mille (permille)

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API and AI agent access

US Proof to ABV Per Mille for Alcohol Strength.

Machine-readable identifiers

Conversion family: alcohol-dilution
Source unit: us_proof
Target unit: abv_per_mille

Use these identifiers in the API request. Sources and model limits also apply to software clients.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "alcohol-dilution",
  "value": 1,
  "from": "us_proof",
  "to": "abv_per_mille"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "alcohol-dilution",
    "value": 1,
    "from": "us_proof",
    "to": "abv_per_mille",
    "result": {
      "raw": 5,
      "display": "5"
    },
    "canonicalPath": "/alcohol-dilution/us-proof-to-abv-per-mille/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

The converter converts us proof into abv per mille by normalizing both strength scales through ABV percent. Formula: permille = proof (US) × 5. Both directions stay aligned because the calculator, common values, and mirror page all use the same ABV-based relationship. US proof is defined as 2 times ABV. Per mille here means parts per thousand of ABV by volume.

This is the practical way to compare labeling systems such as ABV, US proof, UK proof, and related fractional strength formats without mixing incompatible proof definitions.

Method & Strength Basis

Method basis: fixed alcohol-strength definitions normalized through ABV percent, including the exact US and UK proof relationships used on this page.
Applied factor: 1 US Proof = 5 ABV Per Mille.
Consistency rule: calculator output and common-value rows use the same ABV-based strength constants in both directions.

Common Conversion Values

US Proof (proof (US))	ABV Per Mille (permille)
1/4	1.25
1/2	2.5
1	5
5	25
12	60
20	100
40	200
57.15	285.75
80	400
100	500

Questions & answers

Frequently Asked Questions

Why does this route go through ABV percent?

ABV percent is the common reference layer for this family, so proof, fraction, and per-mille strength values stay consistent and reversible.

How do I reverse US Proof to ABV Per Mille?

Use the switch button or open the ABV Per Mille to US Proof page to apply the same alcohol-strength relationship in reverse.