Historical Temperature ScalesReaumur to Fahrenheit

Réaumur to Fahrenheit

Methodology·How We Verify

Snapshot

1 Réaumur equals 34.25 Fahrenheit.

Reference basis: This conversion uses a scale-and-offset equation (°F = (°Ré * 2.25) + 32).
Example: For 20 Réaumur, the converted value equals 77 Fahrenheit.

Interactive conversion

Converter Calculator

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

34.25 Fahrenheit (°F)

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API and AI agent access

Réaumur to Fahrenheit.

Machine-readable identifiers

Conversion family: historical-temperature-scales
Source unit: reaumur
Target unit: fahrenheit

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": "historical-temperature-scales",
  "value": 1,
  "from": "reaumur",
  "to": "fahrenheit"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "historical-temperature-scales",
    "value": 1,
    "from": "reaumur",
    "to": "fahrenheit",
    "result": {
      "raw": 34.25,
      "display": "34.25"
    },
    "canonicalPath": "/historical-temperature-scales/reaumur-to-fahrenheit/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

Use the exact affine transform: multiply Réaumur by 2.25, then add 32.

Method & Reference

Method basis: exact affine formula (scale + offset) shown in Snapshot.
Equation reference: °F = (°Ré * 2.25) + 32
Consistency rule: forward and reverse pages use inverse equations to preserve scale reference points.

Reference note

This Réaumur to Fahrenheit page uses explicit historical scale equations (scale + offset), not a simple multiplier.

Historical temperature scales are reconstructed from standard reference definitions.
Forward and reverse directions use inverse formulas, so each direction has its own dedicated page.

Common Conversion Values

Réaumur (°Ré)	Fahrenheit (°F)
-40	-58
0	32
20	77
32	104
80	212
100	257

Questions & answers

Frequently Asked Questions

What is 1 Réaumur in Fahrenheit?

1 Réaumur equals 34.25 Fahrenheit on this page.

What equation does this Réaumur to Fahrenheit page use?

This page uses °F = (°Ré x 2.25) + 32, and the same equation drives the direct answer, calculator, table, and FAQ.

Is there a reverse page for Fahrenheit to Réaumur?

Yes. The reverse direction has its own page at °F to °Ré, where the inverse equation is used so the mirror route stays numerically aligned.