Historical Temperature ScalesRankine to Kelvin

Rankine to Kelvin

Methodology·How We Verify

Snapshot

1 Rankine equals 0.555556 Kelvin.

Reference basis: This conversion uses a scale-and-offset equation (K = °R * (5/9)).
Example: For 20 Rankine, the converted value equals 11.111111 Kelvin.

Interactive conversion

Converter Calculator

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

0.555556 Kelvin (K)

Switch

API and AI agent access

Rankine to Kelvin.

Machine-readable identifiers

Conversion family: historical-temperature-scales
Source unit: rankine
Target unit: kelvin

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": "rankine",
  "to": "kelvin"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "historical-temperature-scales",
    "value": 1,
    "from": "rankine",
    "to": "kelvin",
    "result": {
      "raw": 0.5555555555555556,
      "display": "0.555556"
    },
    "canonicalPath": "/historical-temperature-scales/rankine-to-kelvin/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

Use the exact linear relation between absolute scales: multiply Rankine by 5/9.

Method & Reference

Method basis: exact affine formula (scale + offset) shown in Snapshot.
Equation reference: K = °R * (5/9)
Consistency rule: forward and reverse pages use inverse equations to preserve scale reference points.

Reference note

This Rankine to Kelvin 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

Rankine (°R)	Kelvin (K)
-40	—
0	0
20	11.111111
32	17.777778
80	44.444444
100	55.555556
273.15	151.75
491.67	273.15

Questions & answers

Frequently Asked Questions

What is 1 Rankine in Kelvin?

1 Rankine equals 0.555556 Kelvin on this page.

What equation does this Rankine to Kelvin page use?

This page uses K = °R x (5/9), and the same equation drives the direct answer, calculator, table, and FAQ.

Is there a reverse page for Kelvin to Rankine?

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