---
title: "Degrees Rankine to Kelvin — °R to K converter"
description: "1 degree Rankine = 0.55556 kelvin. Convert degrees Rankine to kelvin with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/rankine-to-kelvin/
site: "At One Place"
---

# Degrees Rankine to kelvin

**1 degree Rankine in kelvin: 1 °R = 0.55556 K**

K = °R × 5/9

To convert degrees Rankine to kelvin, multiply by 0.5555555556. The table below gives the values people look up most often, and the converter works for any number.

## Degrees Rankine to kelvin table

*Common degree Rankine values converted to kelvin.*

| Degrees Rankine | Kelvin |
| --- | --- |
| -40 °R | -22.22222 |
| -20 °R | -11.11111 |
| -10 °R | -5.555556 |
| 0 °R | 0 |
| 10 °R | 5.555556 |
| 20 °R | 11.11111 |
| 25 °R | 13.88889 |
| 30 °R | 16.66667 |
| 37 °R | 20.55556 |
| 50 °R | 27.77778 |
| 75 °R | 41.66667 |
| 100 °R | 55.55556 |
| 150 °R | 83.33333 |
| 200 °R | 111.1111 |

## How the conversion works

The relationship is K = °R × 5/9. Both units measure temperature, so the conversion is a fixed formula that never changes. Temperature scales are the one common case where converting is not just multiplication — Celsius and Fahrenheit each put their zero in a different place, so an offset is applied as well as a scale factor.

## Common questions

### How many kelvin are in one degree Rankine?

One degree Rankine equals 0.55556 kelvin. K = °R × 5/9.

### How do you convert degrees Rankine to kelvin?

Use K = °R × 5/9. So 10 °R is 5.555556 K.

### How many degrees Rankine are in one kelvin?

One kelvin equals 1.8 degrees Rankine, which is the reverse of the conversion above.

## Related pages

- [Kelvin to Degrees Rankine](https://atoneplace.net/convert/kelvin-to-rankine/)
- [Degrees Rankine to Degrees Celsius](https://atoneplace.net/convert/rankine-to-celsius/)
- [Degrees Rankine to Degrees Fahrenheit](https://atoneplace.net/convert/rankine-to-fahrenheit/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)