---
title: "Degrees Rankine to Degrees Celsius — °R to °C converter"
description: "1 degree Rankine = -272.5944 degrees Celsius. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/rankine-to-celsius/
site: "At One Place"
---

# Degrees Rankine to degrees Celsius

**1 degree Rankine in degrees Celsius: 1 °R = -272.5944 °C**

°C = °R × 5/9 − 273.15

To convert degrees Rankine to degrees Celsius, use °C = °R × 5/9 − 273.15. The table below gives the values people look up most often, and the converter works for any number.

## Degrees Rankine to degrees Celsius table

*Common degree Rankine values converted to degrees Celsius.*

| Degrees Rankine | Degrees Celsius |
| --- | --- |
| -40 °R | -295.3722 |
| -20 °R | -284.2611 |
| -10 °R | -278.7056 |
| 0 °R | -273.15 |
| 10 °R | -267.5944 |
| 20 °R | -262.0389 |
| 25 °R | -259.2611 |
| 30 °R | -256.4833 |
| 37 °R | -252.5944 |
| 50 °R | -245.3722 |
| 75 °R | -231.4833 |
| 100 °R | -217.5944 |
| 150 °R | -189.8167 |
| 200 °R | -162.0389 |

## How the conversion works

The relationship is °C = °R × 5/9 − 273.15. 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 degrees Celsius are in one degree Rankine?

One degree Rankine equals -272.5944 degrees Celsius. °C = °R × 5/9 − 273.15.

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

Use °C = °R × 5/9 − 273.15. So 10 °R is -267.5944 °C.

### How many degrees Rankine are in one degree Celsius?

One degree Celsius equals 493.47 degrees Rankine, which is the reverse of the conversion above.

## Related pages

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