242° Rankine to Celsius

242°R ≈ -138.71°C

Formula: C = (R − 491.67) × 5/9

Rankine to Celsius Converter

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How hot is 242°R?

242°R (-139°C) is colder than any natural place on Earth — an extreme cryogenic temperature near absolute zero.

What does 242°R look like?

Colder than any natural place on Earth — an extreme cryogenic temperature near absolute zero
242°R (-139°C) is colder than any natural place on Earth — an extreme cryogenic temperature near absolute zero.

242°R on the Celsius scale

°R0100.0200.0300.0400.0500.0°C-250.0-200.0-150.0-100.0-500

242.0°R = -138.7°C

How to Convert Rankine to Celsius

The formula is:

C = (R − 491.67) × 5/9

Example: 242° Rankine = -138.71° Celsius

About these units

Rankine: The degree Rankine (°R) is an absolute temperature scale using Fahrenheit-sized increments.

Celsius: The degree Celsius (°C) is the SI-derived unit of temperature. It is defined so that 0 °C = 273.15 K exactly, with the same unit increment as the kelvin.

Frequently Asked Questions

What is 242°R in Celsius?

242°R equals -138.71°C. The formula is: C = (R − 491.67) × 5/9.

What does 242 degrees Rankine look like in degrees Celsius?

242 degrees Rankine equals -138.71 degrees Celsius, a conversion used in various practical applications.

How do you calculate 242°R to Celsius?

Use the formula: C = (R − 491.67) × 5/9. Applying it: 242°R = -138.71°C.

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242 degrees Rankine = -138.706 degrees Celsius
242 degrees Rankine = -138.706 degrees Celsius — conversion chart

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Temperature conversion chart

To Fahrenheit To Celsius To Kelvin
From Fahrenheit (F) F (F - 32) × 5/9 (F - 32) × 5/9 + 273.15
From Celsius (C or o) (C × 9/5) + 32 C C + 273.15
From Kelvin (K) (K - 273.15) × 9/5 + 32 K - 273.15 K

For general conversions between Rankine and Celsius, see the Rankine to Celsius converter.

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.

Conversion factors verified against NIST, BIPM, ITS-90 (International Temperature Scale) Defined by the absolute thermodynamic scale (Kelvin). Last reviewed: March 2026
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