Rankine to Celsius | °R to °C Converter

Rankine to Celsius Converter

Convert between Rankine and Celsius. Useful for engineering and scientific temperature conversions.

Last updated: March 2026 | By Patchworkr Team

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What is Rankine to Celsius conversion?

Rankine to Celsius conversion translates an absolute temperature scale into a relative one. Rankine uses Fahrenheit-sized degrees starting at absolute zero, while Celsius is based on water reference points.

This conversion is useful when working with absolute temperature measurements in systems that need Celsius output.

How to convert Rankine to Celsius

Main formula (°R → °C)

°C = (°R − 491.67) × 5/9

Subtract 491.67, then multiply by 5/9 to convert to Celsius.

Reverse formula (°C → °R)

°R = (°C + 273.15) × 9/5

Add 273.15, then multiply by 9/5 to convert to Rankine.

How to convert 536.67°R to Celsius

Convert 536.67°R to Celsius

(536.67 − 491.67) × 5/9 = 45 × 0.5556 = 25°C
25°C

Common Rankine to Celsius Conversions

RankineCelsius
0 °R-273.15 °C
403.67 °R-50 °C
491.67 °R0 °C
509.67 °R10 °C
527.67 °R20 °C
536.67 °R25 °C
558.27 °R37 °C
581.67 °R50 °C
671.67 °R100 °C
1391.67 °R500 °C

Frequently Asked Questions

How do I convert Rankine to Celsius?

Subtract 491.67, then multiply by 5/9.

What is 0°R in Celsius?

-273.15°C (absolute zero).

Why use Rankine over Celsius?

Rankine is absolute, useful for thermodynamic calculations in US systems.

What is room temperature in Rankine?

Around 527-537°R (20-25°C).

What is 491.67°R in Celsius?

0°C (freezing point of water).

Can Rankine be negative?

No, Rankine starts at absolute zero.

What is body temperature in Rankine?

558.27°R (37°C or 98.6°F).

What is 671.67°R in Celsius?

100°C (boiling point of water).

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