What is 0 Rankine in Celsius?

0 Rankine is equal to -273.15 Celsius.

How do I convert Celsius back to Rankine?

Use the reverse formula. For example, 100 Celsius = 671.67 Rankine.

Rankine to Celsius Converter

Q: How do I convert Rankine to Celsius?

Use the formula to convert. For example, 10 Rankine = -267.59 Celsius. Temperature conversion requires a formula because the scales have different zero points and degree sizes.

Q: What is 100 Rankine in Celsius?

100 Rankine is equal to -217.59 Celsius.

Enter the value that you want to convert Rankine (°R) to Celsius (°C) or Celsius to Rankine.Also written as °R to °C conversion.

1 Rankine = -272.5944444 Celsius

Formula: °C = (°R × 5/9) − 273.15

°R to °C — Rankine to Celsius

Value

°R

Result

-267.59444°C

10 Rankine = -267.59444 Celsius

Popular Temperature Converters:

celsius to fahrenheit fahrenheit to celsius fahrenheit to kelvin kelvin to fahrenheit kelvin to celsius celsius to kelvin

Temperature Scale Comparison Chart

Fahrenheit

Rankine

Kelvin

Celsius

Boiling Point of Water

212 °F

671.67 °R

373.15 K

100 °C

Freezing Point of Water

32 °F

491.67 °R

273.15 K

0 °C

Absolute Zero

-459.67 °F

0 °R

0 K

-273.15 °C

Rankine to Celsius conversion chart — Fahrenheit, Rankine, Kelvin, and Celsius temperature scales compared at key reference points

Rankine to Celsius: The Essentials

The Rankine Explained

The Rankine scale is the Fahrenheit-based absolute temperature scale, starting at absolute zero (0°R = −459.67°F).

Developed by Scottish engineer William Rankine in 1859, the Rankine scale (°R) is used primarily in American engineering for thermodynamic calculations. It relates to Fahrenheit as Kelvin relates to Celsius — same degree size but offset to absolute zero. The Rankine cycle (steam power plant efficiency) and some US aerospace engineering calculations use this scale. To convert: °R = °F + 459.67.

Understanding the Celsius

The Celsius scale was proposed by Swedish astronomer Anders Celsius in 1742, originally with 0° as the boiling point and 100° as freezing — later inverted.

Celsius (°C) is the most widely used temperature scale globally, adopted by every country except the United States for everyday use. It sets water's freezing point at 0°C and boiling point at 100°C at standard atmospheric pressure. The scale is used in weather forecasts, cooking, medicine (normal body temperature ≈ 37°C), scientific research, and industrial processes worldwide. Since 1954, it has been defined relative to the Kelvin scale: °C = K − 273.15.

Temperature Scales in Context

Temperature conversion is one of the few non-linear unit conversions people encounter daily. Celsius dominates scientific work and most countries, Fahrenheit remains standard in the US for weather and cooking, Kelvin is required in thermodynamics and gas law calculations, and Rankine appears in some US engineering applications. Converting between these scales requires formulas rather than simple multiplication.

Rankine to Celsius metric conversion table

0.01 °R	=	-273.14444 °C
0.1 °R	=	-273.09444 °C
1 °R	=	-272.59444 °C
2 °R	=	-272.03889 °C
3 °R	=	-271.48333 °C
4 °R	=	-270.92778 °C
5 °R	=	-270.37222 °C
6 °R	=	-269.81667 °C
7 °R	=	-269.26111 °C
8 °R	=	-268.70556 °C
9 °R	=	-268.15000 °C
10 °R	=	-267.59444 °C
11 °R	=	-267.03889 °C
12 °R	=	-266.48333 °C
13 °R	=	-265.92778 °C
14 °R	=	-265.37222 °C
15 °R	=	-264.81667 °C
16 °R	=	-264.26111 °C
17 °R	=	-263.70556 °C
18 °R	=	-263.15000 °C

19 °R	=	-262.59444 °C
20 °R	=	-262.03889 °C
30 °R	=	-256.48333 °C
40 °R	=	-250.92778 °C
50 °R	=	-245.37222 °C
60 °R	=	-239.81667 °C
70 °R	=	-234.26111 °C
80 °R	=	-228.70556 °C
90 °R	=	-223.15000 °C
100 °R	=	-217.59444 °C
200 °R	=	-162.03889 °C
300 °R	=	-106.48333 °C
400 °R	=	-50.92778 °C
500 °R	=	4.62778 °C
600 °R	=	60.18333 °C
700 °R	=	115.73889 °C
800 °R	=	171.29444 °C
900 °R	=	226.85000 °C
1000 °R	=	282.40556 °C

How to Convert °R to °C (Rankine to Celsius)?

We can convert Rankine to Celsius by using an example.

Example:

Convert 20 Rankine to Celsius?

We know 1 Rankine = -272.5944444 Celsius; 1 Celsius = 493.4700000 Rankine.

20 Rankine = ___°C

20 × -272.5944444 = -262.03889 °C (we know 1 Rankine = -272.5944444 Celsius)

Answer:

20 Rankine = -262.03889 Celsius

How to Convert Rankine to Celsius

Rankine to Celsius requires scaling down and offsetting: °C = (°R - 491.67) × 5/9:

Write down the Rankine temperature.
Subtract 491.67.
Multiply by 5/9.
The result is Celsius.

Solved Examples

Question 1: Convert 671.67°R to Celsius.

Solution:

°C = (671.67 - 491.67) × 5/9

= 180 × 5/9

Answer: 671.67°R = 100°C (boiling water)

Question 2: Convert 491.67°R to Celsius.

Solution:

°C = (491.67 - 491.67) × 5/9

= 0

Answer: 491.67°R = 0°C (freezing water)

Practice Questions

Try solving these on your own to test your understanding:

Convert 540°R to Celsius. (Answer: 26.85°C)
What is 0°R in Celsius? (Answer: -273.15°C)
Convert 900°R to Celsius. (Answer: 226.85°C)

Key Takeaways

°C = (°R - 491.67) × 5/9.
491.67°R = 0°C, 671.67°R = 100°C.
0°R = -273.15°C (absolute zero).

Rankine to Celsius Conversion Formula

°C = (°R × 5/9) − 273.15

1 Rankine = -272.5944444 Celsius

1 Celsius = 493.4700000 Rankine

Frequently Asked Questions

How many Celsius are in 1 Rankine?

1 Rankine equals -272.59444 Celsius. Note: Temperature conversion uses a formula, not simple multiplication.

How do I convert Rankine to Celsius?

Use the conversion formula shown above. For example, -270.37 Celsius equals 5 Rankine. Temperature scales have different zero points, so a formula (not simple multiplication) is required.

How do I convert Celsius to Rankine?

Use the reverse formula. 1 Celsius equals 493.47000 Rankine. See the formula section above for the exact equation.

What is 10 Rankine in Celsius?

10 Rankine is equal to -267.59444 Celsius.

What is 100 Rankine in Celsius?

100 Rankine is equal to -217.59444 Celsius.