Convert kelvins to degrees Rankine

1 K=1.8°R

Use the converter below to change any kelvins value into degrees Rankine instantly — with formula, conversion table, and real-world examples.

You have

Equals

1.8

Conversion formula

Forward

°R = K × 9/5

Reverse

K = °R × 5/9

These temperature formulas are exact — no approximation involved.

About both units

From

Kelvin

The kelvin is the SI base unit of thermodynamic temperature. Its zero point is absolute zero — the theoretical coldest possible temperature. Water freezes at 273.15 K and boils at 373.15 K. Note: there is no "degree" symbol with kelvin, only "K".

Real-world: Room temperature ≈ 293 K. Water boils at 373 K. The Sun's surface is 5778 K. Deep space is about 2.7 K.

Read full kelvin reference →

Rankine

°R

The Rankine scale is an absolute scale whose degree size matches Fahrenheit. Zero °R is absolute zero (−459.67 °F). It is used in some US engineering thermodynamics — mainly aerospace, power plants and propulsion — where Fahrenheit-based calculations need an absolute reference.

Real-world: Room temperature ≈ 527 °R. Water boils at 671.67 °R. US rocket-engine thermodynamics textbooks use Rankine.

Read full rankine reference →

Kelvin to Rankine conversion table

Common kelvins to degrees Rankine values for quick reference.

Kelvin (K)	Rankine (°R)
-40 K	-72 °R
-20 K	-36 °R
0 K	0 °R
10 K	18 °R
20 K	36 °R
25 K	45 °R
30 K	54 °R
37 K	66.6 °R
100 K	180 °R
200 K	360 °R

Tips & common mistakes

Quick tips

K = °C + 273.15. Identical degree size; only the zero point differs.
There are no "degrees Kelvin" — just "kelvins". The symbol is K, not °K.
Colour temperature: 3000 K warm/yellow; 5000 K daylight; 6500+ K cool/blue.

Avoid these

Writing °K — incorrect. Kelvin uses no degree symbol.
Trying to use negative Kelvin values — impossible physically.
Confusing "kelvin" (unit) with "Kelvin" (the scientist William Thomson).

Frequently asked questions

How many degrees Rankine in a kelvin?

One kelvin equals 1.8 degrees Rankine.

How do I convert kelvins to degrees Rankine?

Temperature conversion is non-linear. From Kelvin to Rankine use the specific formula — this tool applies it automatically.

What is 100 kelvins in degrees Rankine?

100 kelvins equals 180 degrees Rankine.

Is a kelvin bigger than a rankine?

Temperature units compare by scale, not by size of one degree. Kelvin and Rankine use different zero points.

How to convert kelvins to degrees Rankine without a calculator?

Use the mental shortcut relevant to these temperature scales — but for accuracy always verify with a calculator.

Related temperature conversions

📊 See full comparison matrix →

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