Convert

Rankine to Kelvin

Exact answer: K = °R × 5/9 (exact scale relationship)

Temperature has an offset. Rankine and Kelvin must not be treated like plain factor units. Temperature appears in weather reports, recipes, climate data and technical process figures.

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UnitCloud is a local measurement lab for everyday work, engineering, IT, energy, mobility and design. Every conversion shows result, formula, base unit, rounding and the common mistake.

What do you want to convert?

From1 °R

Result0.555556 K

FactorOffset formula

Source basisBIPM SI Brochure · NIST Metric SI · NIST Guide to SI Appendix B

Examples

011 °R = 0.555556 K

Example value from the reference table. Internal calculation uses stored factors; display output is rounded.

02Common mistake

Temperature uses an offset. Fahrenheit and Kelvin are not pure factor units.

03Base unit: °C

Temperature is first converted to Celsius and then moved to the target unit.

Table

Rankine to Kelvin
Rankine	Kelvin
1	0.555556
100	55.555556
491.67	273.15
671.67	373.15
1,000	555.555556
1,500	833.333333

Formula

Temperature is first converted to Celsius and then moved to the target unit.

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Metric SICurrent NIST SI overview after retirement of the historic SI Units site.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.

Related conversions

Kelvin to CelsiusK → °CTemperature Celsius to Kelvin°C → KTemperature Fahrenheit to Kelvin°F → KTemperature Kelvin to FahrenheitK → °FTemperature

Search and practice paths

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Factor origin

Factors come from the stored source family and are not derived from rounded display values.

Rounding rule

UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.

When not to use

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.

Citation

Citation note: UnitCloud, conversion with formula, sources reviewed: September 2026. Temperature. Source basis: BIPM SI Brochure · NIST Metric SI · NIST Guide to SI Appendix B.

Common questions

Which formula applies to Rankine to Kelvin?

K = °R × 5/9

Which formula does Rankine to Kelvin use?

Temperature is first converted to Celsius and then moved to the target unit.

What is the most common mistake?

Temperature uses an offset. Fahrenheit and Kelvin are not pure factor units.

When should I verify the result?

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.