No offset required
Both scales begin at absolute zero.
Enter a Kelvin temperature to calculate degrees Rankine, Celsius, and Fahrenheit using the direct relationship between the two absolute temperature scales.
Degrees Rankine (°R) = kelvins (K) × 9 ÷ 5. Reverse: K = °R × 5 ÷ 9.
Both scales begin at absolute zero.
Converts Kelvin-sized intervals to Fahrenheit-sized intervals.
Also reports Celsius and Fahrenheit equivalents.
Kelvin and Rankine are both absolute temperature scales, so their zero points coincide at absolute zero. No offset is required: multiply kelvins by 9/5 to obtain degrees Rankine. For example, 300 K equals 540 °R. To reverse the conversion, multiply Rankine by 5/9.
The difference comes from interval size. A kelvin is the same size as one Celsius degree, while a Rankine degree is the same size as one Fahrenheit degree. This direct ratio makes Kelvin-to-Rankine conversion simpler than conversions involving Celsius or Fahrenheit offsets.
The kelvin symbol is K without a degree sign, while Rankine is commonly written °R. Preserve units in equations and datasets, and avoid rounding intermediate values when they feed later engineering calculations.
| Input | What it means | Planning note |
|---|---|---|
| 0 K | 0 °R | Absolute zero. |
| 273.15 K | 491.67 °R | Equivalent to 0 °C. |
| 300 K | 540 °R | Common engineering example. |
| 373.15 K | 671.67 °R | Equivalent to 100 °C. |
Convert Kelvin-based scientific data to Rankine.
Align absolute temperatures with US customary calculations.
Study absolute-zero temperature systems.
300 K equals exactly 540 °R.
Kelvin and Rankine both use absolute zero as their zero point.
1 K equals 1.8 °R.
No. Write kelvins as K; Rankine is commonly written with °R.
Last reviewed: August 13, 2026. Formulas use exact defined scale relationships; displayed results are rounded for readability.
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