Convert Kelvin (K) to Rankine (°R) instantly. Enter any value and get the result immediately.
K → °R Converter
| Kelvin (K) | Rankine (°R) |
|---|---|
| 0.1 K | 0.18 °R |
| 0.5 K | 0.9 °R |
| 1 K | 1.8 °R |
| 2 K | 3.6 °R |
| 5 K | 9 °R |
| 10 K | 18 °R |
| 20 K | 36 °R |
| 50 K | 90 °R |
| 100 K | 180 °R |
| 200 K | 360 °R |
| 500 K | 900 °R |
| 1000 K | 1800 °R |
| 5000 K | 9000 °R |
| 10000 K | 18,000 °R |
Kelvin to Rankine is one of the simplest temperature conversions — both scales start at absolute zero, so you just multiply by 1.8:
Why 1.8? Because Rankine uses Fahrenheit-sized degrees and Kelvin uses Celsius-sized degrees. Since 1°C = 1.8°F in degree size, 1 K = 1.8°R.
Examples:
Both Kelvin and Rankine are absolute temperature scales — they both start at the same point: absolute zero. The only difference is their degree size:
Since 1°C = 1.8°F, it follows that 1 K = 1.8°R — always. No addition or subtraction needed, unlike conversions involving Celsius or Fahrenheit.
Kelvin (K) is the SI base unit of temperature and the international scientific standard. Named after Lord Kelvin (William Thomson), it starts at absolute zero (0 K = -273.15°C). It uses Celsius-sized degrees and no degree symbol — written simply as "K". Used in all scientific fields worldwide including physics, chemistry, and astronomy.
Rankine (°R) is an absolute temperature scale proposed by Scottish engineer William John Macquorn Rankine in 1859. Like Kelvin, it starts at absolute zero (0°R = -459.67°F). Unlike Kelvin, it uses Fahrenheit-sized degrees. Rankine is primarily used in US engineering thermodynamics — especially in aerospace, HVAC, and steam power systems. The famous Rankine Cycle used in steam turbines is named after him.
| Kelvin (K) | Rankine (°R) | Reference Point |
|---|---|---|
| 0 K | 0 °R | Absolute zero (same in both!) |
| 1 K | 1.8 °R | Basic conversion reference |
| 4 K | 7.2 °R | Liquid helium temperature |
| 77 K | 138.6 °R | Liquid nitrogen temperature |
| 255.37 K | 459.67 °R | 0°F (Fahrenheit zero) |
| 273.15 K | 491.67 °R | Freezing point of water |
| 293.15 K | 527.67 °R | Room temperature |
| 310.15 K | 558.27 °R | Normal body temperature |
| 373.15 K | 671.67 °R | Boiling point of water |
| 1000 K | 1800 °R | Industrial furnace |
| 5778 K | 10,400.4 °R | Surface of the Sun |
| Feature | Kelvin (K) | Rankine (°R) |
|---|---|---|
| Proposed by | Lord Kelvin, 1848 | W.J.M. Rankine, 1859 |
| Absolute zero | 0 K | 0 °R |
| Degree size | Same as Celsius | Same as Fahrenheit |
| Degree symbol | No (just K) | Yes (°R) |
| Freezing point of water | 273.15 K | 491.67 °R |
| Boiling point of water | 373.15 K | 671.67 °R |
| Conversion | °R ÷ 1.8 | K × 1.8 |
| Primary use | Science worldwide | US Engineering |
The formula is: °R = K × 1.8. Simply multiply Kelvin by 1.8. Example: 300 K × 1.8 = 540°R.
273.15 K = 491.67°R. This is the freezing point of water. Formula: 273.15 × 1.8 = 491.67°R.
373.15 K = 671.67°R. This is the boiling point of water at sea level. Formula: 373.15 × 1.8 = 671.67°R.
0 K = 0°R. Both scales start at absolute zero — so 0 K and 0°R represent the exact same temperature. This is the unique property of both being absolute scales.
Both are absolute scales starting at absolute zero. Kelvin uses Celsius-sized degrees (used in science worldwide), while Rankine uses Fahrenheit-sized degrees (used in US engineering). Relation: 1 K = 1.8°R.
1 K = 1.8°R. This is the fundamental relationship between the two scales — every single Kelvin equals exactly 1.8 Rankine degrees.