Kelvin to Rankine
Kelvin is the SI base unit of temperature, starting at absolute zero, used throughout science and astronomy. Rankine is an absolute temperature scale using Fahrenheit-sized degrees, starting at absolute zero, used occasionally in US engineering. 1 K equals 1.8 °R, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to temperature, measured here against temperature's base unit (°C) — every other temperature unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
°R = K × 1.8
K = °R × ≈0.555556
Worked example: 5 K × 1.8 = 9 °R.
Conversion table
| Kelvin (K) | Rankine (°R) |
|---|---|
| 1 K | 1.8 °R |
| 2 K | 3.6 °R |
| 3 K | 5.4 °R |
| 5 K | 9 °R |
| 10 K | 18 °R |
| 20 K | 36 °R |
| 25 K | 45 °R |
| 50 K | 90 °R |
| 100 K | 180 °R |
| 250 K | 450 °R |
| 500 K | 900 °R |
| 1,000 K | 1,800 °R |
Frequently asked
- How many Rankine in a kelvin?
- 1 K equals 1.8 °R.
- How do I convert Kelvin to Rankine?
- Multiply the value in K by 1.8 to get °R. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Kelvin and Rankine are both defined by a fixed conversion factor to temperature's base unit (°C), so the result shown is exact to the precision displayed, not an approximation.