Kelvin to Rankine Converter
Kelvin (K) → Rankine (°R)
Also: 25 °C Celsius · 77 °F Fahrenheit
Show Your Work
- 1. R = 298.15 × 9/5
- 2. R = 536.67°R
About this conversion
Kelvin and Rankine are both absolute temperature scales — they share the same zero point (absolute zero) but differ in degree size. R = K × 9/5 captures the size ratio. No offset is needed because both scales start at the same physical zero.
Kelvin to Rankine Reference Table
| Kelvin (K) | Rankine (°R) |
|---|---|
| 0 | 0 |
| 50 | 90 |
| 77 | 138.6 |
| 100 | 180 |
| 150 | 270 |
| 200 | 360 |
| 250 | 450 |
| 273.15 | 491.67 |
| 298.15 | 536.67 |
| 300 | 540 |
| 350 | 630 |
| 373.15 | 671.67 |
| 400 | 720 |
| 500 | 900 |
| 750 | 1350 |
| 1000 | 1800 |
| 1500 | 2700 |
| 2000 | 3600 |
When to use Kelvin → Rankine
- Cross-checking values between metric scientific work (Kelvin) and U.S. engineering work (Rankine)
- Converting cryogenic temperatures between absolute scales
- Comparing thermodynamic constants tabulated in different unit systems
Worked Example
A reference is 298.15 K. What is that in Rankine?
- Start with the Kelvin value: K = 298.15.
- Multiply by 9/5: 298.15 × 9/5 = 536.67.
- So 298.15 K = 536.67°R.
Frequently Asked Questions
What is the formula to convert Kelvin to Rankine?
R = K × 9/5 (or equivalently R = K × 1.8). Multiply by 9/5 to scale up to Rankine-sized degrees; no offset because both scales share the absolute-zero origin.
What is 273.15 K in Rankine?
273.15 K = 491.67°R. Freezing point of water.
What is 0 K in Rankine?
0 K = 0°R. Both scales share absolute zero as their origin.
More Temperature Conversions
- Rankine to Kelvin — the reverse direction
- Kelvin to Celsius — same starting scale, different target
- Kelvin to Fahrenheit — same starting scale, different target
- Celsius to Rankine — different starting scale, same target
- Fahrenheit to Rankine — different starting scale, same target
- All-scale Temperature Converter — see Celsius, Fahrenheit, Kelvin, and Rankine at once
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