Rankine to Kelvin Converter
Convert Rankine to Kelvin: multiply by 5/9. 0°R = 0 K. Free absolute temperature calculator for engineering.
How to Convert Rankine to Kelvin
Multiply Rankine by 5/9.
Conversion Formula:
value * 5/9Conversion Examples
Example: 491.67°R to K
- 491.67 × 5/9 = 273.15 K
273.15 K
Freezing point of water.
Example: 540°R to K
- 540 × 5/9 = 300 K
300 K
Round lab value.
Conversion Chart
| Rankine | Kelvin |
|---|---|
| 400 | 222.22 |
| 419.67 | 233.15 |
| 459.67 | 255.37 |
| 491.67 | 273.15 |
| 527.67 | 293.15 |
| 536.67 | 298.15 |
| 558.27 | 310.15 |
| 600 | 333.33 |
| 671.67 | 373.15 |
| 720 | 400 |
Conversion Formula
°R × 5/9 = K
Quick Conversion Tip
Multiply Rankine by 5/9 (divide by 1.8) for Kelvin.
Unit Definitions
Rankine (°R)
Absolute scale using Fahrenheit-sized degrees.
Multiply by 5/9 to reach Kelvin. Subtract 459.67 to reach Fahrenheit. Subtract 491.67 and multiply by 5/9 to reach Celsius.
Kelvin (K)
SI absolute temperature scale using Celsius-sized degrees.
Multiply Rankine by 5/9 to reach Kelvin. Convert Kelvin to Celsius by subtracting 273.15 and to Fahrenheit with (K − 273.15) × 9/5 + 32.
Common Use Cases
- SI gas laws from °R data.
- Thermodynamic efficiency calcs.
- Research unit consistency.
- Exam cross-checks.
Understanding the Conversion
K = °R × 5/9. Inverse of K → °R.
491.67°R = 273.15 K · 0°R = 0 K.
Brings US Rankine readings into SI Kelvin for science and engineering.
SI gas laws from °R data. The table and FAQ on this page walk through the factor if you need it.
FAQs
How do you convert Rankine to Kelvin?
Multiply by 5/9.
What is absolute zero in both scales?
0°R = 0 K.
Rankine to Celsius?
First °R × 5/9 = K, then K − 273.15 = °C.