Convert Rankine Interval to Kelvin Interval
Live bidirectional calculator for Rankine Intervals (Δ°R) and Kelvin Intervals (K) with verified formula and conversion charts.
Temperature Interval5 units
How the Calculation Works (Linear Scaling)
Since 1 Kelvin Interval = 1.8 Rankine Intervals, divide the value in Rankine Intervals by 1.8.
Rankine Interval to Kelvin Interval Conversion Table
Precomputed values for quick reference and printing.
| Rankine Interval | Kelvin Interval |
|---|---|
| 1 Δ°R | 0.5556 K |
| 2 Δ°R | 1.1111 K |
| 3 Δ°R | 1.6667 K |
| 4 Δ°R | 2.2222 K |
| 5 Δ°R | 2.7778 K |
| 6 Δ°R | 3.3333 K |
| 7 Δ°R | 3.8889 K |
| 8 Δ°R | 4.4444 K |
| 9 Δ°R | 5 K |
| 10 Δ°R | 5.5556 K |
| 15 Δ°R | 8.3333 K |
| 20 Δ°R | 11.1111 K |
| 25 Δ°R | 13.8889 K |
| 30 Δ°R | 16.6667 K |
| 40 Δ°R | 22.2222 K |
| 50 Δ°R | 27.7778 K |
| 75 Δ°R | 41.6667 K |
| 100 Δ°R | 55.5556 K |
| Kelvin Interval | Rankine Interval |
|---|---|
| 1 K | 1.8 Δ°R |
| 2 K | 3.6 Δ°R |
| 3 K | 5.4 Δ°R |
| 4 K | 7.2 Δ°R |
| 5 K | 9 Δ°R |
| 6 K | 10.8 Δ°R |
| 7 K | 12.6 Δ°R |
| 8 K | 14.4 Δ°R |
| 9 K | 16.2 Δ°R |
| 10 K | 18 Δ°R |
| 15 K | 27 Δ°R |
| 20 K | 36 Δ°R |
| 25 K | 45 Δ°R |
| 30 K | 54 Δ°R |
| 40 K | 72 Δ°R |
| 50 K | 90 Δ°R |
| 75 K | 135 Δ°R |
| 100 K | 180 Δ°R |
About Rankine Interval (Δ°R)
A temperature difference of 1 degree Rankine, identical in magnitude to 1 degree Fahrenheit interval (5/9 K).
History: Introduced by Scottish physicist William John Macquorn Rankine in 1859 for thermodynamic calculations in English engineering units.
Common Uses: Aerospace propulsion thermodynamics, combustion calculations in US customary engineering.
About Kelvin Interval (K)
The kelvin interval is the SI unit representing a temperature difference or interval of 1 kelvin, without an absolute thermodynamic zero offset.
History: Defined by the BIPM to rigorously distinguish temperature differences (ΔT) from thermodynamic temperature readings (T).
Common Uses: Thermodynamic difference equations, thermal equipment temperature rise ratings, heat transfer delta-T formulas.
❓ Frequently Asked Questions
How many Kelvin Intervals are in 1 Rankine Interval?
There are exactly 0.555556 Kelvin Intervals in 1 Rankine Interval (1 Δ°R = 0.555556 K).
What is the formula to convert Rankine Interval to Kelvin Interval?
The formula is: Kelvin Interval = Rankine Interval / 1.8. Since 1 Kelvin Interval = 1.8 Rankine Intervals, divide the value in Rankine Intervals by 1.8.
How do I convert 1 Δ°R to K manually?
To convert 1 Δ°R to K: apply the formula Kelvin Interval = Rankine Interval / 1.8. Substituting gives: 1 / 1.8 = 0.5556 K.