Celsius to Rankine Converter
Convert Celsius to Rankine (and back) instantly. Uses the exact formula R = (C + 273.15) × 9/5.
Temperature Converter
Enter a value in either field. Conversion is instant.
Common Reference Values
| Celsius (°C) | Rankine (°R) | Description |
|---|---|---|
| −273.15 | 0 | Absolute zero |
| 0 | 491.67 | Water freezes |
| 20 | 527.67 | Room temp |
| 37 | 558.27 | Body temp |
| 100 | 671.67 | Water boils |
Formulas
R = (C + 273.15) × 9 / 5
C = R × 5 / 9 − 273.15
Rankine is an absolute scale. 1 Rankine degree equals 1 Fahrenheit degree; 1 Kelvin equals 9/5 Rankine.
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Summary
Convert Celsius to Rankine (and back) instantly. Uses the exact formula R = (C + 273.15) × 9/5.
How it works
- Enter a Celsius value in the top input field.
- The converter applies R = (C + 273.15) × 9/5 and shows the Rankine result instantly.
- Or enter a Rankine value in the bottom field — the converter reverses to C = R × 5/9 − 273.15.
- Results are rounded to four decimal places.
- Invalid or empty input clears the opposite field without crashing.
Use cases
- Engineering calculations that mix SI temperatures with Rankine-based thermodynamic equations.
- Converting absolute-zero references (−273.15°C = 0 R) for physics coursework.
- Cross-checking temperature readings between metric lab reports and imperial engineering specs.
- Quick sanity checks when working with Rankine-based refrigeration or combustion tables.
Frequently Asked Questions
Last updated: 2026-07-22 ·
Reviewed by Nham Vu