Celsius to Rankine Converter
Convert °C to Rankine: (°C + 273.15) × 9/5. 0°C = 491.67°R. Free tool for engineering and thermodynamics.
How to Convert Celsius to Rankine
Add 273.15 to Celsius, then multiply by 9/5.
Conversion Formula:
(value + 273.15) * 9/5Conversion Examples
Example: 0°C to °R
- (0 + 273.15) × 9/5 = 491.67°R
491.67°R
Water freezing.
Example: 100°C to °R
- (100 + 273.15) × 9/5 = 671.67°R
671.67°R
Water boiling.
Conversion Chart
| Celsius | Rankine |
|---|---|
| -50 | 401.67 |
| -20 | 455.67 |
| 0 | 491.67 |
| 10 | 509.67 |
| 20 | 527.67 |
| 25 | 536.67 |
| 30 | 545.67 |
| 50 | 581.67 |
| 75 | 626.67 |
| 100 | 671.67 |
Conversion Formula
(°C + 273.15) × 9/5 = °R
Quick Conversion Tip
Add 273.15 then multiply by 9/5—same offset as Kelvin but Fahrenheit-sized steps.
Unit Definitions
Celsius (°C)
Metric temperature scale tied to water phase change points.
To Rankine, shift to absolute zero (add 273.15) then scale by 9/5. Direct to Fahrenheit uses (°C × 9/5) + 32.
Rankine (°R)
Absolute temperature scale using Fahrenheit-sized degrees, starting at absolute zero.
Rankine relates to Fahrenheit by °R = °F + 459.67. Convert from Kelvin by multiplying by 9/5.
Common Use Cases
- Thermodynamics homework (US units).
- Engineering heat-transfer problems.
- Comparing to °F-based absolute scale.
- Rankine cycle calculations.
Understanding the Conversion
°R = (°C + 273.15) × 9/5. Convert to Kelvin scale size, then to Rankine.
0°C = 491.67°R · 100°C = 671.67°R · −273.15°C = 0°R (absolute zero).
Rankine uses Fahrenheit-sized degrees starting at absolute zero—common in US engineering thermodynamics.
FAQs
What is Celsius to Rankine formula?
°R = (°C + 273.15) × 9/5.
What is 0°C in Rankine?
491.67°R (not zero—Rankine zero is absolute zero).
Rankine vs Kelvin?
Same zero point; 1 K change = 1.8°R change (Rankine uses °F-sized degrees).