Celsius to Rankine – convert °C to R
Convert Celsius to Rankine (°C to R) for thermodynamics, engineering and high-temperature physics. Rankine is an absolute temperature scale, similar to Kelvin but based on Fahrenheit degrees. This page opens the main temperature converter with °C → R pre-selected.
Open the interactive °C → R converter:
Use main converter (°C → R) or switch to R → °COn the homepage you can switch freely between °C, °F, K and Rankine for any temperature you need.
Quick reference: °C to Rankine
Rankine uses the formula R = (°C + 273.15) × 9/5. Some common Celsius temperatures in Rankine:
| Celsius (°C) | Rankine (R, approx.) |
|---|---|
| -273.15 °C | 0 R (absolute zero) |
| -40 °C | 419.67 R |
| 0 °C | 491.67 R |
| 20 °C | 527.67 R |
| 37 °C | 558.27 R (body temperature) |
| 100 °C | 671.67 R (boiling water) |
Why convert Celsius to Rankine?
You might need °C → R when you:
- Work with older US engineering texts that quote temperatures in Rankine.
- Compare thermodynamic calculations done in Kelvin versus Rankine.
- Convert combustion or turbine temperatures into an absolute scale.
- Check problem sets or exam questions that mix °C, K and R.
Other temperature converters on this site
All four temperature scales on the homepage convert via Kelvin internally, keeping °C, °F, K and R consistent and reversible.
Last updated: 3 December 2025.