Temperature Converter
Last updated: November 5, 2026
Convert Celsius to Fahrenheit, Kelvin and Rankine temperatures.
Temperature in Fahrenheit
—
- Temperature in Kelvin: —
- Temperature in Rankine: —
- Temperature in Celsius: —
On this page
Quick summary: Convert Celsius to Fahrenheit, Kelvin and Rankine temperatures.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Convert Celsius to Fahrenheit, Kelvin and Rankine temperatures.
How to use it
Enter Temperature in Celsius. Select Calculate to update the results.
How the calculation works
Fahrenheit equals Celsius times nine-fifths plus 32, and Kelvin equals Celsius plus 273.15.
Worked example: starting scenario
| Temperature in Celsius | 25 |
|---|
| Temperature in Fahrenheit | 77 °F |
|---|---|
| Temperature in Kelvin | 298.15 K |
| Temperature in Rankine | 536.67 °R |
| Temperature in Celsius | 25 °C |
Important limitations
The input cannot be below absolute zero.
Offsets make temperature ratios misleading
Celsius and Fahrenheit use different zero points, so 20 °C is not twice as hot as 10 °C in an absolute-temperature sense. For −40 °C, Fahrenheit is also −40 °F, Kelvin is 233.15 K and Rankine is 419.67 °R. Kelvin = Celsius + 273.15; Rankine = Kelvin × 9/5. Absolute zero is −273.15 °C, and this form rejects a lower temperature.