Units & conversion · Units
Temperature Converter
Convert temperature between Celsius, Fahrenheit, and Kelvin instantly. Enter any value and see all three units at once. Free online temperature converter.
Enter values above to see the result.
How it works
Converts a temperature between Celsius, Fahrenheit, and Kelvin simultaneously. Enter a value in any unit and instantly see the equivalent in all three scales.
Formula
°F = °C × 9/5 + 32 | K = °C + 273.15
- °C
- Temperature in Celsius
- °F
- Temperature in Fahrenheit
- K
- Temperature in Kelvin
Step by step
- 1Enter a temperature value and select the source unit.
- 2The tool first converts to Celsius as an intermediate step.
- 3From Celsius: °F = °C × 9/5 + 32, K = °C + 273.15.
- 4All three results are shown simultaneously.
Examples
Boiling point of water
Water boils at 100°C, 212°F, or 373.15 K at standard atmospheric pressure.
Inputs
- value:
- 100
- from_unit:
- C
Result
- celsius:
- 100.0 °C
- fahrenheit:
- 212.0 °F
- kelvin:
- 373.15 K
Body temperature
Normal human body temperature is 98.6°F = 37°C.
Inputs
- value:
- 98.6
- from_unit:
- F
Result
- celsius:
- 37.0 °C
- fahrenheit:
- 98.6 °F
- kelvin:
- 310.15 K
Note: Absolute zero is −273.15°C / −459.67°F / 0 K — the coldest possible temperature. The Celsius and Fahrenheit scales share the same value at −40°.
Frequently asked questions
How do I convert Celsius to Fahrenheit?▾
Multiply the Celsius value by 9/5 (or 1.8) and then add 32. For example: 20°C × 1.8 + 32 = 68°F.
What is absolute zero in Celsius?▾
Absolute zero — the lowest possible temperature — is −273.15°C (−459.67°F or 0 K).