Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin and Rankine instantly.
Value
From unit
Celsius (°C)
100
Fahrenheit (°F)
212
Kelvin (K)
373.15
Rankine (°R)
671.67
What this tool does
Converts temperature between Celsius, Fahrenheit, Kelvin and Rankine in real time. All four values update simultaneously as you type.
Input fields explained
Value
The temperature number to convert. Celsius and Fahrenheit accept negative values. Kelvin cannot be negative (absolute zero = 0 K).
From unit
Select the unit of your input. The other three units update immediately.
💡 Tips & context
→Quick mental conversion: double Celsius and add 30 for a rough Fahrenheit estimate.
→Water boils at 100°C = 212°F = 373.15 K.
Formula / How it works
°F↔°C: (F−32)×5/9 | °C→K: C+273.15 | Absolute zero = −273.15°C = 0K