Converter calculators
Temperature converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly. Great for travel, recipes, weather, and quick everyday comparisons.
Runs in your browser with no account and no stored data
How it works
Type a temperature into any of the three fields: Celsius, Fahrenheit, or Kelvin. The other two update instantly. No button needed.
°F = (°C × 9/5) + 32. K = °C + 273.15. °C = (°F − 32) × 5/9.
100°C = 212°F = 373.15 K (water boiling). −40°C = −40°F (the point where both scales meet).
Reading foreign weather forecasts, following international cooking recipes, science homework, or working across mixed-unit systems.
The formula converts numbers exactly, but context still matters. Conventional and fan ovens often use different settings, measured weather temperature is not the same as a ‘feels like’ value, and a Kelvin result below absolute zero is mathematically convertible but not physically meaningful.
What do you want to do next?
Continue to the unit converter if you also need length, weight, area, or volume conversions.
FAQ
When should I use Kelvin?+
Kelvin is commonly used in scientific and technical contexts where absolute temperatures matter.
Why can Kelvin not go below zero?+
0 K is absolute zero, the lowest theoretical temperature possible.