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Convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine instantly.
Temperature Converter instantly converts values between different units of measurement using precise conversion factors. It supports metric and imperial systems with real-time calculations as you type.
Convert temperatures instantly between Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R). Perfect for cooking, science, weather, and travel. Features real-time conversion, temperature reference charts, and precise decimal handling.
Enter a temperature value in any input field.
Select your source unit (Celsius, Fahrenheit, Kelvin, or Rankine).
All other units update automatically in real-time.
Use the quick reference chart for common temperatures.
Conversions use internationally standardized conversion factors (e.g., 1 inch = 2.54 cm exactly). Calculations are performed client-side in your browser using JavaScript's high-precision arithmetic for instant results without server calls.
Multiply Celsius by 9/5, then add 32. For example, 20°C × 9/5 = 36, then 36 + 32 = 68°F.
Absolute zero is 0 Kelvin or -273.15°C (-459.67°F). It's the theoretical lowest possible temperature where all molecular motion stops.
Most of the world uses Celsius. The United States primarily uses Fahrenheit. Kelvin is used in scientific contexts globally.