Temperature Converter
Convert thermodynamic temperature scales between Celsius, Fahrenheit, and Kelvin. Convert between metric, US customary, and imperial units using documented conversion factors and high-precision decimal calculations.
Live Interactive Calculator
°F = (°C × 9/5) + 32Popular Temperature Conversions
Explore dedicated guides with exact formulas, conversion factors, worked calculation steps, and quick reference tables.
Celsius to Fahrenheit
Convert Celsius to Fahrenheit with exact formula and quick lookup tables.
Fahrenheit to Celsius
Convert Fahrenheit to Celsius with exact formula and quick lookup tables.
Celsius to Kelvin
Convert Celsius to Kelvin with exact formula and quick lookup tables.
Kelvin to Celsius
Convert Kelvin to Celsius with exact formula and quick lookup tables.
Fahrenheit to Kelvin
Convert Fahrenheit to Kelvin with exact formula and quick lookup tables.
Major Temperature Units & Definitions
Standard measurement units, measurement systems, and documented sources.
Celsius
°CThe Celsius temperature scale is defined such that 0 °C is 273.15 K (the approximate freezing point of water) and 100 °C is 373.15 K. An interval of 1 °C equals 1 Kelvin.
Fahrenheit
°FThe Fahrenheit scale sets the freezing point of water at 32 °F and boiling point at 212 °F under standard atmospheric pressure. Primarily used in the United States.
Kelvin
KThe Kelvin is the SI base unit of thermodynamic temperature. Absolute zero (0 K) corresponds to the complete absence of classical thermodynamic thermal energy.