Temperature Converter

The Temperature Converter is a free online tool that lets you instantly convert between Celsius, Fahrenheit, Kelvin, Rankine, and more. Perfect for students, scientists, engineers, or anyone needing quick and accurate temperature conversions.

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Temperature Units Information

Celsius (°C)

The Celsius scale is a temperature scale used by the International System of Units (SI). It is named after Anders Celsius.

  • Water freezes at 0°C and boils at 100°C at 1 atm pressure
  • Room temperature is typically around 20-25°C
  • Human body temperature is about 37°C
°F = (°C × 9/5) + 32
K = °C + 273.15

Fahrenheit (°F)

The Fahrenheit scale is a temperature scale based on one proposed by the physicist Daniel Gabriel Fahrenheit.

  • Water freezes at 32°F and boils at 212°F at 1 atm pressure
  • Room temperature is typically around 68-77°F
  • Human body temperature is about 98.6°F
°C = (°F - 32) × 5/9
K = (°F - 32) × 5/9 + 273.15

Kelvin (K)

The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero.

  • Absolute zero is 0 K (-273.15°C or -459.67°F)
  • Water freezes at 273.15 K and boils at 373.15 K
  • Used primarily in scientific contexts
°C = K - 273.15
°F = (K - 273.15) × 9/5 + 32