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Universal conversion tools for everyday use

Temperature Converter

Convert temperatures between Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R), Réaumur (°Ré), and more. This tool is accurate, fast, and works entirely in your browser.

Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin and Rankine.

How to Convert Temperatures

Temperature is a fundamental physical quantity that measures the average kinetic energy (motion) of particles in a substance. In simple terms, it tells us how hot or cold something is.

When particles move faster, the temperature is higher; when they move slower, the temperature is lower. This energy is not visible to the eye, but we experience it through sensations of heat and cold.

Conversion Formulas between Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R)

Celsius ↔ Fahrenheit

°F = (°C × 1.8) + 32
°C = (°F - 32) × 5/9

Celsius ↔ Kelvin

K = °C + 273.15
°C = K - 273.15

Celsius ↔ Rankine

°R = (°C + 273.15) × 1.8
°C = (°R - 491.67) × 5/9

Fahrenheit ↔ Kelvin

K = (°F - 32) × 5/9 + 273.15
°F = (K - 273.15) × 1.8 + 32

Fahrenheit ↔ Rankine

°R = °F + 459.67
°F = °R - 459.67
°R = K × 1.8
K = °R ÷ 1.8

Celsius ↔ Réaumur

°Ré = °C × 0.8
°C = °Ré ÷ 0.8

Common Temperature References

  • Absolute Zero-273.15°C
    -459.67°F / 0K
  • Freezing point of water0°C
    32°F / 273.15K
  • Average room temperature20–25°C
    68–77°F / 293–298K
  • Normal human body temperature37°C
    98.6°F / 310.15K
  • Boiling point of water100°C
    212°F / 373.15K
  • Surface of the Sun~5,500°C
    ~10,000°F / ~5,800K
  • Moon's Surface (Sunlit Side)127°C
    260°F / 400K
  • Moon's Surface (Dark Side)-173°C
    -280°F / 100K
  • Hottest Place (Lut Desert, Iran)80.3°C
    176.5°F / 353.45K
    Coordinates: 30.6°N, 59.0°E
  • Coldest Place (Vostok Station, Antarctica)-89.2°C
    -128.6°F / 183.95K
    Coordinates: 78.5°S, 106.8°E

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