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Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin instantly. Understand temperature scales with detailed explanations and formulas.

Celsius (°C)

°C
0.00
°F

Fahrenheit (°F)

°F
32.00
°C

Kelvin (K)

K
273.15
°C
Absolute Zero
-273.15°C
Coldest possible temperature
Water Freezes
0°C / 32°F
Freezing point of water
Room Temperature
20°C / 68°F
Comfortable indoor temperature
Human Body
37°C / 98.6°F
Normal body temperature
Water Boils
100°C / 212°F
Boiling point of water
-273.15°C
Absolute Zero
0°C
Water Freezes
20°C
Room Temp
37°C
Body Temp
100°C
Water Boils

Temperature Conversion Formulas

Celsius to Fahrenheit

°F = (°C × 9/5) + 32

Multiply Celsius by 9/5 and add 32 to get Fahrenheit

Fahrenheit to Celsius

°C = (°F - 32) × 5/9

Subtract 32 from Fahrenheit and multiply by 5/9 to get Celsius

Celsius to Kelvin

K = °C + 273.15

Add 273.15 to Celsius to get Kelvin (absolute temperature)

Kelvin to Celsius

°C = K - 273.15

Subtract 273.15 from Kelvin to get Celsius

Fahrenheit to Kelvin

K = (°F - 32) × 5/9 + 273.15

Convert Fahrenheit to Celsius first, then add 273.15

Kelvin to Fahrenheit

°F = (K - 273.15) × 9/5 + 32

Convert Kelvin to Celsius first, then to Fahrenheit

About Temperature Scales

Celsius (°C)

Inventor: Anders Celsius (1742)
Base Points: 0°C (water freezes), 100°C (water boils)
Usage: Most countries worldwide, scientific research
Range: -273.15°C (absolute zero) to ∞

Fahrenheit (°F)

Inventor: Daniel Gabriel Fahrenheit (1724)
Base Points: 32°F (water freezes), 212°F (water boils)
Usage: United States, Bahamas, Cayman Islands
Range: -459.67°F (absolute zero) to ∞

Kelvin (K)

Inventor: William Thomson, Lord Kelvin (1848)
Base Points: 0K (absolute zero), 273.15K (water freezes)
Usage: Scientific research, thermodynamics
Range: 0K (absolute zero) to ∞

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