Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin. See all three values simultaneously.
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Celsius
100 °C
Fahrenheit
212 °F
Kelvin
373.15 K
Conversion Formulas
°F = °C × 9/5 + 32
°C = (°F − 32) × 5/9
K = °C + 273.15
°C = K − 273.15
Frequently Asked Questions
What is the formula to convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5 and add 32. For example, 100°C equals (100 × 9/5) + 32 = 212°F.
What is absolute zero in each temperature scale?
Absolute zero is 0 K (Kelvin), which equals -273.15°C and -459.67°F. It is the lowest theoretically possible temperature where molecular motion stops.
When should I use Kelvin instead of Celsius?
Kelvin is used in scientific calculations, especially in physics and chemistry, because it starts at absolute zero and has no negative values, simplifying thermodynamic equations.