Tool
Temperature Converter
Type any value — Celsius, Fahrenheit, or Kelvin — and all three update instantly.
Celsius
°C
Fahrenheit
°F
Kelvin
K
Common temperatures
About the Temperature Converter
Three temperature scales exist, and they each measure the same thing — thermal energy — but start and scale differently. Knowing which one you're in matters when reading a weather forecast, following a recipe, or doing a physics problem.
Celsius is the global standard. Water freezes at 0°C and boils at 100°C. It's what weather apps, cooking recipes, and thermostats use almost everywhere outside the United States.
Fahrenheit is used primarily in the US. Water freezes at 32°F and boils at 212°F. If a US weather app says 95°F, that's 35°C — a hot day.
Kelvin is the scientific standard. It uses the same step size as Celsius but starts at absolute zero — the coldest possible temperature, −273.15°C. There are no negative Kelvin values. Scientists use it because equations like the ideal gas law require an absolute scale with no negatives.
Converting between them is just arithmetic. Celsius to Fahrenheit: multiply by 9/5, then add 32. Fahrenheit to Celsius: subtract 32, then multiply by 5/9. Celsius to Kelvin: add 273.15. This converter does the math as you type.
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