Unit converter
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin with the correct offset formulas.
How the temperature converter works
Celsius to Fahrenheit: °F = (°C × 9/5) + 32. Celsius to Kelvin: K = °C + 273.15. The converter applies the reverse formulas when needed. Choose the source and target units above. Your conversion is calculated locally in your browser.
0°C = 32°F.
100°C = 212°F.
−40°C = −40°F.
Frequently asked questions
How do I use this unit converter?
Enter a value, choose its current unit and the unit you want, then select Convert. The result is calculated in your browser.
Can I convert decimal values?
Yes. Decimal values are supported and the result is rounded only for display.
Are these conversions exact?
The calculator uses the conversion factors shown in its formula. Display rounding can hide digits, so retain more precision when needed.
Can I enter zero or a negative number?
Zero is valid. Negative values are accepted for temperature and angle conversions; other physical quantities must be zero or positive.
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