Temperature Scales Converter
Convert a temperature between Celsius, Fahrenheit, and Kelvin all at once.
Why the conversion isn't just a ratio
Unlike most unit conversions, temperature scales don't share a common zero point, so converting requires both a multiplication and an addition or subtraction — for example, °F = °C × 9/5 + 32. Treating it as a simple multiplicative ratio is a common source of errors.
Kelvin is the odd one out, for a reason
Kelvin starts at absolute zero, so it has no negative values — which is why it's the standard scale in scientific formulas like the ideal gas law. Celsius and Fahrenheit are convenient for everyday use, but Kelvin is what most physics equations actually expect.