Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
Celsius, Fahrenheit, and Kelvin each use a different zero point and scale, which is why the conversion formulas aren't simple ratios — this converts live between all three as you type.
Why the conversion isn't a simple multiplier
Celsius and Fahrenheit have different zero points, so converting requires both a scale factor and an offset — that's why the formula is °F = °C × 9/5 + 32, not just a straight multiplication.
Frequently asked questions
Why does science use Kelvin instead of Celsius?
Kelvin starts at absolute zero, making it useful for scientific calculations where negative temperatures would cause problems.
Is there a quick mental shortcut for Celsius to Fahrenheit?
Double the Celsius figure and add 30 gets you reasonably close for casual estimates — not precise enough for anything technical.