Celsius, Fahrenheit and Kelvin: translate any temperature in one keystroke.
Temperature is the conversion you meet daily and trust blindly — until it matters. Weather forecasts, oven dials, fever readings and pool heaters all speak Fahrenheit or Celsius depending on where you stand, and the two scales disagree wildly: 25 is a warm day in Celsius but freezing in Fahrenheit.
The converters below handle the offset that makes temperature special (it's not just a multiplication — 0° doesn't mean "nothing"). Each page includes the formula, the landmarks that anchor everyday life — body temperature, fever, baking — and the famous −40° point where both scales finally agree.
Every converter here is built for the moments temperature really matters: is 38 °C a fever? Is 180 °C right for cookies? Will 30 °C feel hot on vacation? You get the exact conversion, the formula behind it, and the everyday landmarks — body heat, baking, weather — that turn numbers into decisions you can act on.
Are these converters really free? Yes — unlimited, no account, no paywall. CalculUnits is funded by non-intrusive ads only.
How accurate are the results? Every conversion uses the exact official factor from SI and NIST references, shown on each page so you can verify the math yourself.
Do my values leave my device? No — all calculations run in your browser. Nothing you type is ever sent anywhere.