Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine.
What is Temperature?
A temperature converter for the four common scales. Unlike linear units, temperatures use affine formulas with different zero points, so conversion is handled per-pair.
How it works
Each scale is converted to and from Celsius using its exact offset and factor, guaranteeing correct results in both directions.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Cooking temperatures
A recipe calling for 350°F converts to 177°C — with Kelvin available for scientific work and an exact-formula breakdown.
Common mistakes
Getting the formula backward
°F to °C subtracts 32 before scaling; °C to °F scales first then adds 32. The converter applies the correct direction automatically.
Frequently asked questions
Which scales are supported?
Celsius, Fahrenheit, and Kelvin — with formulas shown so you can verify any result.
Why does °F to °C not just divide?
The scales have different zero points — freezing is 0°C but 32°F — so the offset must be applied in addition to the 5/9 ratio.
Does it handle negative temperatures?
Yes, including Kelvin values below absolute zero, which are flagged as physically impossible.