Temperature Converter
The kelvin (K) is the base temperature unit here, so every one of the 3 units below, including degrees Celsius and degrees Fahrenheit, converts through it. Enter a value, pick your units, and the result updates instantly, all in your browser.
All temperature units
| Unit | Symbol | 1 unit in kelvin |
|---|---|---|
| Celsius | °C | 274.15 |
| Fahrenheit | °F | 255.93 |
| Kelvin | K | 1 |
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The most-searched temperature conversions, each with a full decimal table, the derivation of the factor and its sources.
Temperature does not scale with a single multiplier because each scale has a different zero point, so UnitGlide converts through Kelvin using exact formulas rather than factors. That keeps Celsius, Fahrenheit and Kelvin conversions correct at every value.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 and add 32. For example, 20 degrees Celsius is 68 degrees Fahrenheit. UnitGlide applies the exact formula rather than a rounded factor.
At what temperature do Celsius and Fahrenheit meet?
They read the same at minus 40 degrees. That single point is where the two scales cross, which makes it a handy sanity check for any converter.
What is absolute zero in Celsius?
Absolute zero is 0 kelvin, which equals minus 273.15 degrees Celsius or minus 459.67 degrees Fahrenheit. It is the lowest temperature that is physically possible.