Convert Celsius, Fahrenheit and Kelvin, with the formulas shown.
1
33.8
274.15
Body temperature
98.6°F in Celsius
98.6Oven setting
A common baking temperature
180Absolute zero
The coldest possible temperature
0Body temperature
98.6°F in Celsius
98.6Oven setting
A common baking temperature
180Absolute zero
The coldest possible temperature
0Type the value and pick the scale it is in. Negative numbers are fine.
Celsius, Fahrenheit and Kelvin all update together, with the conversion formula shown beneath.
Water freezes at 0°C, 32°F, 273.15K and boils at 100°C, 212°F — quick sanity checks that the number looks right.
Seeing °F = °C × 9/5 + 32 next to the result means you can do it in your head next time, or verify the tool is right.
Temperature is not a simple ratio. Scales with different zero points need a formula, which is precisely where mental arithmetic goes wrong.
Kelvin shares the Celsius degree size but starts at absolute zero, which matters for any physics or chemistry calculation.
Temperature is the one conversion people get wrong, because the scales have different zero points as well as different degree sizes — you cannot simply multiply. This converter handles all three common scales and shows the formula alongside each result, so you can check the arithmetic or memorise it. Useful reference points such as the freezing and boiling points of water, body temperature and absolute zero are marked.
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