Instantly convert Celsius, Fahrenheit, and Kelvin — all at once
Input
Converted Values
Quick Reference
| Reference point | °C | °F | K | |
|---|---|---|---|---|
| Absolute zero | -273.15 | -459.67 | 0 | use |
| Water freezes | 0 | 32 | 273.15 | use |
| Room temperature | 22 | 71.6 | 295.15 | use |
| Body temperature | 37 | 98.6 | 310.15 | use |
| Water boils | 100 | 212 | 373.15 | use |
| Oven (baking) | 180 | 356 | 453.15 | use |
Click any row to load that reference value into the converter.
Conversion Formulas
Need to convert a temperature fast? Our free temperature converter handles Celsius, Fahrenheit, and Kelvin simultaneously — just type a value, pick your source scale, and all three results appear instantly. Whether you are cooking, studying science, or reading a weather report from another country, this tool gives you accurate conversions with the formulas shown so you always understand the math.
Multiply the Celsius value by 9/5, then add 32. For example, 100 °C equals (100 × 9/5) + 32 = 212 °F. The converter does this automatically the moment you type.
Absolute zero — the coldest theoretically possible temperature — is 0 K, −273.15 °C, and −459.67 °F. The converter blocks any input below absolute zero because such temperatures cannot physically exist.
Kelvin is an absolute thermodynamic scale defined by the International System of Units (SI). Because it starts at absolute zero, it is written as a plain unit (e.g. 300 K) rather than 300 °K.
Average body temperature is about 37 °C, which equals 98.6 °F and 310.15 K. You can click the 'Body temperature' row in the quick-reference table to load this value instantly.