Temperature Converter
Enter any temperature and instantly see it in all three units.
About the Temperature Converter
The temperature converter converts between Celsius, Fahrenheit and Kelvin instantly. Enter any value in any field and all three update simultaneously.
How to use the Temperature Converter
Temperature scales explained
Three temperature scales are in everyday and scientific use, and this converter handles all three instantly.
Celsius (°C) is used for weather and cooking across most of the world. On the Celsius scale the freezing point of water is 0°C and the boiling point is 100°C at sea level.
Fahrenheit (°F) is used mainly in the United States. Water has a freezing point of 32°F and a boiling point of 212°F, and normal body temperature is about 98.6°F.
Kelvin (K) is the SI base unit of temperature, used throughout science. It starts at absolute zero — the coldest temperature physically possible — which is 0 K, or −273.15°C. Kelvin uses the same size degree as Celsius but has no negative values and no degree symbol.
How to Convert Temperature
Whether you're checking the weather abroad, following an international recipe or working through a science problem, converting between Celsius, Fahrenheit and Kelvin comes down to a few simple formulas.
Temperature conversion formulas
- Celsius to Fahrenheit: (°C × 9/5) + 32
- Fahrenheit to Celsius: (°F − 32) × 5/9
- Celsius to Kelvin: °C + 273.15
- Kelvin to Celsius: K − 273.15
- Fahrenheit to Kelvin: (°F − 32) × 5/9 + 273.15
- Kelvin to Fahrenheit: (K − 273.15) × 9/5 + 32
Common temperatures compared
| Reference point | °C | °F | K |
|---|---|---|---|
| Absolute zero | −273.15 | −459.67 | 0 |
| Freezing point of water | 0 | 32 | 273.15 |
| Cold winter day | −10 | 14 | 263.15 |
| Room temperature | 20 | 68 | 293.15 |
| Normal body temperature | 37 | 98.6 | 310.15 |
| Hot summer day | 35 | 95 | 308.15 |
| Boiling point of water | 100 | 212 | 373.15 |
| Moderate oven | 180 | 356 | 453.15 |
Temperature conversion comes up more often than you might think: setting an oven from a recipe written in another country, checking a holiday forecast given in unfamiliar units, reading a fever in °F when your thermometer shows °C, or turning lab readings into Kelvin. Enter any value above and this tool shows the equivalent in all three scales at once, so you never have to do the maths by hand.