🌡️ Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin instantly — with a full conversion table and the formula shown. Free, accurate and private.
20 °C = 68 °F
Convert Any Temperature Scale
Celsius, Fahrenheit and Kelvin — accurate to six decimals, instantly.
All Three Scales
Celsius, Fahrenheit and Kelvin — convert any one to the others at once.
Instant & Two-Way
Swap the direction with one tap; results update the moment you type.
Formula Shown
See exactly how each conversion is calculated, not just the answer.
Free & Private
Runs in your browser — no login, no limits, dark mode and responsive.
How to Convert Temperature
Four steps — results update the moment you type.
Enter a temperature
Type the value you want to convert into the 'from' box.
Pick the units
Choose the scale you're converting from and to — or tap swap.
Read the result
The converted value and a full table of all scales appear instantly.
Convert again
Change the value or units anytime — no reloads, no waiting.
Frequently Asked Questions
Celsius to Fahrenheit, Fahrenheit to Celsius, Kelvin, body temperature and absolute zero.
How do I convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5 (1.8) and add 32. For example, 20°C × 1.8 + 32 = 68°F. Type a value in the Celsius box above and it converts instantly.
How do I convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit temperature, then multiply by 5/9. For example, (98.6°F − 32) × 5/9 = 37°C. Select Fahrenheit as the 'from' unit to do this automatically.
How do I convert Celsius to Kelvin?
Add 273.15 to the Celsius temperature. So 25°C = 298.15 K. Kelvin has no degree symbol and starts at absolute zero (−273.15°C), the coldest possible temperature.
What is a normal body temperature in Celsius and Fahrenheit?
Average body temperature is about 37°C, which is 98.6°F. A common fever threshold is 38°C (100.4°F). You can check any of these instantly by typing the value above.
What is 0 Kelvin?
0 Kelvin is absolute zero — the theoretical point at which all molecular motion stops. It equals −273.15°C or −459.67°F. Temperatures can't go below it.
Is this temperature converter free?
Yes. It's completely free, needs no sign-up, and runs entirely in your browser, so your conversions are instant and private.