Temperature converter: Celsius, Fahrenheit, Kelvin
Type a temperature in Celsius, Fahrenheit or Kelvin and see the instant conversion to the other scales.
What it is for
The temperature converter turns a value between Celsius, Fahrenheit and Kelvin instantly. Type the temperature in one scale and see the equivalent in the others, without having to remember the formulas.
It is handy in the kitchen when following a foreign recipe in Fahrenheit, in science studies that use Kelvin, and when checking the weather forecast in another country.
The formulas used
- Celsius to Fahrenheit: F = C x 9/5 + 32.
- Celsius to Kelvin: K = C + 273.15.
- Fahrenheit to Celsius: C = (F - 32) x 5/9.
- Kelvin to Celsius: C = K - 273.15.
When to use
- Convert an oven temperature from a recipe in Fahrenheit to Celsius.
- Work with Kelvin in physics and chemistry exercises.
- Understand a weather forecast from a country that uses another scale.
- Check a fever or room temperature across scales.
Limitations
The conversion is arithmetic and exact within the precision shown. Absolute zero sits at 0 K, equal to -273.15 degrees Celsius, so values below that have no physical meaning. All the calculation runs in your browser, with nothing sent to servers.
Frequently asked questions
- What is the Celsius to Fahrenheit formula?
- F = C x 9/5 + 32. For example, 100 degrees Celsius equals 212 degrees Fahrenheit, the boiling point of water at sea level.
- Why does Kelvin exist?
- Kelvin starts from absolute zero and is used in science. The conversion to Celsius is direct: K = C + 273.15, so 0 degrees Celsius is 273.15 K.
- Are my values sent to any server?
- No. The conversion happens entirely in your browser, without transmitting anything.