Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin in real time. Type in any one field and the other two update instantly, with the conversion formulas shown.
FreeOnline Tool
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How to Use
- Enter a value in any of the temperature fields (Celsius, Fahrenheit, or Kelvin).
- The other two units are converted and displayed automatically in real time.
- Edit any unit at any time and the rest stay in sync.
- Click Copy to grab the converted values.
Features
- Real-time conversion between Celsius, Fahrenheit, and Kelvin.
- Type in any field and the others update, with no direction to select.
- Results are shown to 2 decimal places, which suits both engineering and everyday use.
- Displays the conversion formulas so you can learn and verify them.
- Accepts negative values for very low temperatures.
Use Cases
Checking the weather while traveling
Convert a forecast given in Fahrenheit into Celsius so you immediately know how warm or cold it will be.
Cooking temperature conversion
Western recipes usually list oven temperatures in Fahrenheit, so convert them to Celsius to avoid ruining the bake.
Processing experimental data
Convert Celsius readings from an experiment into Kelvin for thermodynamic calculations or a written report.
Materials engineering reference
Industrial material specs often quote melting points or operating temperatures in Fahrenheit, so convert them to Celsius to compare against local standards.
FAQ
What is the formula between Celsius and Fahrenheit?
Fahrenheit = Celsius x 9/5 + 32, and going the other way, Celsius = (Fahrenheit - 32) x 5/9. The tool does the math for you, so there is no formula to memorize.
How do Kelvin and Celsius relate?
K = Celsius + 273.15, and Celsius = K - 273.15. Kelvin is the absolute temperature unit used in science, where 0 K is absolute zero, the theoretical lowest temperature.
What is a body temperature of 37 degrees Celsius in Fahrenheit?
37 Celsius = 37 x 9/5 + 32 = 98.6 Fahrenheit, the familiar figure for normal body temperature.
Why do some countries use Fahrenheit?
The United States and a handful of other countries still use Fahrenheit day to day, while most countries and the scientific world use Celsius, with Kelvin common in research.