Temperature Converter — Free Online Tool
Convert between Celsius, Fahrenheit and Kelvin using proper formulas in real time.
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About Temperature Converter
The Temperature Converter changes readings between Celsius, Fahrenheit, and Kelvin using the proper formulas rather than simple multipliers, since temperature scales have different zero points. Type a value and the converted temperature appears instantly, with the formula shown so you understand each result.
Temperature conversions come up in cooking and baking, weather, travel between countries, lab work, and science class. Everything is calculated in your browser, so you get accurate, private results the moment you type without any data leaving your device.
How to Use Temperature Converter
- Enter the temperature you want to convert in the Value field.
- Choose the source scale, such as Celsius, in the From dropdown.
- Choose the target scale, such as Fahrenheit, in the To dropdown.
- View the converted temperature instantly and copy it if needed.
Key Features
Convert between Celsius, Fahrenheit and Kelvin
Uses accurate formulas, not flawed linear factors
Live results that update as you type
Swap button to reverse the conversion direction
Runs fully in your browser for privacy
Copy the converted value with one click
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 and add 32. For example, 25°C equals 77°F. To reverse it, subtract 32 then multiply by 5/9.
What is 0 Kelvin in Celsius?
Zero Kelvin, known as absolute zero, equals -273.15°C. It is the lowest possible temperature, where molecular motion theoretically stops.
At what temperature do Celsius and Fahrenheit meet?
Celsius and Fahrenheit read the same value at -40 degrees. That is, -40°C equals -40°F exactly.
What is normal body temperature in Celsius and Fahrenheit?
Average normal body temperature is about 37°C, which equals 98.6°F, though it can vary slightly from person to person.