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Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin.

How to use the Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin. Fill in the fields above and the result updates instantly, together with the formula behind it.

Formula

°F = °C × 9/5 + 32; K = °C + 273.15

Worked example

25°C = 77°F = 298.15 K. 0°C is the freezing point of water at standard pressure.

Important things to know

Kelvin is an absolute scale. Temperatures below 0 K are invalid.

Frequently asked questions

How is the Temperature Converter calculated?

°F = °C × 9/5 + 32; K = °C + 273.15. Example: 25°C = 77°F = 298.15 K. 0°C is the freezing point of water at standard pressure.

What do I need to enter in the Temperature Converter?

You enter: Temperature; From; To. An example value is shown in each empty field, and the result appears as soon as the numbers are valid.

What is absolute zero in Celsius and Fahrenheit?

Absolute zero is 0 K, which equals −273.15 °C or −459.67 °F. Temperatures below it are not physically possible.

Can I save or share this calculation?

Yes. Use Copy to copy the result or full example. Share creates a link that puts your chosen values into the URL fragment so another person can reproduce the calculation. Your named saves and recent history stay in your own browser.

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