How do I convert Celsius to Fahrenheit?

Multiply the Celsius value by 9/5 and add 32. For example, 25°C × 9/5 + 32 = 77°F. Our converter does this calculation instantly for you.

What is absolute zero?

Absolute zero is 0 Kelvin (-273.15°C or -459.67°F). It is the lowest theoretically possible temperature where all molecular motion ceases.

Why do Celsius and Fahrenheit meet at -40°?

At -40 degrees, both scales give the same reading. This is the mathematical intersection point of the two linear conversion formulas.

Is this converter accurate?

Yes, our converter uses the exact mathematical formulas for temperature conversion with no rounding until the final display.

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Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin instantly.

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About Temperature Conversion

Temperature scales: Celsius is used worldwide, Fahrenheit in the US, and Kelvin in science. Water freezes at 0°C / 32°F / 273.15K and boils at 100°C / 212°F / 373.15K.