Celsius to Fahrenheit Converter

How the Celsius to Fahrenheit Converter Works

Celsius and Fahrenheit measure the same thing on different scales. Water freezes at 0 °C / 32 °F and boils at 100 °C / 212 °F, so there are 180 Fahrenheit degrees for every 100 Celsius degrees — a ratio of 9 to 5. To convert Celsius to Fahrenheit you multiply by 9/5 and add 32; to go back you subtract 32 and multiply by 5/9.

Enter a temperature and choose its unit, and the converter shows it in Celsius, Fahrenheit and Kelvin at once. Kelvin is the absolute scale used in science: it has the same degree size as Celsius but starts at absolute zero, so kelvin equals Celsius plus 273.15.

°F = °C × 9/5 + 32   °C = (°F − 32) × 5/9