Eighty degrees Fahrenheit is equal to 26.67 degrees Celsius. There is a simple formula for converting Fahrenheit to Celsius. Thirty-two is subtracted from the degrees Fahrenheit, and the result is then divided by 1.8.
The United States, Cayman Islands and Belize are the only countries that use Fahrenheit as their official temperature scale. All other countries use Celsius. The Fahrenheit scale was developed in 1724 by Daniel Gabriel Fahrenheit, a German physicist. In 1742, a Swedish astronomer named Anders Celsius created the Celsius scale. This scale was also referred to as the centigrade scale. It was officially termed the Celsius scale in 1948 to avoid confusion.