-40°F and -40°C are the same temperature. To convert Fahrenheit to Celsius, subtract 32, divide by 9, and multiply by 5. Fahrenheit was suggested by Daniel Gabriel Fahrenheit in 1724, while Celsius was invented by Anders Celsius in 1742. The Fahrenheit scale is only used in the US and some English-speaking countries.
Fahrenheit and Celsius temperatures are exactly the same at only -40 degrees. That is, -40°F and -40°C are the same temperature. To convert Fahrenheit to Celsius, take the Fahrenheit temperature, subtract 32, then divide that number by 9 and multiply the result by 5. So, (1) -40 – 32 = -72; (2) -72 / 9 = -8; and (3) -8 x 5 = -40.
Other temperature data:
The Fahrenheit temperature scale was suggested by a physicist named Daniel Gabriel Fahrenheit in 1724, after whom the scale is named.
The Celsius temperature scale came several years later in 1742 when a Swedish astronomer named Anders Celsius first invented it. His version was the reverse of the scale as we know it today: 0 degrees Celsius was the boiling point and 100 degrees was the freezing point. In 1744, a Carolus Linnaeus, a botanist in Sweden reversed it.
The Fahrenheit scale is now only used in the United States, Belize and some other English-speaking countries – all other countries have converted to Celsius. Even in the United States, Celsius is the primary temperature scale used in scientific fields.
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