70 degrees Fahrenheit is equivalent to 21.1 degrees Celsius. For a rough conversion from Fahrenheit to Celsius, 32 should be subtracted from 70 or the number in Fahrenheit, then the answer should be multiplied by 5 before being divided by 9.
Celsius, which is also known as Centigrade, was named after Anders Celsius. The freezing point of water is 0 degrees Celsius while its boiling point is 100 degrees Celsius. Fahrenheit was named after Daniel Gabriel Fahrenheit. The freezing point of water is 32 degrees Fahrenheit while its boiling point is 212 degrees Fahrenheit. Though the metric system is widely used by many countries, the United States still uses Fahrenheit for temperature readings.