Take the degrees in Celsius to be converted and multiply by nine. In this example: 170 x 9 = 1530.
Take the result from the first step and divide by five. In this case: 1530/5 = 306.
Add 32 to the quotient to get the final answer. Continuing with this example: 306 + 32 = 338. Thus, 170 degrees Celsius is equal to 338 degrees Fahrenheit.