To convert 65 degrees Celsius to Fahrenheit, you must first multiply 65 by 9, divide the product by 5, and then add 32, which gives a total of 149 degrees Fahrenheit. The equation is complicated because the Celsius and Fahrenheit scales go up and down at different rates, plus they start at different numbers. You need a calculator or a pen and paper to complete the calculations, and the process shouldn't take you more than 5 minutes.
- Multiply by nine
The first step is to multiply the Celsius temperature by 9. In this equation, you multiply 65 by 9, resulting in 585.
- Divide by five
Next, you divide the answer you got in the previous step by 5. Therefore, divide 585 by 5, which gives you 117.
- Add 32
Because Fahrenheit sets the freezing point at 32 and Celsius sets it at 0, you must add 32 to the answer from the previous equation. 117 plus 32 gives you 149, which completes the equation. That is, 65 degrees Celsius is equal to 149 degrees Fahrenheit.
- Reverse the process to convert from Fahrenheit to Celsius
To convert from Fahrenheit to Celsius, begin by subtracting 32. If you start with 72 degrees Fahrenheit, you have 40. Next, multiply that answer by 5, resulting in 200. Finally, divide by 9. 200 divided by 9 equals 22, so 72 degrees Fahrenheit is equal to 22 degrees Celsius.