How do you convert Celsius to fahrenheit?

Question

like if something was 20 degrees celsuis what would it be in fahrenheit?

Answer 1

The 9/5 method always seemed awkward to me and I could never remember whether it should be 5/9 or 9/5. Besides, people suck at multiplying (let alone dividing) by 9.

The formula that I use when I have a calculator is

F = 1.8*C + 32

But here's a method that you can do in your head.

Take the temperature in C and double it

Subtract 10% of that answer

Add 32

Example:

20*2=40

40-4=36

36+32=68

Answer 2

C * (9/5) + 32 = F

Answer 3

Take the number of degrees Celsius, multiply by 9, divide by 5, then add 32.

20 C = 68 F

Answer 4

The 9/5 and 5/9 method is the long method. 9/5 = 1.8...use this instead as follows...

(°C x 1.8) + 32 = °F.

(20°C x 1.8) + 32 = 36 + 32 = 68°F.

Boiling water: (100°C x 1.8) + 32 = 180 + 32 = 212°F.

Freezing water: (0°C x 1.8) + 32 = 0 + 32 = 32 °F.

(In reverse: (°F - 32) / 1.8 = °C. (212°F - 32) / 1.8 = 180 / 1.8 = 100°C)