To convert:
- from Celsius to Fahrenheit: first, multiply by (180/100), then, add 32;
- from Fahrenheit to Celsius: first, subtract 32, then, multiply by (100/180).
(180/100) can be simplified to (9/5), and (100/180) can be simplified to (5/9), so we get this:
- °C to °F: Divide by 5, then multiply by 9, then add 32;
- °F to °C: Subtract 32, then multiply by 5, then divide by 9.
Example:
- (50°F - 32) x (5/9) = 10°C
- (30°C x 1.8) + 32 = 86°F