Fahrenheit to Celsius, fast

If you’re wanting to convert Fahrenheit to Celsius, the real formula looks like this:

(°F — 32) / 1.8 = °C

Or going from Celsius to Fahrenheit:

(°C * 1.8) + 32 = °F

That’s accurate, but hard to do in your head. Here are two quick ways to do it instead; just memorize a few numbers (from whichever method you prefer) and you’re all set.