American people tend to use Fahrenheits in online recipes. Our owen,
however, uses degrees of Celsius. So my wife often asks me to convert
these units QUICKLY. And as you may know the units(1) does not include
this particular conversion.
So I put this text to my .zshrc:
# most common units conversions:
ftoc() {echo "($1 - 32)*5/9"|bc -l} # Fahrenheit to Celsius
ctof() {echo "$1 *9/5 +32"|bc -l} # Celsius to Fahrenheit
