Not sure if you knew this but you can do conversions straight from the google search bar.
For example you can type “20 degrees c in f” and it returns “20 degrees Celsius = 68 degrees Fahrenheit”
Not only does it do units but it also does currency – “20 usd in nzd” returns “20 U.S. dollars = 26.3331139 New Zealand dollars”
Very handy and saves having to find online conversion sites like I used to.
Just buy a Mac mate. They have these handy little widgets only a mouse button away at any time….