Save your sanity, don't bother learning the conversion factors. Did you know that most of us don't even know how to convert between our own units? I invite you to go around and ask 'how many pints are in a gallon?'.

It took me an embarrassingly long amount of time to realize that there are four quarts in a gallon...

I have no such trouble with any SI unit. So with that, I will leave you with this!

"For of all sad words of tongue or pen, the saddest are these: 'The French were right again!'"