first fixie, first project. (stabilisers not inc.)

Ah right ok is there any kind of on line calculator to help guide me ?

As I don't want to be spinning to be honest I would rather a faster gear even if it did kill my legs to get going

This is why I said learn to spin.

I'm quicker on 48x19 than I ever was on 53x18.

Pushing a big gear will brutally murder your knees and in many cases do irreversible damage, spinning is better all round you just need to bare with with and get used to it.