How much to charge for English classes

I have three years TEFL experience in Spain and am planning to come to Berlin.
I would like to know how much I should charge for private classes, normal hourly rates in langauge schools and also for company classes.

Have you tried using the search function? Useful keywords: rates, teacher, English classes, freelance, etc. You'll find plenty of information on the subject. Good luck!

yeah the search function is good but I haven´t found the answers for berlin specifically. I know wages and cost of living varies a lot in germany. So some replies would be appreciated.