This might be a bit heavy for you but will be helpful should you decide to take up freelance "full time" - http://www.microbusinesshub.co.uk/freelance-rates-cal

This might be a bit heavy for you but will be helpful should you decide to take up freelance "full time" - http://www.microbusinesshub.co.uk/freelance-rates-calculator/ http://www.microbusinesshub.co.uk/freelance-rates-calculator...