Still surprises me to see people asking for net figures here. In every country I have lived in, inside and outside EU, net pay always depended on if you were married or not, how many children you had, owned property or not, had private healthinsurance or not etc etc.
Take the gross pay quoted by companies or people here on pprune and then find an online tax calculator for the country in question and put in all your details to get estimated net pay. In most cases you can take that net pay and deduct a couple of % if you get a tax advisor to do some deductions for various costs over the year as well.