about 40-45 hours, depends on what i have to do. if i can get my work done during four days á 9 hours, that means i can go home five hours earlier on friday. usually i will do about an extra hour per week, because i have to be set on eight hours per week, which means i can get extra days on top of vacation.
i know countries that do experiments with 30-35 hour weeks, I know a production facility in sweden for toyota has 30 hour weeks for everyone. they did a study and found that workers were more productive than ever because of the reduced amount of hours that they had to do. with the covid pandemic and the recent surge of homeoffice, there will be discussions made about having reduced hours of work and more work from home, which is where jobs are trending these days.