Hourly rate converter
"Is a 15k monthly salary really worth it?" — convert it to an hourly rate and see; working overtime or not makes a big difference.
Basis
Monthly by default 21.75 working days ((365 − 104 rest days − 11 public holidays)/12) at 8 hours a day. If you work 10 hours, change "hours per day" to 10 and the hourly rate drops at once — that's where this conversion is most useful.