Tax and salary

Hi Guys,

I got an offer from a manufacturing company at Stavanger with a base salary of 850,000 + 5-10% bonus. The company will provide relocation expenses (3 months accommodation + 50000 other expenses ). I checked the official tax calculator @ skattekalkulator.app.skatteetaten.no/#/skattesubjekt, and its showing takehome as 50K PM. However, one of my friend who worked in Norway was telling me the take home will be around 40K PM.
Is there any other tax calculator that I can use to get a more accurate amount. Secondly, my UK salary is GBP 65K. Does it make sense to move to Norway? My main criteria are salary/savings as I have a good education loan to repay.