4-5 hours continuous screen-on use, 1 busy day, 2 days moderate use, or 5 days standby in the same place in good 4G network coverage - is what I get with built-in apps and default settings.
Battery time is reduced when the phone is moving or in poor coverage, and social apps, sports-trackers and other apps running continuously in the background drains the phone faster.
Settings > Battery has information and statistics. Please scroll and carefully read all on the first page before going into the advanced battery info.
It's difficult to advise without knowing which third-party apps is installed and how your phone is set up.