Lægreid shot four zeros and was unbeatable for the day, as the competition's only zero shooter.
This is the first time Lægreid wins the total World Championship.
Second in the pursuit was Johannes Thingnes Bø, with three misses.
It was just Thingnes Bø that Lægreid needed to beat to secure the total. Otherwise, it would have been decided in Sunday's mass start – when Bø, the greatest biathlete of all time, ends his career. He didn't get the chance to finish on top.
The best Swedish athlete became Sebastian Samuelsson, seventh with three misses.
Viktor Brandt finished ninth, which is the first time the 25-year-old finishes top ten in a World Championship race.
I'm probably the happiest person in the stadium right now, says Brandt to SVT.
Martin Ponsiluoma finished 21st and Jesper Nelin 27th.
The men's last World Championship race of the season takes place on Sunday afternoon, when the 15-kilometer mass start awaits.
It will be the last we see of both Johannes Thingnes Bø and Tarjei Bø in the World Championship, as both brothers have announced that they will retire after the season.
