Chelsea took all of three minutes to make their dominance pay off as Fran Kirby raced through to draw first blood, and the Blues got to half time 1-0 up despite spurning numerous opportunities to extend their lead.
Arsenal largely had the efforts of Manuela Zinsberger to thank as they kept themselves in the game, but with 57 minutes on the clock, Kerr beat Lotte Wubben-Moy all ends up before firing home into the far corner.
With one hand firmly on the crown, Chelsea made sure of the win as Kerr raced through before delightfully dinking the ball over a stranded Zinsberger to wrap up the crown in style.
Chelsea have now won the women's FA Cup for the third time following previous 2015 and 2018 triumphs, as Arsenal wait for their first crown since the 2015-16 season.
Hayes's team now prepare to resume Champions League action on Wednesday against Juventus, while Eidevall's runners-up face reigning European champions Barcelona on Thursday. body check tags ::