Tips & Tricks 12 – Converting Date to a Quarter Posted on June 14, 2014October 29, 2014 by Vijay A. Verma Assuming date is in Cell A1. You want to convert it into a quarter (1, 2, 3 & 4). Jan to Mar is 1, Apr to Jun is 2, Jul to Sep is 3 and Oct to Dec is 4. =CEILING(MONTH(A1)/3,1) OR = ROUNDUP(MONTH(A1)/3,0)