I have a base formula that calculates the beginning and expiration date including the effective date of the change (insurance related). It spits out a prorata figure simplified to 3 digits, but it's really however many decimals it takes to calc. I'm hoping to use the ROUND functiion inserted into the current formula to simplify it if possible to point (.000) decimal places. Just not sure how to incorporate. Thanks in advance! Formula is as follows: =IF(E20=0;1;IF(((D20-A20)/365)>1;1;(D20-A20)/365)). How can I take the result of the current formula to have a rounded 0.123 result?