How to use the calculator Log into your Online Center. Open your most recent paystub. Enter the data below! Calculate your vacation time You must have JavaScript enabled to use this form. Hours Earned Found on the "+Earned" row of the "Vacation" column. Hours Balance Found on the "End Balance" row of the "Vacation" column. This is the balance of your most recent pay check and likely does not reflect any time submitted on your most recent time sheet. Results Results Total 80 This is the total number of hours (including 10 day automatic carryover) you can have in your vacation bank on December 31 without losing vacation time. Results Balance -80 This is the amount of hours you need to use by December 31 of this calendar year. If this number is negative, you are not in a position where you will lose time.