A PTO calculator applies an accrual formula to estimate earned leave. Employers may grant an annual allowance, add a set amount each pay period, or accrue PTO in proportion to hours worked. The policy determines which formula and pay schedule apply.
Annual allowance
Annual PTO allowance × completed pay periods ÷ pay periods per year. This prorates a yearly amount across the completed portion of the accrual year.
Per pay period
PTO earned per pay period × completed pay periods. A partial number of completed periods can be entered when the policy accrues continuously.
Hours worked
Hours worked × PTO accrual rate. For 1 PTO hour per 40 work hours, divide work hours by 40; the rate is not a percentage.
The estimated remaining balance is the starting PTO balance plus PTO earned during the selected period minus PTO used. A negative result remains visible so it can be reviewed rather than silently changed to zero.
To convert hours into days, the calculator divides hours by the workday length you enter. With an 8-hour workday, 8 PTO hours equal 1 workday and 4 PTO hours equal 0.5 workday. Change the workday length if your schedule uses a different number of hours.