Vacation Days Calculator – Track and Project Your PTO Balance
"How many vacation days do I actually have?" is a question that gets harder to answer the longer you've been employed. Between an accrual rate you half-remember, days you've already booked, and a carryover cap from last year, a quick mental estimate is rarely reliable. The Vacation Days Calculator turns your accrual policy into an exact balance — as of today or any future date — so you can plan a trip, negotiate time off, or simply know where you stand.
Two Calculation Modes
Accrual Balance mode is for policies where paid time off builds up continuously over time — a common structure being 1.25 days per month, equivalent to 15 days a year. Enter your accrual start date, rate, and frequency (monthly, bi-weekly, semi-monthly, or annual), and the calculator computes exactly how many days you've earned as of your chosen calculation date. Set that date in the future to answer "will I have enough days for this trip?" before you book it.
Fixed Annual Allowance mode is for employers who grant a lump sum of days — say, 20 days — at the start of each policy year rather than accruing incrementally. This mode also handles a prorated first-year grant for employees hired mid-year, using Prorated Days = Annual Allowance × (Remaining Days ÷ 365.25), and a carryover calculation for rolling an unused balance into the new policy year.
Carryover Caps and Maximum Balance Caps
Many PTO policies cap how much unused time survives a policy-year transition. The carryover formula is New Balance = MIN(Prior Balance, Carryover Cap) + New Year Grant, with any excess reported as Forfeited Days = MAX(0, Prior Balance − Carryover Cap). Separately, a maximum balance cap acts as a hard ceiling on the total balance at any point in time — once your accrued days would exceed it, the calculator shows the excess as capped or forfeited so you can plan around a use-it-or-lose-it policy before days are lost.
Net Available Days and Hours
The headline result is your net available balance: total accrued (or granted) days, plus any starting balance, minus days already used, minus days already scheduled but not yet taken. For hourly-tracked policies, the balance is also converted to hours using your configured hours-per-workday setting, so the same calculator works whether your HR system tracks time off in days or hours.
Part-Time Proration
Part-time employees typically accrue vacation proportional to their schedule. Setting the Part-Time Percentage below 100% scales the effective accrual rate accordingly — for example, a 50% schedule at a nominal 1.25 days/month rate accrues at 0.625 days/month in the calculator's output.
12-Month Balance Projection
Accrual Balance mode includes a month-by-month projection chart showing how your balance grows over the next year, assuming accrual continues at the current rate with no further time taken. If a maximum balance cap is set, the chart marks it directly so you can see exactly when you'd start losing days if you don't use them.
Who This Calculator Is For
Employees can check their real-time balance before requesting time off. HR professionals and payroll administrators can audit PTO liability across accrual and lump-sum policies, tenure-based proration, and carryover rules without building a spreadsheet model. Freelancers and contractors who negotiate PTO-equivalent terms can track accrued time the same way a full-time employee would.
Limitations
This calculator covers the most common accrual, proration, and carryover structures, but it does not model tenure-based accrual tiers (an increased rate after N years of service) or jurisdiction- specific statutory minimums, which vary widely by country and state. For those situations, use the results here as a starting estimate and confirm against your employer's written policy or local labor law.