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Vacation schedule balance calculator

Enter the number of employees on vacation for each month of the year from your vacation schedule. The calculator computes the total employee-months of vacation, the monthly average, and how much the busiest month exceeds the average.

Employees on vacation by month

Month On vacation Remove row
1
2
3
4
5
6
7
8
9
10
11
12

Result

Peak over average

Total employee-months for the year
Average per month
Busiest month

Your inputs are stored in this browser, so everything is still here next time. Nothing is sent to a server.

This calculation is for informational purposes only and does not replace advice from a qualified professional. Formulas and rates may not fit your exact situation — double-check the figures before making decisions.

How it is calculated

Average per month = the sum of employees on vacation across all months ÷ the number of months entered. Busiest month is the largest value entered.

Peak over average = (busiest month − average) ÷ average × 100 — the higher this number, the more uneven the schedule, and the higher the understaffing risk in that peak month (usually summer or the New Year holidays).

The calculator doesn't check who specifically is away — only the total simultaneously absent. If employees with unique skills happen to leave together in the peak month, the real business risk is higher than the raw number shows.

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