Working days calculator
A year holds 260, 261 or 262 weekdays depending on which day it starts and whether it is a leap year — 261 in roughly two years out of three. Deduct eight or so public holidays and about 253 are left, which is close to 1,900 hours at 7.5 hours a day. A month averages 21.7 working days, and that is the figure most capacity planning runs on.
How to count working days
Available capacity is always well below the raw working-day count. Subtract annual leave, public holidays, sickness and training and a nominal 261-day year becomes nearer 200 days of actual availability per person. Planning against the calendar figure rather than the available figure is the most common reason project estimates slip without anyone doing anything wrong. The familiar 2,080-hour year in salary and contractor arithmetic is a related simplification: it is 52 weeks times 40 hours, which quietly assumes exactly 260 weekdays and no holidays whatsoever. Most years have 261 and some have 262, so an hourly rate reached by dividing a salary by 2,080 is a convention rather than a measurement — perfectly serviceable, as long as nobody mistakes it for the number of days anyone will actually work.
Questions
260, 261 or 262 weekdays before holidays, and 261 in most years. Deducting eight to ten public holidays leaves roughly 251 to 253.
Between 20 and 23, averaging 21.7. A 28-day February always has exactly 20.
About 1,900 at 7.5 hours a day after holidays, or 2,088 at 8 hours before them. The familiar 2,080 is 52 × 40 and assumes 260 weekdays.
No. The extra day can fall at a weekend. 2028 is a leap year starting on a Saturday and has 260 weekdays, one fewer than the common year before it.
Not directly. Deduct annual leave, sickness and non-project time: real availability is nearer 200 days.
No, they vary too much by region. Enter the number that applies to you.
Yes, which is the normal convention for a working-day count. If your contract counts from the following day, subtract one.