How Many Working Weeks Are in a Year?
The honest answer is 52 calendar weeks, about 48 after holiday and leave. See why the number depends on what you are counting and how to work out your own.
There are 52 working weeks in a year if you mean calendar weeks. If you mean weeks actually worked, most full-time employees land somewhere near 48. The gap between those two numbers is where most planning goes wrong.
The Calendar Answer: 52
A year is 52 weeks plus one day, or two in a leap year:
365 ÷ 7 = 52.14
So 52 is the count of complete weeks. Every year has 52; some have a 53rd ISO week, which happens when the year contains 53 Thursdays — [2026 is one of them](/blog/how-many-thursdays-in-a-year).
The Employment Answer: Usually 46 to 49
Start at 52 and subtract what nobody works:
| Deduction | Typical | Weeks |
|---|---|---|
| Paid annual leave | 20-25 days (UK/EU), 10-15 (US) | 2-5 |
| Public holidays | 8 (UK), 11 (US federal) | 1.6-2.2 |
| Sick leave | Varies widely | 0.5-1 |
A UK employee with 25 days leave and 8 bank holidays works about 45 weeks. A US employee with 10 days leave and 11 holidays works about 47.5. Neither is 52.
Which Number Belongs in Which Calculation
- Hourly to annual salary — use working weeks after leave only if the leave is unpaid. Paid leave still gets paid, so for salaried conversion the figure is 52.
- Project capacity planning — use weeks actually worked, or you will overcommit by roughly a month.
- Contractor day rates — use weeks actually billable, which is lower again once you account for unbilled admin.
Working Weeks and Working Days Do Not Divide Cleanly
Dividing a year's working days by five does not give a whole number of weeks. 2026 has 261 weekdays, which is 52.2 weeks. The remainder exists because the year does not contain a whole number of weeks. Anyone quoting a precise figure like "52.18 working weeks" is reporting arithmetic, not a schedule.
For a specific date range with your own holidays excluded, use the [working days calculator](/tools/working-days).