Calculate working days between two dates, excluding weekends. This free online business day calculator is ideal for planning projects, holidays and work schedules.
✔ Working days calculator • ✔ Excludes weekends • ✔ UK business days • ✔ Instant results
The Working Days Calculator helps you calculate the number of business days between two dates. Unlike a standard date difference calculator, this tool excludes weekends and focuses on working days that are typically used in employment, project planning, contracts, delivery estimates, and business operations.
This calculator is particularly useful for UK businesses, employees, freelancers, students, and anyone who needs to determine how many working days exist between two dates. It provides a quick and accurate alternative to manually counting weekdays on a calendar.
The calculator counts only weekdays, which are Monday through Friday. Saturdays and Sundays are automatically excluded from the result.
For example, if there are 14 calendar days between two dates, the actual number of working days may only be 10 if two weekends occur during that period.
This method is commonly used by employers, project managers, delivery companies, and government organisations when calculating deadlines and response times.
Example 1:
Example 2:
Example 3:
Working day calculations are used in many everyday and professional situations.
Many organisations specify deadlines in working days rather than calendar days because weekends are not normally considered business operating days.
This calculator helps avoid these mistakes by automatically performing the calculations for you.
| Period | Calendar Days | Typical Working Days |
|---|---|---|
| 1 Week | 7 | 5 |
| 2 Weeks | 14 | 10 |
| 1 Month (30 days) | 30 | 21-22 |
| 3 Months | 90 | 64-66 |
| 1 Year | 365 | 260-262 |
Many contracts, service agreements, and employment policies use working days rather than calendar days. For example, a company may promise a response within 5 working days, which differs significantly from 5 calendar days if a weekend occurs during that period.
Understanding the difference can help you avoid missed deadlines, delayed projects, and misunderstandings when planning business activities.
What is a working day?
A working day is typically Monday to Friday, excluding weekends. Some organisations may also exclude public holidays.
Does this calculator include UK bank holidays?
No. This version currently excludes weekends only. Bank holiday support may be added in a future update.
Why are working days different from calendar days?
Calendar days include every day of the week, while working days exclude weekends and sometimes public holidays.
How many working days are there in a year?
A typical year contains approximately 260 to 262 working days before public holidays are deducted.
Can I use this calculator for employment notice periods?
Yes. It can help estimate notice periods, annual leave durations, project timelines, and many other business-related calculations.
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Last Updated: August 2026