Business Days Calculator
Calculate a date by adding or subtracting business days, or count the number of business days between two dates.
Reviewed by the ToolNestr Editorial Team — July 2026
Business days vs calendar days
Project Manager
Calculate project timelines by adding business days to start dates. Estimate delivery dates accounting for weekdays only.
Contract Administrator
Determine contract deadlines and response periods that are specified in business days. Ensure compliance with contractual timelines.
HR Manager
Calculate notice periods, leave accrual, and onboarding timelines using business days. Standardize HR processes around the work week.
Sales Rep
Track follow-up schedules and quote expiration dates. Know exactly which business day a prospect will hear back from you.
Business days per year by country
| Country | Typical Business Days | Weekend | Notes |
|---|---|---|---|
| United States | 260-262 | Sat-Sun | 10 federal holidays vary by year |
| United Kingdom | 260-262 | Sat-Sun | 8 bank holidays |
| France | 260-262 | Sat-Sun | 11 public holidays |
| Germany | 260-262 | Sat-Sun | 9-13 holidays by state |
| India | 260-262 | Sat-Sun | 3 national holidays, many state |
| Japan | 260-262 | Sat-Sun | 16 national holidays |
| UAE | 260-262 | Sat-Sun | Friday half-day in some sectors |
| Saudi Arabia | ~260 | Fri-Sat | Thursday used to be weekend |
How business day calculation works
Business day calculation counts only weekdays (Monday through Friday) while skipping weekends (Saturday and Sunday). When adding business days to a start date, each calendar day is checked: if it is a weekday, it counts toward the total; if it is a weekend, it is skipped. Optional holidays can be excluded for more precise results.
Worked example
How to use the business days calculator
Choose a mode
Select "Add / Subtract" to find a future date, or "Count Between" to count business days.
Enter dates and days
Fill in the start date and either business days to add or the end date for counting.
Get your results
See the resulting date or the business day count, calendar days, weekends, and percentages.
Business day tips
Watch out for holiday weeks
Weeks with public holidays have fewer business days. Christmas week, for example, often has only 3-4 business days. Plan accordingly for deadlines.
Add buffer for critical deadlines
If a deadline is specified in business days, add an extra day or two as buffer. Unexpected holidays or company-wide closures can shift timelines.
International business days vary
The weekend is Friday-Saturday in many Middle Eastern countries. When working with international partners, confirm which days constitute their business week.
What are business days?
Business days are the days of the week when most commercial enterprises operate. In most Western countries, business days are Monday through Friday, excluding weekends. The concept is fundamental in finance, contract law, logistics, and project management where deadlines are specified in business days rather than calendar days.
Excluding holidays vs weekends
This calculator excludes weekends only. For full accuracy, public holidays should also be excluded. Holiday calendars are country-specific and region-specific. In the US, federal holidays like Christmas, Thanksgiving, and Independence Day reduce the business day count for many industries.
Business day counting conventions
Financial markets use conventions like T+2 (trade date plus 2 business days for settlement). Contract law often specifies "business days" to exclude weekends and public holidays. Some agreements use "clear business days" which exclude both the start and end dates. Always verify the specific convention used in your contract or jurisdiction.
When to use the business days calculator
Business day calculations serve critical functions across numerous professional fields. Project managers rely on them to estimate realistic delivery dates by adding working days to project start dates while excluding weekends. For instance, a software development sprint beginning on a Wednesday with 15 business days of work completes 21 calendar days later, accounting for two full weekends. In contract law, notice periods, response windows, and fulfillment deadlines are frequently expressed in business days. A service agreement specifying a 30-business-day response period gives the responding party approximately six calendar weeks, explicitly excluding weekends from the count. Human resources departments use business day calculations for resignation notice periods, probation review timelines, and leave accrual. A standard two-week notice period equals 10 business days, meaning an employee who submits resignation on a Monday works their final day on Friday of the following week. Financial professionals depend on business day conventions for trade settlement periods, bond coupon payments, and option expiration dates. The industry-standard T+2 settlement means a trade executed on Tuesday settles on Thursday, provided no market holidays fall between. Logistics and e-commerce companies advertise delivery windows in business days, where a 3-to-5 business day shipping estimate accounts for carrier non-operation on weekends. Understanding these applications helps users choose the correct calculation mode and interpret results appropriately in their specific context.
Limitations and considerations
While the business days calculator provides accurate weekday counting, several important limitations warrant attention. The calculator does not account for public holidays, which vary by country, region, and locality. In the United States, 10 federal holidays reduce the annual business day count, but states also observe unique holidays such as Patriots Day in Massachusetts or Casimir Pulaski Day in Illinois. International users face even greater variation, as holiday calendars differ dramatically across countries. The definition of the business week itself varies globally. Most Western countries observe Saturday-Sunday weekends, but many Middle Eastern nations including Saudi Arabia and the United Arab Emirates use Friday-Saturday as the weekend. Some countries historically maintained Thursday-Friday weekends, and others employ a six-day workweek with only Friday off. Partial business days present another challenge; a deadline specified for noon on a business day requires hourly precision that a whole-day calculator cannot provide. Company-specific closures such as inventory audits, team offsites, or industry holidays like bank holidays are not included. Certain legal jurisdictions use "clear business days" conventions that exclude both the start and end dates from the count, a nuance this calculator does not implement. For critical deadlines involving legal or financial consequences, users should verify business day calculations against applicable jurisdiction rules, holiday calendars, and the specific wording of any governing agreement.
Frequently asked questions
What are business days?
Business days are weekdays (Monday through Friday), excluding weekends (Saturday and Sunday). They are the days when most businesses operate and stock markets are open.
How many business days are in a year?
There are typically 260-262 business days per year (52 weeks × 5 weekdays = 260, but some years have 261 or 262 depending on the starting day).
Does this calculator exclude holidays?
No, this calculator only excludes Saturdays and Sundays. Public holidays vary by country and region and are not factored in. For holiday-adjusted calculations, you would need a holiday calendar for your specific location.
What is the difference between calendar days and business days?
Calendar days include all days of the week (including weekends and holidays). Business days only include Monday through Friday. For example, 5 calendar days could be just 3 business days if a weekend falls in between.
How do I count business days between two dates?
Count each day from Monday to Friday between the two dates (excluding the start date, including the end date). Weekends are skipped. Our calculator does this automatically.
What day is 10 business days from today?
10 business days from today is approximately 2 calendar weeks later (14 days), since 10 weekdays span 2 weeks. Use the calculator to get the exact date.
Do business days include the start date?
When adding or subtracting, the calculation begins from the start date. When counting between dates, the start date is typically excluded and the end date is included.
What are business day counting conventions?
Common conventions include: following weekends only (US, UK standard), following weekends + local holidays, and net settlement days used in finance (T+2, T+3).
Why are business days important in finance?
Stock markets only operate on business days. Settlement periods (like T+2), option expirations, and dividend dates are all calculated using business days.
Can I have fractional business days?
Business days are typically counted as whole days. For fractional calculations (like half a business day), you would need to calculate hours within a business day context.