Select 'Count Days' to find the number of business days between two dates, or 'Add Days' to find a future date by adding business days.
Pick a start date and either an end date (Count mode) or enter the number of business days to add (Add mode).
Enable 'Exclude US Federal Holidays' to skip the 10 federal holidays, or disable it to count only weekdays.
See the business day count, calendar days, weekends skipped, holidays skipped, and (in Add mode) the resulting target date.
For each day in the range, check if it falls on a weekend (Saturday or Sunday). If the holidays toggle is on, also check against the list of US federal holidays. Subtract all non-working days from the total calendar days to get the business day count. When adding N business days, iterate forward from the start date, skipping weekends and holidays, until N working days have been counted.
Business Days = Calendar Days − Weekend Days − Holidays (that fall on weekdays)
Toggle US federal holidays on for payroll and government deadline calculations — off for industries that work through holidays
When a federal holiday falls on Saturday it is observed on Friday; when it falls on Sunday it is observed on Monday
Use 'Add Business Days' mode to find exact delivery or deadline dates from a shipping or contract start date
Most months have 20-23 business days — use this calculator to get the exact count for budgeting and planning
Remember that some holidays like Memorial Day and Thanksgiving are floating (not fixed dates) — this calculator handles them automatically
For international use, toggle holidays off and manually account for your country's public holidays
Working days — also called business days — exclude weekends and public holidays, making them the standard unit for contractual deadlines, shipping estimates, project timelines, and legal notice periods. A calendar month typically contains 20-23 working days, but the exact count varies based on which day of the week the month starts, the number of days in the month, and applicable public holidays. The US federal government observes 11 public holidays per year, reducing the typical 260-261 weekdays to about 249-250 working days annually. In the European Union, the number of public holidays ranges from 9 (UK) to 16 (Slovakia), creating significant variation in annual working day counts across countries. Accurate working day calculations are critical in many contexts: financial settlements (stock trades settle in T+1 business days), legal proceedings (court filing deadlines are typically specified in business days), construction project scheduling (using the critical path method), and employment contracts (notice periods often specify business days). Common errors include miscounting by including the start date, forgetting a mid-week holiday, or applying the wrong country's holiday calendar. For international business, the challenge compounds when counterparties observe different holiday schedules.
Many contracts, legal deadlines, shipping estimates, and payroll cycles are defined in business days rather than calendar days. A '10 business day' deadline starting on a Friday actually spans 16 calendar days (two full weeks plus weekends). Add a holiday and it stretches to 17. Our working days calculator eliminates guesswork by automatically excluding weekends and US federal holidays, giving you the exact business day count or target date you need.
The calculator includes all 10 US federal holidays for both 2025 and 2026: New Year's Day, Martin Luther King Jr. Day, Presidents' Day, Memorial Day, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving, and Christmas Day. Fixed-date holidays that fall on a weekend are observed on the nearest weekday per OPM rules — Saturday holidays shift to Friday, Sunday holidays shift to Monday.
Data sourced from trusted institutions
All formulas verified against official standards.