Business day calculator — U.S. federal holidays included automatically.
Disclaimer: This is an informational tool. Observed U.S. federal holidays are included automatically. Results are for planning purposes only.
This business day calculator helps you calculate dates and deadlines using business days instead of calendar days. It operates in two modes.
Mode 1 — Add business days: Enter a start date and a number of business days to add. The calculator counts forward, skipping weekends and observed U.S. federal holidays, and returns the resulting business date.
Mode 2 — Count between dates: Enter a start date and an end date. The calculator counts how many business days fall between them, excluding weekends and observed U.S. federal holidays.
Both modes support an option to include or exclude the start date and allow custom holiday exclusions for company-specific calendars.
This example shows how the calculator adds business days while skipping weekends and observed U.S. federal holidays.
The calculator moves forward one day at a time and only counts weekdays that are not excluded:
Result: Wednesday, March 11, 2026
Business Day Result = Start Date + counted weekdays that are not observed U.S. federal holidays or custom excluded dates.
In add mode, the calculator steps forward one day at a time until the requested number of valid business days has been counted. In between-dates mode, it evaluates each date in the selected range and counts only valid business days.
This calculator applies observed U.S. federal holiday rules. All major federal public holidays are included, such as New Year's Day, Martin Luther King Jr. Day, Presidents' Day, Memorial Day, Juneteenth, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving, and Christmas.
Fixed-date holidays that fall on a weekend are shifted to the nearest weekday for observance. A Saturday holiday is typically observed on Friday, and a Sunday holiday is typically observed on Monday. This methodology helps align results with common business-day rules used by banks, payroll processors, and operations teams.
Scenario 1: A payment is sent on Friday and the receiving bank quotes one business day for processing. The next counted business day is Monday, so the expected processing date moves past the weekend.
Scenario 2: A payroll team needs to know the submit date for a Tuesday payday. Counting backward in business days helps avoid missing a weekend or holiday pause in settlement.
Scenario 3: A contract requires notice within five business days. Counting only valid business days prevents an incorrect deadline caused by including weekends.
Business-day calculations matter because many banking, payroll, and operational timelines do not run on calendar days. A calendar may show three days passing from Friday to Monday, but only one business day exists in that window.
Observed holidays also change results. When a fixed-date holiday falls on a weekend, the observed closure usually moves to Friday or Monday. That means a date that looks like a normal weekday may still be excluded from processing and deadline counts.
This is why business-day tools are used for ACH timing, payroll submission schedules, invoice due dates, and contract notice periods. The practical question is not simply how many days passed, but how many valid business days passed under the applicable rules.
A business day is Monday through Friday, excluding observed U.S. federal holidays and any custom holiday dates you enter.
No. Saturdays and Sundays are always skipped.
Yes. Enter custom holiday dates in YYYY-MM-DD format, one per line, and the calculator will exclude them from the count.
No. The calculation runs in your browser and does not require an account.