Business Day Calculator
Count working days between two dates or add business days to a start date, skipping weekends throughout. Deadlines, shipping estimates, and SLA windows become simple arithmetic.
Using the Business Day Calculator: step by step
- Choose whether to count days between dates or add days to a date.
- Enter the start date and the end date, or the number of days to add.
- The result excludes Saturdays and Sundays from the count.
- Use the answer for planning, deadlines, or turnaround commitments.
What people use the Business Day Calculator for
- Checking whether a contractual deadline lands on a working day.
- Estimating delivery when a service quotes business-day turnarounds.
- Counting working days remaining in a month or sprint.
- Setting realistic follow-up dates in project plans.
Inside the Business Day Calculator
The calculator walks the calendar day by day and counts only Monday through Friday, so a five-business-day window starting Friday ends the following Friday, not Wednesday. The add mode answers the question of what date results after N working days elapse. Public holidays are not included, since they vary by country and region, so add a buffer when holidays fall inside your window. Everything computes locally.
Limitations worth knowing
Weekends are excluded automatically, but regional public holidays are not; verify windows that span holidays like Thanksgiving or Easter.
Business Day Calculator FAQ
Does it count holidays?
No. Only weekends are skipped; holidays differ by region, so pad critical deadlines accordingly.
Is the start date included in the count?
The count reflects days elapsed between the dates; adjust by one day if your convention differs.
Can it subtract business days?
To look backward, count the days between your earlier and later date in reverse order.
Last reviewed: October 2026.