Business Days Calculator

About This Tool

Need to count workdays between two dates or figure out a due date that skips weekends and holidays? This Business Days Calculator helps you count, add, or subtract working days so you can plan schedules with confidence. It is designed for everyday use—whether you are tracking project timelines, shipping estimates, payroll cycles, or office deadlines—without having to count dates manually.

A business day typically means Monday through Friday, excluding weekends and company holidays. This calculator can count business days across a date range or start from a date you choose, then move forward or backward by a number of business days, skipping any non-working days you define. You can toggle Saturday and Sunday to match local schedules, and you can add a list of holidays that should be excluded. The tool uses UTC-based calculations to avoid daylight-saving surprises, but it still displays results in a friendly, readable format.

How to use it step by step

1. Choose whether to count business days between dates or add/subtract business days from a start date.
2. For count mode, enter a start date and end date, then choose whether each endpoint should count.
3. For add/subtract mode, enter the number of business days to add or subtract (use a negative number to go backward).
4. Choose which weekend days and loaded holidays count as non-working.
5. Add holidays by uploading a file or pasting dates in YYYY-MM-DD format.
6. Press Calculate to see the workday count or resulting business date.

Real-world uses include estimating delivery windows, planning contract milestones, scheduling interviews, or calculating response time targets for support teams. For example, if a client asks for a report “in five business days,” this tool can show the exact date after skipping weekends and holidays. It is also handy when coordinating teams across regions with different weekend schedules.

Your holiday list is cleaned automatically: duplicates are removed, invalid lines are ignored, and entries are sorted for consistency. All calculations happen locally in your browser for privacy, so you can safely use the tool even with internal schedules. The result is a clear, reliable business day calculation without guesswork.