Business Days Calculator
Calculate date and time values locally with visible assumptions and copy-ready results.
Use calendar math with the assumption visible
Use it for delivery promises, review cycles, payment terms, SLA windows, payroll periods, and any schedule where weekends should not count. The business-day count depends on your holiday list, so the page makes those exclusions visible instead of assuming a national calendar.
The calculator walks date by date, counts Monday through Friday, and removes any holiday dates you list. July 2026 has 23 weekdays before custom holiday exclusions. The July example separates ordinary weekdays from custom closed days, which is what most SLA and delivery promises actually need.
Limits and local processing
It does not know regional holidays automatically; paste the holiday dates that apply to your organization. The pasted holiday list is only processed by the local browser script. Compare the result with your company calendar when regional holidays, plant shutdowns, or half-days matter. Because the holiday list is user supplied, the same date span can model US offices, client-specific closure days, or internal blackout periods.
Frequently Asked Questions
How does the business days calculator work?
The calculator walks date by date, counts Monday through Friday, and removes any holiday dates you list. July 2026 has 23 weekdays before custom holiday exclusions.
When should I use this tool?
Use it for delivery promises, review cycles, payment terms, SLA windows, payroll periods, and any schedule where weekends should not count.
What should I watch out for?
It does not know regional holidays automatically; paste the holiday dates that apply to your organization.
Is this date tool private?
Yes. It runs entirely in your browser, so dates, schedules, and notes are not uploaded or stored.
More free browser utilities for planning, formatting, and technical cleanup.