Business Days Between Two Dates
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About this calculator
Calculate the number of weekdays (Monday–Friday) between two dates. Weekends are excluded from the count. This is different from a simple day count because it only counts the days when most businesses and offices are open.
How it works
Unlike other calculators that use simple division, the business days calculator walks through each day between your two dates one at a time. For each day, it checks whether it falls on a Monday through Friday (a weekday) or a Saturday/Sunday (a weekend day). Only weekdays are counted. This day-by-day iteration ensures accurate results even across months with different lengths.
When to use this calculator
Calculate shipping delivery windows (most carriers count business days, not calendar days). Determine project deadlines when work only happens on weekdays. HR departments use business day counts for probation periods, notice periods, and PTO accrual. Legal deadlines like court filing windows and regulatory response periods are often specified in business days.