Date Calculator

Date calculation made easy

This date calculator offers two useful modes. "Days between dates" tells you exactly how many days — including weekends — separate any two dates. It also shows weeks, months, and working days (Monday through Friday). "Add/subtract days" lets you find a future or past date by adding or subtracting a specific number of days.

Date calculations are essential for project planning, contract deadlines, billing cycles, travel planning, and counting down to events. The calculator accounts for leap years and varying month lengths automatically.

Working days vs calendar days

When calculating business deadlines, remember that "working days" typically excludes weekends (Saturday and Sunday) and sometimes holidays. This calculator shows both total days and working days so you can plan accordingly. For legal contracts, always clarify whether deadlines are in calendar days or business days.