Transparent rules
See exactly which endpoints, weekends and holidays are included.
● Precise · Flexible · Browser-onlyDate, duration &
Date, duration &
business-day calculator
Count days between dates, plan deadlines and calculate working days with clear inclusion rules.
✓ No sign-up✓ Browser-based✓ Instant results
01 · Enter dates
How far apart are two dates?
Built for real planning
From quick checks to project deadlines
Use calendar-day mode for elapsed time, or apply working-day rules for delivery dates, service windows and internal planning.
End-of-month safe
Month and year calculations adjust correctly for shorter months.
Private by design
Your dates and exclusions never leave your browser.
Method, example and limitations
Understand the result before using it
Use this tool to measure elapsed calendar time, add or subtract a duration, or count working days under rules you define. Calendar days and business days answer different questions, and inclusive counting can change a deadline by one day.
What the tool does
Calendar differences are calculated from civil dates rather than assuming every day contains exactly 24 local hours. Business-day mode walks through the date range and excludes the selected weekend days plus any holiday dates you enter. Inclusion controls determine whether the start and end dates are counted.
A five-day range with one entered holiday
- Choose Monday 17 August to Friday 21 August 2026.
- Count both endpoints and exclude Saturday and Sunday.
- Enter Wednesday 19 August as a holiday: four business days remain.
How to read it: The result reflects the calendar rules supplied to the tool. It does not automatically know an employer, court, bank or jurisdiction’s holiday calendar.
- Dates are interpreted as local civil dates.
- User-entered holidays are valid for the relevant organisation and location.
- A business day is determined only by the selected weekends and holiday list.
- Mixing elapsed days with inclusive calendar dates.
- Assuming every jurisdiction observes the same public holiday.
- Using business-day output as a legal deadline without checking the governing rule.
Use current primary information for decisions affected by laws, tariffs, product specifications or professional standards.