About this tool
Pick two dates and get the difference expressed in calendar years, months and days, as well as raw totals: days, weeks and approximate working days (Mondays to Fridays). Leap years and month lengths are handled exactly.
Date gaps power deadlines, contract terms, project plans, visa windows and notice periods — and off-by-one errors are everywhere because “between” is ambiguous. This calculator counts the difference exclusively (1 Jan to 2 Jan = 1 day); add a day yourself if your use case counts both endpoints.
How to use it
- Choose the start and end dates.
- Read the calendar breakdown and raw totals.
- Use the weekday count for working-day estimates (excludes weekends, not public holidays).
Frequently asked questions
Does it count the end date?
No — the difference is exclusive of the end date, matching how most date math works. Include the end day by adding 1 if needed.
How are weekdays counted?
Every Monday–Friday between the dates. Public holidays vary by country and are not subtracted.
Can I calculate a date in the past?
Yes — if the end date is earlier than the start date, the tool swaps them and reports the same magnitude.