Date Difference Calculator
Days between two dates, including business days and weeks. Find the number of days, weeks, months and years between any two dates. Includes business-day count excluding weekends. Free date duration calculator.
About the Date Difference Calculator
Project deadlines, contract periods, pregnancy weeks, holiday countdowns — everything starts with "how long between these two dates?". Enter a start and end date to get the exact duration broken into years, months and days, plus totals in weeks and days, a business-day count that excludes weekends, and a plain summary sentence you can quote directly. Leap years and month lengths are handled precisely, not estimated.
How to use the Date Difference Calculator
- Select the start date.
- Select the end date.
- Read the duration breakdown and totals.
- Use the business-day figure for work planning.
Key features
- Exact years, months and days breakdown
- Total days and weeks between dates
- Business days (weekday-only) count
- Works with dates centuries apart
Is the end date included in the count?
What counts as a business day?
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