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Date Difference Calculator
Calculate the exact number of days, weeks, months, years and business days between any two dates.
Date Difference Calculator
About Date Difference Calculation
The date difference calculator computes the exact number of days,
weeks, months, years, and business days between two calendar
dates. It's useful for project planning, invoicing, deadline
tracking, and age-related calculations.
Total Days
Exact number of calendar days between the two dates.
Business Days
Weekdays only (Monday–Friday), excluding weekends.
Weeks & Months
Approximate duration in weeks and months.
Years
Approximate duration in years (365 days each).
How to Use This Converter
- Enter the value you want to convert.
- Choose the From unit.
- Choose the To unit.
- Click Convert to see the result instantly.
Frequently Asked Questions
How do I calculate the number of days between two dates?+
Enter both dates in the Start date and End date fields, then click Calculate. The tool returns total days, weeks, months, years, and business days.
Do business days include weekends?+
No. Business days exclude Saturdays and Sundays. Public holidays are not excluded.
How many days are in a leap year?+
366 days — one extra day compared to a common year (365 days). Leap years occur every 4 years.
How do I count weeks between two dates?+
Divide the total days by 7 and round down. Example: 100 days ≈ 14 weeks.
Does the tool handle dates in any order?+
Yes. The tool swaps start and end dates automatically so the difference is always positive.
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