Instantly find the difference between any two dates broken down into years, months, and days — plus totals in weeks and hours. Optional checkboxes let you include the end day or count only weekdays.
Select a start date and an end date using the date pickers. The tool defaults to today and 30 days from now so you can see results immediately.
Optionally check 'Include end day' if you want the final date counted as a full day (useful for age or billing calculations).
Enable 'Show weekday count' to see the number of working days (Monday–Friday) within the selected range.
What is Date Difference Calculator?
Enter a start date and an end date and the calculator immediately shows the calendar-accurate breakdown: full years, remaining months, and leftover days. This matches how humans naturally describe a duration — for example '2 years, 3 months, 15 days' rather than a raw day count.
The total counts section gives you the span expressed as a flat number of days, decimal weeks, and hours. These are useful for billing periods, project timelines, or scheduling deadlines where you need a single number rather than a mixed breakdown.
Check 'Include end day' to count the end date itself as part of the span — useful when calculating age or billing that ends on a specific date. Enable 'Show weekday count' to see how many Monday-through-Friday workdays fall within the range, automatically excluding Saturdays and Sundays.
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FAQ
What happens if the end date is before the start date?
The calculator automatically swaps the two dates so it always computes a positive duration, regardless of which date you enter first.
Does the weekday count exclude public holidays?
No — the weekday count only excludes Saturdays and Sundays. Public holidays vary by country and year, so you would need to subtract them manually based on your locale.
Why does the year/month/day breakdown differ from just dividing total days?
Calendar months have different lengths (28–31 days), so dividing total days by 30 gives an approximation, not an exact answer. This calculator uses calendar arithmetic to give the precise years, months, and days.
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