Productivity

Date Difference Calculator

Find the difference between two dates in days, weeks, months, years, hours, and business days. Great for planning, deadlines, and leave periods.

Choose dates
Years
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Full years
Months
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Remaining months
Days
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Remaining days
Business days
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Mon to Fri total
Breakdown
Total days-
Total weeks-
Total hours-
Weekend days-

Date Difference Calculator: How It Works

This tool measures the duration between two dates and shows the result in several formats at once. You can use it for deadlines, bookings, notice periods, holidays, and project planning.

How the calculation works

The calculator finds the full day difference between the start date and end date, then converts that into weeks and hours. It also works out calendar years, months, and days by borrowing from previous months where needed.

Common questions

How many days are between two dates?

The tool counts the full number of days between the selected dates. If you tick the inclusive option, both boundary dates are included too.

What are business days?

Business days are weekdays from Monday to Friday. This calculator counts those days separately so you can estimate working time more easily.

Can I calculate months and years too?

Yes. The tool shows both a raw total and a calendar-style breakdown in years, months, and days.

When should I use inclusive counting?

Use inclusive counting when the start and end dates both matter, such as hotel stays, leave periods, or challenge streaks.