📅

Date Difference

Calculate the exact difference between two dates in days, weeks, months and years.

Select two dates to see the difference.

How it works

1
Pick two dates
Use the date pickers to set the start and end dates, or choose a quick preset like 'Last 7 days', 'Last month' or 'This year'.
2
See the full breakdown
The difference is shown simultaneously in years, months, weeks, days, hours, minutes and seconds for complete flexibility.
3
Business days mode
Toggle the 'Business days only' option to exclude weekends from the count — useful for project timelines, deadlines and SLA calculations.
4
100% local
All date arithmetic runs in your browser using standard JavaScript Date objects. Your data never leaves your device.

Frequently Asked Questions

Is the Date Difference tool free?

Yes, completely free. No account needed.

Is my data sent to a server?

No. All date arithmetic uses JavaScript's Date object in your browser — nothing is transmitted.

Can I calculate business days only?

Yes. Toggle 'Business days only' to exclude weekends from the count — useful for deadlines and SLA calculations.

What output formats are shown?

The result is shown simultaneously in years, months, weeks, days, hours, minutes and seconds.