Date Difference Calculator
Find the difference between two dates in days, weeks, and more.
Select a start and end date to calculate the difference.
About this tool
Measure the span between two calendar dates for project planning, billing periods, and personal timelines. Optionally count business days.
How to use
- Pick start and end dates.
- Toggle business-day counting if needed.
- Review the difference breakdown.
Examples
- Days until a product launch.
- Billing cycle length.
- Business days between invoices.
Benefits
- Multiple unit breakdowns
- Optional business days
- Clear absolute difference
- Mobile-ready inputs
Frequently asked questions
Are both dates inclusive?+
The day count is the absolute difference between the two calendar dates (end − start in days).
What counts as a business day?+
Monday through Friday. Holidays are not excluded in this version.
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