Date Difference Calculator
Count the time between two dates. Pick a start and end date to see total days, weeks, and business days (Monday–Friday).
Duration
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Check it outCounting days the right way
Total days count every calendar day between your dates. Business days exclude Saturdays and Sundays — useful for delivery windows, project deadlines, and payment terms like “net 30.” Note that public holidays aren't removed, so subtract any that fall in your range for an exact working-day count.
How it’s calculated
Days = end − start. Business days count weekdays (Mon–Fri) only; public holidays are not excluded.
Results update as you type and are estimates, not professional advice — verify important decisions with a qualified professional.
Worked example
From today to 30 days out is 30 days, about 4.3 weeks, and roughly 22 business days.
Common mistakes
- Expecting holidays to be excluded from business days.
- Forgetting whether the end date is inclusive.
Where it is used
- Counting days to a deadline or due date.
- Working out a net-30 payment window.
Frequently asked questions
Are holidays excluded?
No — business days here mean weekdays only. Subtract any public holidays in your range manually.
Is the end date included?
The count is the span between the two dates. Add one day if you need the range to be inclusive of both ends.
Can I go backwards in time?
Yes — the result uses the absolute difference, so order doesn't matter.
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