Days between dates calculator
Count the days, weeks and business days between two dates, or add and subtract days from a date to find a deadline.
Fix the highlighted fields to see your result.
- Weeks
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- Business days (Mon–Fri)
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How it is calculated
Dates are converted to calendar days and subtracted. Business days count each Monday through Friday from the start date (included) to the end date (excluded). Calculations use the Gregorian calendar and ignore daylight saving time.
Assumptions and limitations
- Public holidays are not subtracted.
- For legal or tax deadlines, confirm how the relevant authority counts days.
This tool is educational and provides estimates. It is not a credit offer or financial advice. Actual terms are set by each institution.
Frequently asked questions
How do I count the days between two dates?
Subtract the earlier date from the later one. The result does not count the start date; if you want to include both ends, add one day.
How are business days counted?
Business days are Monday through Friday. This calculator does not subtract public holidays, which vary by country and state.
How do I find a date 90 days from today?
Use the second section: enter today’s date and 90 days. Use a negative number to go back in time.