Find the exact duration between any two dates in multiple time units.
Quick Answer:Select your start and end dates below to instantly see the difference in days, weeks, months, years, business days, and more.
Total Days
Calculating... days
Years, Months, Days
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Broken down
Total Weeks
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Business Days
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Weekdays only (Mon-Fri)
Total Hours / Minutes
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When calculating date differences for legal, financial, or contractual purposes, always clarify whether the count is inclusive or exclusive of the start and end dates. Many legal deadlines use "calendar days" (including weekends) while business contexts often require "business days" (excluding weekends and holidays). The convention varies by jurisdiction and context, so when in doubt, specify your counting method explicitly.
The number of days between two dates is calculated by converting both dates to milliseconds since January 1, 1970 (Unix epoch), subtracting the earlier date from the later date, and dividing the result by 86,400,000 (the number of milliseconds in one day). This method accounts for leap years and varying month lengths automatically.
Business days (also called working days) are weekdays from Monday through Friday, excluding Saturday and Sunday. To calculate business days between two dates, count each day in the range and exclude weekends. This calculator does not account for public holidays, which vary by country and region.
Yes. By default, the calculation counts the days between two dates exclusive of the end date (e.g., Jan 1 to Jan 3 = 2 days). When you check "Include End Date," it adds one additional day to the total (e.g., Jan 1 to Jan 3 = 3 days). This is useful when counting both the start and end dates, such as for event durations or rental periods.