Global Days Calculator

Calculate the exact number of days between any two dates. Get a detailed breakdown of business days, weekend days, weeks, months, and more.

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Full Date Breakdown

Get calendar days, business days, weekend days, weeks, months, years, and hours between your selected dates.

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Business Day Count

Instantly see how many weekdays fall between your dates. Perfect for project planning, deadlines, and work schedules.

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100% Private

All calculations run in your browser. No data is sent to any server. Your dates remain completely private.

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Frequently Asked Questions

How do I calculate the number of days between two dates?
Enter a start date and an end date using the date pickers above, then click "Calculate Days." The calculator instantly shows the total number of calendar days between the two dates along with a full breakdown of business days, weekend days, weeks, months, and hours.
Does this calculator include or exclude the end date?
By default, the calculator counts from the start date up to but not including the end date (for example, January 1 to January 2 = 1 day). If you check the "Include end date" option, it adds one extra day to the total, which is useful for counting inclusive date ranges like rental periods or event durations.
How are business days calculated?
Business days count only Monday through Friday, excluding Saturday and Sunday. Public holidays are not factored in since they vary by country and region. The calculator shows both total calendar days and business days so you can plan work schedules and deadlines accurately.
Can I calculate days between past and future dates?
Yes. The calculator works with any combination of past, present, and future dates. If the start date is after the end date, the calculator automatically swaps them and shows the absolute number of days. This makes it easy to calculate how long ago an event occurred or how many days until a future deadline.
Does this calculator handle leap years?
Yes. The calculator uses native JavaScript date arithmetic that correctly accounts for leap years, varying month lengths (28, 29, 30, or 31 days), and all calendar edge cases. You can rely on it for accurate results across any date range.