What is a Days Between Dates Calculator?
A Days Between Dates Calculator helps you determine the amount of time between two calendar dates. Depending on the context, you may want to know the raw total number of days, only weekdays, or a more natural calendar difference in years, months, and days.
This can be useful for deadlines, project durations, subscriptions, event planning, age-related calculations, and legal or administrative paperwork.
How the calculation works
This tool compares the selected start date and end date. It calculates the raw day difference, optionally includes the end date if you choose that option, and also counts weekdays from Monday to Friday.
The calendar difference is shown separately because “1 month” is not always the same number of days.
Why weekdays can be useful
In many real-world situations, business days matter more than raw calendar days. For example, project planning, invoices, contracts, and work schedules often focus on weekdays rather than weekends.
That is why this calculator also shows a “weekdays only” result.
How to use this calculator
- Select a start date.
- Select an end date.
- Choose whether to include the end date.
- Review the results for total days, weekdays, weeks, approximate months, and calendar difference.
This tool is designed to be fast, simple, and easy to use on desktop or mobile devices.
Frequently asked questions
Why is the calendar difference different from total days?
Calendar months have different lengths, so a result like “1 month, 2 days” does not always correspond to the same number of total days.
What does “Include end date” mean?
When enabled, the calculator counts the end date as part of the range. This is useful when you want an inclusive count.
What counts as a weekday?
This calculator counts Monday through Friday as weekdays and excludes Saturdays and Sundays.
Does this calculator store my dates?
No. The dates you enter are processed directly in your browser and are not stored on a server.