Days Between Dates Calculator
Find the number of calendar days between a start date and an end date.
This calculator measures the difference between two calendar dates. It is useful when you need to know how many days separate a past date, today, or a future date.
Choose a start date and an end date, then calculate the difference. The result uses calendar days and explains the elapsed interval.
Enter the values you want to compare or calculate, then use the result as a practical reference. The calculator runs in your browser and does not require an account.
This tool also fits into a wider set of practical utilities. Depending on what you are trying to calculate or measure next, you can continue with Date Difference Calculator, Weeks Between Dates Calculator, Months Between Dates Calculator and Days Until a Date Calculator. For the complete collection, visit the utility tools homepage and choose another tool when your task changes.
How to use this calculator
- Enter your values. Select the dates or numbers required by the calculator.
- Check the inputs. Make sure the dates are in the order and range you intend to calculate.
- Calculate the result. The result appears instantly in the calculator above without submitting a form.
- Use the result. Apply the result to your schedule, deadline, planning or date calculation.
How the calculation works
Enter the values you want to compare or calculate, then use the result as a practical reference. The calculator runs in your browser and does not require an account. The calculation is performed locally in your browser, so the page can return a result immediately after you change the inputs.
Things to know about date calculations
Calendar calculations can differ depending on whether a result is treated as an elapsed interval or an inclusive count. This site uses clear calendar-date rules and explains important assumptions where they affect the result. Business-day calculations on this page exclude weekends but do not automatically remove public holidays.
Frequently asked questions
How are days between dates calculated?
The calculator compares the two calendar dates and returns the number of elapsed calendar days between them.
Does the result include both dates?
The default result is the elapsed difference between the dates, not an inclusive count of both endpoints.