Date Calculator & Days Between Dates

Compare two dates instantly and see the difference in days, weeks, months, and calendar breakdowns.

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Interactive Converter

Date difference

Start dateEnd dateInclude end date

End date is after start date

days

End date is after start date
7 days
0.2 approx. months
0.02 approx. years

This date calculator helps you calculate the number of days between two dates without spreadsheets or manual counting.

It is useful for project timelines, travel planning, billing periods, deadlines, subscriptions, and everyday date math.

Select the start date
Choose the first date in the range you want to calculate.
Select the end date
Choose the second date and decide whether to include the end date.
Review the breakdown
Copy the total days and supporting week, month, and year breakdown.

Days until deadline

Calculate the number of days between a start date and a project deadline.

Input

Start: 2026-01-01, End: 2026-01-31

Output

30 days, 4 weeks and 2 days

Inclusive date range

Include both the start and end date when counting a travel window.

Input

Start: 2026-03-10, End: 2026-03-15, Inclusive: true

Output

6 days including the end date

Does the date calculator include the end date?

By default it calculates the difference between dates. You can enable inclusive counting when you want to count both start and end dates.

Can I calculate dates in the past?

Yes. The tool works both forward and backward and shows whether the end date is before or after the start date.

Does it account for leap years?

Yes. The calculation uses real calendar dates, so leap days are included when they fall inside the selected range.