How many days are between two dates?

Select both dates and the tool shows total days, weeks, months, years and business days instantly, entirely in your browser.

Does it handle leap years?

Yes, all math uses native calendar logic including leap years.

Date Calculator — Days Between Dates & Add/Subtract Days

Date Difference & Add/Subtract Calculator

Count the exact time between two dates (including business days), or add and subtract days from any date. Useful for deadlines, contracts, pregnancies, visas, and project planning.

Days Between Two Dates

Start Date:

End Date:

Add / Subtract Days

Base Date:

Days (negative to subtract):

Difference Result

Total days	—
Weeks + days	—
Months + days (approx.)	—
Years, months, days	—
Business days (Mon–Fri)	—
Weekend days	—

Add / Subtract Result

—

How Date Differences are Calculated

The total-days figure is the exact number of calendar days between your two dates. The years/months/days breakdown walks the calendar month by month, so it respects different month lengths and leap years exactly.

Business days count Monday through Friday only. Public holidays vary by country, so subtract your local holidays from the business-day figure where relevant.

Frequently Asked Questions (FAQ)

Q: Does the calculator handle leap years?

A: Yes. All math uses the browser’s native calendar logic, which includes leap years and daylight saving changes.

Q: Are both endpoints counted?

A: The difference excludes the start date and includes the end date — the standard "days between" convention. Add 1 if you need an inclusive count.

Q: Can I calculate a deadline 90 days from today?

A: Yes — the Add/Subtract panel defaults to +90 days from today.