Days Between Dates Tool

Days Between Dates

Calculate the exact number of days, weeks, months, years, hours, minutes, and seconds between any two dates.

Select Two Dates

Quick presets:

Start Date

End Date

Date Difference

0

Days Between Dates

Weeks

0

Months (approx)

0

Years (approx)

0

Hours

0

Minutes

0

Seconds

0

Additional Information

Business days (Mon-Fri)—

Weekends (Sat-Sun)—

Start day—

End day—

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How to Use the Days Between Dates Calculator

1. Select your dates — Choose a start date and an end date using the date pickers.
2. Use quick presets — Click any preset button to add 7, 30, 90, 180, or 365 days to the start date.
3. Swap dates — Click the swap button (⇄) to exchange the start and end dates.
4. View results instantly — The exact number of days, weeks, months, years, hours, minutes, and seconds appears immediately.
5. See business days — The calculator shows how many business days and weekends are between your dates.

Why Date Difference Calculation Matters

Knowing the exact number of days between two dates is essential for project planning, event scheduling, contract management, travel planning, and personal milestone tracking. Whether you are calculating days until a wedding, tracking project deadlines, or measuring time between historical events, accurate date difference calculation is invaluable.

This calculator provides a complete breakdown of the time between any two dates — from seconds to years — plus business days and weekend counts. All calculations happen locally in your browser — no data is ever sent to any server.

Key Features

• Exact Day Count — Includes both start and end dates in the calculation.
• Multiple Units — Shows results in days, weeks, months, years, hours, minutes, and seconds.
• Business Days — Counts weekdays (Monday-Friday) separately from weekends.
• Day of Week — Shows what day of the week each date falls on.
• Quick Presets — One-click buttons to add common time periods to the start date.
• Swap Dates — Easily exchange start and end dates with one click.
• 100% Private — All calculations happen locally in your browser.

Frequently Asked Questions

The calculator counts every day between the start and end dates, including both dates in the calculation. It automatically accounts for leap years and different month lengths to ensure accurate results. The difference is calculated in milliseconds and converted to days for precision.

Business days are weekdays from Monday through Friday, excluding weekends (Saturday and Sunday). The calculator counts the number of business days between your selected dates by iterating through each day and checking if it falls on a weekend. This is useful for project planning and work-related calculations.

Yes! The calculator uses JavaScript's built-in date object which automatically handles leap years correctly. February 29 is included in the count for leap years, ensuring accurate date difference calculations across any time period, whether it includes leap years or not.

Absolutely! The calculator works for any valid date - past, present, or future. You can calculate how many days until a future event (like a wedding or vacation) or how many days have passed since a historical date (like a birthday or anniversary). The direction indicator shows whether the end date is after or before the start date.

Free Days Between Dates Calculator

Calculate the exact number of days, weeks, months, years, hours, minutes, and seconds between any two dates — complete with a business-day and weekend breakdown, the day of the week for both dates, and quick presets to add 7, 30, 90, 180, or 365 days instantly. Perfect for countdowns, project deadlines, wedding and due-date planning, tenure calculations, and tracking milestones. Everything runs locally in your browser and nothing is ever sent to a server.

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Dates updated!