Days Between Dates Calculator
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Calculating Days Between Dates
How It Works
This calculator determines the exact number of days between two dates, including options for business days (excluding weekends) and the choice to include or exclude the end date from the count.
Common Use Cases
Project Planning
Calculate project duration, deadlines, and milestones using business days.
Event Countdown
Count down days until weddings, vacations, graduations, or other events.
Contract Periods
Determine exact duration for rental agreements, subscriptions, or warranties.
Financial Calculations
Calculate interest accrual periods or payment schedules.
Business Days Explained
Business days (also called working days or weekdays) typically exclude:
- Saturdays and Sundays
- Federal/national holidays (varies by country)
- Company-specific holidays
Note on Holidays
This calculator excludes weekends but does not automatically account for holidays. For precise business day calculations, you may need to manually adjust for holidays relevant to your location or industry.
Frequently Asked Questions
How do I calculate the exact number of days between two dates?
Enter your start and end dates in the calculator above. It will instantly show the total number of calendar days, business days (excluding weekends), weeks, and months between them.
What are business days and how are they calculated?
Business days are weekdays (Monday through Friday) excluding weekends. Our calculator counts business days by removing Saturdays and Sundays from the total. Note that public holidays are not automatically excluded and vary by country.
Should I include the start and end dates in my count?
It depends on your needs. For duration calculations (like rental periods), you typically include both dates. For countdowns ('days until'), you usually exclude today. Our calculator offers options for both methods.
How many business days are in a year?
A typical year has approximately 260 business days (52 weeks × 5 days). However, the exact number varies based on how weekends fall and doesn't account for holidays. Use our calculator for precise counts between specific dates.