Days Calculator | Days Between Dates, Business Days, Add/Subtract Days

📖 How to Use This Days Calculator

Choose calculation type - Select "Days Between", "Business Days", or "Add/Subtract Days".

For Days Between: Enter start and end dates to get total calendar days.

For Business Days: Enter start and end dates to get working days (Monday-Friday).

For Add/Subtract: Enter base date and days to add/subtract to calculate new date with weekday.

📅 Understanding Calendar Days vs Business Days

Calendar Days include all days of the week (Monday through Sunday). This is useful for counting total elapsed time for contracts, warranties, or personal events.

Business Days exclude Saturdays and Sundays. This is commonly used in business contexts like project deadlines, shipping times, loan processing, and work schedules. Business days typically count Monday through Friday.

💡 Common Use Cases

Project Management: Calculate project duration in business days for realistic planning
Contract Deadlines: Determine if deadlines fall on weekdays or weekends
Event Planning: Count days until weddings, vacations, or special events
Shipping & Delivery: Estimate delivery times based on business days
Loan Processing: Calculate approval and funding timelines
Employment: Calculate work days for payroll or attendance tracking

❓ Frequently Asked Questions (FAQ)

What is the difference between calendar days and business days?

Calendar days include every day of the week (including weekends). Business days count only Monday through Friday, excluding Saturdays and Sundays. Business days are commonly used for work-related deadlines and shipping estimates.

Are holidays excluded from business days?

This calculator excludes only weekends (Saturdays and Sundays). For holidays, you would need to manually subtract them. Many business day calculations consider holidays separately based on specific calendars.

Does the calculator count the end date?

Yes, the calculation includes both start and end dates when counting days. For example, from Monday to Tuesday is 1 day.

How do I calculate only weekdays (Monday-Friday)?

Use the "Business Days" tab in our calculator. It automatically counts only Monday through Friday days between your selected dates.

Can I calculate what date is 90 days from today?

Yes! Use the "Add/Subtract Days" tab. Enter today's date as the base date and add 90 days to see the future date and its weekday.

Does the calculator handle leap years correctly?

Yes, the calculator automatically accounts for leap years (February 29) in all date calculations, ensuring accurate day counts across all years.