How to calculate only weekdays?

Use the Business Days tab. It automatically counts Monday-Friday only.

Can I calculate 90 days from today?

Yes! Use the Add/Subtract Days tab with today's date and add 90 days.

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

📖 Days Calculator - Days Between Dates, Business Days & Add/Subtract

A days calculator is an essential tool for anyone who needs to calculate time intervals between dates, count business days (Monday-Friday), or add/subtract days from a specific date. Whether you're planning a project, tracking a deadline, estimating shipping time, or counting down to an event, this tool provides accurate results instantly.

📐 How to Calculate Days Between Dates

Days = End Date - Start Date

To calculate the number of days between two dates manually:

Subtract the earlier date from the later date
Account for different month lengths (28-31 days)
Include leap years (February 29)
This calculator handles all complexities automatically

📊 Calendar Days vs Business Days

Type	Definition	Common Use
Calendar Days	All 7 days (Mon-Sun)	Warranty, age, event countdown
Business Days	Mon-Fri only	Shipping, project deadlines, work schedules
Weekend Days	Sat-Sun only	Rest days, leisure planning

💡 Common Use Cases

Project Planning: Calculate duration in days for realistic scheduling
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.

❓ 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 2 days if you count both dates.

❓ 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.