Date Calculator: Days Between Dates & Add/Subtract Days
By ToolZoneX Team
•
June 2026
Need to know how many days until a deadline? Or what date it will be 90 days from now? Our date calculator handles all date arithmetic including business days calculation.
How to Use Date Calculator
1.
Choose mode: "Days Between" or "Add/Subtract Days"2.
Enter the start date (and end date or number of days)3.
View the result with breakdown in weeks and days4.
Toggle business days only if needed
Key Features
- Days between any two dates
- Add or subtract days/weeks/months from a date
- Includes/excludes weekends option
- Shows result in multiple units
When to Use This Tool
•
Calculating project deadlines•
Finding notice period end dates•
Planning events and travel•
Counting business days for contracts
Frequently Asked Questions
Yes, all calculations correctly handle leap years and varying month lengths.
Business days exclude Saturdays and Sundays. Public holidays are not automatically excluded as they vary by region.
Ready to get started?
Open Date CalculatorRelated Tools
Date Calculator
Use Date Calculator now