Date Difference Calculator
Calculate the exact number of days, business days, weeks, and months between two calendar dates.
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How to Use the Date Difference Calculator
Enter the required values in the fields above and click Calculate. All calculations are executed directly inside your web browser using proven mathematical formulas, ensuring instantaneous results and 100% privacy without transmitting your numbers to remote servers.
Mathematical Formula
Difference = (Date2 - Date1) in milliseconds ÷ (1000 × 60 × 60 × 24)
Worked Example
Between March 1, 2025 and March 15, 2025 there are 14 calendar days and 10 business days.
Important Notes & Limitations
Business days calculation excludes Saturdays and Sundays. Public holidays vary by country and are not automatically deducted.
Frequently Asked Questions
Yes, toggle the 'Include end date' option to count both boundary days in the total.