How do I calculate the number of days between two dates?

Enter a start date and end date in the calculator above and click Calculate. The tool instantly shows the total number of days, weeks, months, and years between the two dates, along with a detailed breakdown.

What counts as a business day?

Business days are weekdays (Monday to Friday), excluding Saturday and Sunday. This calculator counts all weekdays between the two dates. Public holidays are not excluded as they vary by country and region.

Does the calculator include or exclude the start and end dates?

The calculator counts the number of days between the two dates (exclusive of both endpoints by default). The start date day 0 and the end date is the final day, so the difference between Jan 1 and Jan 2 is 1 day.

← Back to all tools

📅 Date Difference Calculator

Find the exact number of days, weeks, months, and years between any two dates.

📅

Select Dates

START DATE

END DATE

📊

Result

Enter two dates above and click Calculate.

📖

About This Calculator

This tool calculates the exact duration between two dates using your browser's local date engine. Results include total days, weeks, business days (Mon–Fri), and a detailed breakdown of years, months, and remaining days. All calculation is done entirely client-side — no data is sent anywhere.

📅 Handles leap years

💼 Business days included

✓ Zero server transmission

❓

Frequently Asked Questions

How is the date difference calculated?

The tool calculates the exact number of calendar days between two dates. It counts every day inclusively, accounting for leap years and varying month lengths automatically.

Are time zones considered in the calculation?

The calculation is date-only and does not factor in time zones or daylight saving time. Both dates are treated as midnight in a neutral context, giving a consistent day count regardless of your location.

Can I calculate the difference involving future dates?

Yes. You can use any combination of past and future dates. The tool will calculate the difference between them regardless of whether the dates are in the past, present, or future.