Date Calculator
Find the exact duration between two dates, or add/subtract days from any date
Duration Result
Select two dates and click Calculate.
Frequently Asked Questions
The calculator counts the exact number of calendar days between the two dates, including leap year days. The result is also broken down into total weeks, months (approximate), and years (approximate) for easy reading. Weekdays and weekends are counted separately for workday planning.
Yes, all calendar days are counted by default. The tool also shows how many of those days are weekdays (Mon–Fri) and how many are weekends (Sat–Sun). Public holidays are not excluded since they vary by country and region.
Yes. In the "Add / Subtract Days" tab, choose "Subtract" and enter the number of days to go back in time from your chosen start date. There is no limit on how far back or forward you can calculate.
Calendar months count complete months between two dates (e.g., Jan 1 to Mar 1 = 2 months exactly). Approximate months divide total days by 30.44 (the average days per month). This tool shows the approximate value alongside the exact day count so you always have both references.
About Date Calculator
What This Tool Does
The Date Calculator helps you find the exact duration between two dates — in days, weeks, months, and years. You can also calculate a future or past date by adding or subtracting a number of days from any start date. All calculations are done instantly in your browser.
Common Use Cases
- Project deadlines — days until due date
- Contract duration — start to end date
- Event planning — days until a birthday or anniversary
- Finance — loan term or investment period
- HR — employee tenure, notice periods
