Date Calculator
Calculate the days between two dates or add and subtract days, weeks, months or years from a date. Free online date calculator with business days.
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How to use Date Calculator
- 1Choose 'Days between dates' to count the time between two dates, or 'Add / subtract days' to find a date in the future or past
- 2Enter the dates (leave the start date empty to use today) or the number of years, months, weeks and days
- 3Click Calculate to see the total days, weeks, months, business days — or the exact resulting date and weekday
Frequently asked questions
How do I calculate the number of days between two dates?▾
Enter a start and end date and click Calculate. The standard count excludes the end date (Jan 1 to Jan 2 is 1 day); tick 'Include end date' if you want to count both days, e.g. for hotel nights vs. event days.
How many days until a date?▾
Leave the start date empty so it uses today, enter the future date as the end date, and click Calculate.
How are business days counted?▾
Business days are Monday to Friday between the two dates. Weekends are excluded; public holidays are not, because they differ by country.
What date is 90 days from today?▾
Switch to 'Add / subtract days', leave the start date empty, enter 90 in Days and click Calculate. The result shows the date and weekday.
How does adding months work at the end of a month?▾
If the day does not exist in the target month, the calculator uses the last day of that month — January 31 plus 1 month is February 28 (or 29 in a leap year).
Embed Date Calculator on your website▾
Paste this snippet into your page. The embedded tool runs in your visitor's browser and shows a small “Powered by clkr.work” link.