Find the exact days, weeks, months and working days between two dates, or add days to any date to get a deadline. Free, instant and accurate.
The Date Difference Calculator finds the exact number of days, weeks, months and working days between any two dates, or adds a number of days to a starting date to work out a deadline. It answers the common question of how many days until a date directly, and separately reports working days that exclude weekends.
Whether you're calculating a project deadline, working out someone's exact age, or figuring out how many business days remain before a delivery date, the calculator handles the date arithmetic instantly and precisely, avoiding the manual counting errors that come from working it out by hand or on a paper calendar.
Total days and a separate working-days figure excluding Saturdays and Sundays are both shown, useful for different kinds of deadline calculations.
As well as finding the gap between two dates, the tool can add or subtract a number of days from a date to find a resulting deadline.
Results are broken down into days, weeks and months, giving whichever unit is most relevant without needing separate conversions.
Counting days across month boundaries and leap years by hand is error-prone; the calculator handles this precisely every time.
The working-days figure excludes Saturdays and Sundays but does not automatically account for public holidays, since these vary by country and region — for a fully accurate business-day count, subtract known holidays from the working-days result manually.
Entering a negative number of days in the add-days panel calculates a date in the past, which is useful for working backwards from a known deadline to find when a task needed to start.
The calculator automatically accounts for leap years and varying month lengths, so a date range spanning February in a leap year, or crossing several months of different lengths, is always calculated correctly.
Spreadsheet date functions like DATEDIF can do similar calculations but require remembering specific formula syntax. This tool gives the same result instantly from two date pickers with no formula to write.
Both. The result shows total calendar days as well as a separate working-days figure that excludes Saturdays and Sundays.
Yes. Enter a start date and the number of days in the second panel — use a minus sign to go backwards in time.
Yes. Date Difference Calculator on Klipza is completely free with no account, no subscription and no watermark on your files, and there is no daily usage limit.
Processing happens locally in your browser wherever technically possible, so your files are not uploaded to a server, stored or shared with third parties.
Yes. It is fully responsive and runs in any modern browser on Android, iPhone, iPad, Windows and macOS — nothing to install.