Date Calculator
Count exactly how many days sit between two dates, or take a date and move it forward or back by any number of days. Both answers update live, and the first calculator also counts business days with weekends excluded.
Date Calculator tool
Days between two dates
Add or subtract days
How to use it
- Pick two dates to count the days between them.
- Read the total in days, business days, weeks and months.
- Use the second calculator to move a date forward or back.
Worked example
Counting days, business days and months
The day count is the plain difference between two dates, so a start and end date one week apart returns 7. Whether you also count the first day is a matter of convention: contracts and deadlines usually count from the day after the start, which is what this calculator does.
Business days skip Saturdays and Sundays, which is how shipping estimates and payment terms such as net 30 are normally read. Public holidays are not deducted here, since they vary by state and industry, so subtract those separately if your deadline depends on them.
Months are trickier than days because they differ in length. The month figure counts complete calendar months, so January 31 to February 28 is zero full months plus 28 days, not one month.
Common uses
- Counting down to a deadline or event
- Working out a net 30 payment date
- Checking a notice period or contract term
- Adding a warranty or trial period to a start date