Payment terms
Add 30 days to an invoice date to find the due date.
Date Difference Calculator
Count exactly how many days, weeks and working days lie between two dates, or add and subtract days to find a deadline. Weekends can be Saturday and Sunday, or Friday and Saturday as in the Gulf.
- 100% free
- No sign-up
- Runs in your browser
Weeks
Working days
Weekend days
Hours
Result
How to use
How to use the Date Difference Calculator
- Choose Days between dates and pick a start and end date.
- Choose your weekend to count working days correctly.
- Tick Include the end date if both days count.
- Or switch to Add or subtract to find a date in the future or past.
Private by design. Calculations happen in your browser. Nothing you enter is uploaded or stored.
About this tool
Counting days and working days correctly
The difference between two dates normally excludes the start date, so from Monday to Wednesday is two days. For bookings, leave periods and project durations where both the first and last day count, tick Include the end date to add one.
Working days skip weekends, which differ by country. Pakistan and most of the world use Saturday and Sunday, while Saudi Arabia and several Gulf states use Friday and Saturday. Public holidays vary too much to include automatically, so subtract any that fall in your range.
Good to know
Practical uses
Notice periods
Count working days for resignation or contract notice.
Project plans
Add working days to a start date for a realistic deadline.
Remember holidays
Subtract public holidays from the working-day count.
FAQ
Date Difference Calculator FAQs
Is the end date included?
Not by default. Tick Include the end date to count both days.
Does it include public holidays?
No. Holidays differ by country and year, so subtract them yourself.
What happens when adding a month to 31 January?
You get the last day of February, because February has no 31st.
Can I count working days for the UAE or Saudi Arabia?
Yes. Choose Friday and Saturday as the weekend.
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