Date calculator
Business Days Calculator
Count weekdays between two dates or add business days to a starting date. Add your own holidays for the country or workplace that applies.
Count business days
Add business days
What problem does this business-days calculator solve?
It counts weekdays between two dates or adds and subtracts working days while skipping selected weekends and holidays. It is useful for project estimates, invoices, delivery planning, and internal schedules.
How to calculate business days
- Select the start and end dates, or choose the add/subtract mode.
- Choose whether the start date is included.
- Confirm which weekend days should be excluded.
- Add any applicable holidays in YYYY-MM-DD format.
- Calculate and review the result and assumptions.
Privacy, inputs, and limits
- Upload: No files or dates are uploaded; calculation happens in your browser.
- Input: Calendar dates and optional holiday dates.
- Output: A planning calculation only.
- Holiday calendars are not downloaded automatically.
- Courts, banks, carriers, markets, agencies, employers, and contracts may define a business day differently.
Example
For a task beginning Monday, adding five business days while excluding Saturday and Sunday usually reaches the following Monday when no holiday is entered. Inclusion rules can change the result, so check the selected option.
Frequently asked questions
Are public holidays included automatically?
No. Enter the holidays that apply to your country, state, organisation, or agreement.
Are both start and end dates counted?
Use the inclusion option shown in the tool. Different organisations use different counting rules.
Can I use the result for a legal deadline?
Use it as a planning aid only. Confirm legal, tax, court, payment, filing, and contractual deadlines with the responsible authority or qualified adviser.