Business Days Calculator
Count or add working days, skipping weekends.
Enter your values
Enter the start date in YYYY-MM-DD.
Enter the business days to add you are working with.
Enter the public holidays in that span you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Resulting business day
- 2026-08-11
- Day of the week
- Tuesday
- Calendar days elapsed
- 14
- Weekend days skipped
- 4
Quick answer
Business days exclude Saturdays and Sundays; a five-day working week averages 21.7 business days per month.
At a glance
| What it does | Count or add working days, skipping weekends. |
|---|---|
| Category | Date & Time |
| Inputs needed | Start date, Business days to add, Public holidays in that span |
| Main output | Resulting business day |
| Cost | Free — no sign-up, no download |
How to use the Business Days Calculator
- 1Enter the starting date.
- 2Enter how many business days to add.
- 3Include any public holidays in the span.
Inputs explained
- Start date(YYYY-MM-DD)
- Enter the start date in YYYY-MM-DD.
- Business days to add
- Enter the business days to add you are working with.
- Public holidays in that span
- Enter the public holidays in that span you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Start date2026-07-28 YYYY-MM-DD
- Business days to add10
- Public holidays in that span0
Results
- Resulting business day2026-08-11
- Day of the weekTuesday
- Calendar days elapsed14
- Weekend days skipped4
Frequently asked questions
Are public holidays excluded automatically?
No — holidays vary by country and state, so enter how many fall in the period and they are skipped too.
How many business days in a year?
About 261, before public holidays and leave.
What do I need to enter into the Business Days Calculator?
Just 3 values: start date, business days to add, public holidays in that span. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Business Days Calculator work out the answer?
Business days exclude Saturdays and Sundays; a five-day working week averages 21.7 business days per month. The working is shown step by step so you can verify the result by hand.
Is the Business Days Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.