Business Days Calculator
Enter a start date and end date — get the exact number of working days (Mon–Fri) between them. Weekends excluded, both dates inclusive. Works from today. Use it for SLA deadlines, notice periods, project sprints, and payment terms. Need public holidays excluded? Use a country-specific working days calculator. Need to add business days to a date? Use the Add Business Days Calculator.
Pick two dates — get the exact number of Mon–Fri days between them. Weekends excluded, both dates inclusive.
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Formula
Business Days = Count of Mon–Fri days from Start Date to End Date (inclusive)
Every calendar day between the two dates is checked. If it falls on Monday through Friday, it is counted. Saturday and Sunday are always skipped.
Worked Example
Scenario 1 — SLA tracking:
A support ticket is raised on Monday 5 May. Your SLA requires a resolution within 5 business days.
Start: Monday 5 May • End: Friday 9 May = 5 business days
If the period crossed a weekend (Mon 5 May → Mon 12 May): the result is 6 business days — Saturday and Sunday are excluded.
Scenario 2 — Project sprint duration:
A two-week sprint runs from Monday 3 February to Friday 14 February.
Week 1: Mon–Fri = 5 days • Week 2: Mon–Fri = 5 days
Total: 10 business days
Scenario 3 — Payment terms check:
An invoice is issued on Friday 7 March under Net 30 business days terms. The due date falls on Thursday 17 April (30 business days later, skipping 8 weekend days).
For calendar-day Net 30 terms, use the Invoice Due Date Calculator instead — it handles both calculation methods.
Common Mistakes
- Forgetting that both dates are inclusive. Mon 1 May to Fri 5 May = 5 business days, not 4.
- Expecting public holidays to be excluded. This calculator only excludes weekends. For UK or EU bank holidays, use the regional calculators.
- Confusing calendar days with business days. A 30-calendar-day SLA is not the same as a 30-business-day SLA — the latter is roughly 6 weeks.
Guide
How to Use
- 1
Enter the start date
Select the first day of the period you want to measure.
- 2
Enter the end date
Select the last day. Both dates are included in the count.
- 3
Click Count Business Days
The tool counts every Mon–Fri between the two dates.
- 4
Copy your result
Use the copy button to paste into emails or project trackers.
Next Steps
What to do next
FAQ
Frequently Asked Questions
Related by Workflow
Country Working Days Calculators
UK Working Days
8 England & Wales bank holidays excluded
US Working Days
11 US federal holidays excluded
France Working Days
11 jours fériés excluded
Germany Working Days
9 nationwide public holidays excluded
Australia Working Days
National holidays incl. ANZAC Day excluded
South Africa Working Days
12 SA national public holidays excluded
Belgium Working Days
10 Belgian national holidays excluded
Working Days Europe
Multi-country EU working days tool
When to use this calculator
- →Counting working days between two dates for SLA tracking, notice periods, or project sprints
- →Verifying how many Mon–Fri days fall in a billing period or payment window
- →Checking how many business days remain before a contract milestone or deadline
- →Any task where weekends must be excluded but public holidays are handled separately
Example calculation
Inputs: Start Mon 3 Feb · End Fri 28 Feb
Calendar days: 28 days (including 8 weekend days)
Business days: 20 working days (4 working weeks)
Both dates are counted if they fall on weekdays. Public holidays are not excluded — use a country-specific calculator for that.
Related calculators
Why business days matter in practice
Calendar day counts include every day of the week — including Saturdays, Sundays, and public holidays. Business day counts only include Monday through Friday, which is how most professional obligations are measured.
The difference becomes significant over longer periods. A 30-calendar-day period contains approximately 21–22 business days (depending on the starting weekday). A 30-business-day period spans approximately 6 calendar weeks. Using the wrong type of count in contracts or SLAs can lead to materially different expectations.
This calculator counts every weekday between two dates inclusively — meaning both the start date and end date are counted if they fall on weekdays. This is the standard convention for SLA tracking, notice periods, and business contract timelines.
Common business-day counting scenarios
SLA tracking
Service level agreements measure response and resolution times in business hours or business days. A 5-business-day SLA raised on a Wednesday expires the following Wednesday — not the following Monday as a 5-calendar-day count would. This calculator gives the exact span for any start and end date.
Notice periods
Employment contracts, lease agreements, and supplier agreements typically specify notice periods in working days. A 20-business-day notice period is exactly 4 calendar weeks, but can span more calendar days if there are bank holidays in the window. Use the UK or US working-days calculators below to account for holidays.
Project sprints
Agile project sprints are typically 10 business days (2 calendar weeks). This calculator helps planning teams confirm the exact number of working days in any sprint period, useful for capacity planning and velocity calculations.
Payment terms verification
Invoice payment terms sometimes specify business days rather than calendar days. Net 30 business days is materially longer than Net 30 calendar days. Use this calculator alongside the Invoice Due Date Calculator to verify payment timelines and check for overdue status.
Need public holidays excluded too?
This calculator excludes weekends only. For results that also exclude national public holidays, use a country-specific working-days calculator.
Using your result for invoices or deliveries?
Once you have the business day count, use these tools to calculate payment due dates or shipping deadlines.
Next Steps
Next, you may also need
Not sure which deadline calculator to use?
Use the Business Deadline Checker to choose the right tool for invoices, contracts, SLA timing, shipping cut-offs and cross-border workflows.
Business Deadline CheckerDecision guide
Which calculator do you need?
Guides
Related planning guides
For a full guide to deadline types — calendar vs operating deadlines, SLA timing, shipping cut-offs, and cross-border calendars — see the Business Deadline Planning Guide. For invoice payment terms specifically, see the Invoice Payment Terms Guide.
Common calculations
How many business days between two specific dates?
Enter your start and end dates in the calculator above — the result is returned instantly. Example: Mon 2 March to Fri 27 March 2026 = 20 business days (4 full working weeks, weekends excluded).
What is 10 business days from today?
10 business days = exactly 2 calendar weeks assuming no public holidays. To find the specific date that is 10 business days from today, use the dedicated page.
What is 30 business days from today?
30 business days spans approximately 6 calendar weeks (42 calendar days). The exact date depends on the starting weekday. Use the dedicated page for the precise result, or use a country-specific working days calculator to also exclude public holidays.
How do I count business days excluding public holidays?
This calculator excludes weekends only. To also exclude national public holidays, use a country-specific working days calculator. For example, UK Working Days excludes 8 bank holidays; US Working Days excludes 11 federal holidays.
What is the difference between business days and calendar days?
Calendar days count every day including weekends. Business days count Monday–Friday only. Over 30 calendar days you get roughly 21–22 business days. Over 30 business days you span about 6 calendar weeks. Always check which type a contract or SLA specifies.
Common working-day questions answered
How many working days are in 2026?
There are 261 working days (Mon–Fri) in 2026 before public holidays. After excluding the 8 England & Wales bank holidays, there are 253 UK working days. After excluding 11 US federal holidays, there are 250 US business days. Use the country-specific calculators for exact counts.
How many business days between two dates?
Use the calculator above: enter your start date and end date and the result is returned instantly. Example: Mon 2 March 2026 to Fri 27 March 2026 = 20 business days (4 full working weeks).
Use the dedicated business days between dates pageWhat is 10 working days from today?
10 working days from today is exactly 2 calendar weeks ahead, assuming no public holidays. To get the exact date, use the dedicated page below.
Use the dedicated 10 business days from today pageWhat is 30 business days from today?
30 business days from today spans approximately 6 calendar weeks (42 calendar days). The exact date depends on the starting weekday and any public holidays in the window.
Use the dedicated 30 business days from today pagePopular calculations
Popular business day calculations
10 business days from today
Exact date — 2 working weeks from now
30 business days from today
Exact date — ~6 calendar weeks from now
Add 10 business days
From any start date, not just today
Add 30 business days
From any start date, not just today
Business days between two dates
Count Mon–Fri days between any two dates
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FAQ