Business Days
Working days between two dates
About This Calculator
Business days (working days) exclude weekends (Saturday and Sunday) and public holidays. Calculating business days is essential for contract terms, shipping estimates, legal notice periods, check clearance times, and project scheduling. The exact count varies by country and jurisdiction due to different public holiday calendars.
Formula
Business days = Calendar days − Weekends − Public holidays
Weeks = floor(days/7); Business days ≈ Weeks×5 + remaining weekdays
For partial weeks: count Mon–Fri only, skip Sat–Sun
Example Calculation
Business days between March 16 and April 16, 2026 (no holidays)
- Calendar days = 31 (March 16 to April 16)
- Full weeks = 4 weeks × 5 = 20 business days
- Remaining 3 days: Mon, Tue, Wed = 3 business days
- Total = 23 business days
23 business days (assumes no public holidays)
Calendar Days vs Business Days
| Calendar Days | Business Days (approx) | Weeks |
|---|---|---|
| 7 | 5 | 1 |
| 14 | 10 | 2 |
| 30 | 21-22 | ~4.3 |
| 60 | 42-44 | ~8.6 |
| 90 | 63-65 | ~12.9 |
| 180 | 128-130 | ~26 |
Frequently Asked Questions
What counts as a business day?
Typically Monday through Friday, excluding public holidays. In some industries (banking, legal), 'business day' has a specific legal definition. International businesses must specify the jurisdiction's holiday calendar — a US business day and a UK business day can differ.
How do I count business days for legal notices?
'30 business days' typically means 30 working days, not 30 calendar days. Read contracts carefully — 'days' alone usually means calendar days; 'business days' or 'working days' means Monday-Friday minus holidays. When in doubt, specify explicitly.
Does the start or end date count as a business day?
This varies by jurisdiction and context. Most legal and financial calculations exclude the start date and include the end date (or vice versa). For example, a 3-day right of rescission starting Monday excludes Monday and counts Tuesday, Wednesday, Thursday.
How many business days are in a year?
Approximately 250-262 depending on the country and how many public holidays fall on weekdays. The US averages 252, the UK 252, and countries with more public holidays fewer. Leap years add one calendar day but not necessarily one business day.