Business Days Calculator
The Business Days Calculator calculates exact, real-time domain outputs in active voice. The Business Days Calculator calculates exact, real-time domain outputs using verified mathematical formulas. Essential for SLA deadlines, T+1/T+2 securities settlement, courier shipping estimates, and project management, the Business Days Calculator iterates across calendar dates to exclude Saturdays, Sundays, and any public/bank holidays falling in the range.
Interactive Business Days Calculator Workspace
Launch Interactive Business Days Calculator →
Business Days Calculator Input Parameters & Defaults
| Start Date (YYYY-MM-DD) | 2026-11-01 | Project or SLA start date. |
| End Date (YYYY-MM-DD) | 2026-11-30 | Project or SLA target date. |
| Public Holidays in Period (Days) | 2 | Number of weekday public/bank holidays in the date range. |
Business Days Calculator Mathematical Formula
D_{\text{biz}} = \sum_{d = D_1}^{D_2} \mathbb{I}_{\text{weekday}(d) \in [1..5]} - H_{\text{holidays}}Business Days Calculator Worked Example
Counting working days from 2026-11-01 to 2026-11-30 with 2 public holidays.
- Total calendar days in November 2026 = 30 days.
- Weekend days (Saturdays + Sundays) in November 2026 = 9 days.
- Gross Weekdays = 30 - 9 = 21 weekdays; Subtract 2 public holidays = 19 Net Business Days.
A 20-business-day SLA starting November 1 actually extends into December once weekends and bank holidays are excluded.
Business Days Calculator Glossary of Key Terms
Start Date (YYYY-MM-DD) (Business Days Calculator)
Project or SLA start date.
End Date (YYYY-MM-DD) (Business Days Calculator)
Project or SLA target date.
Public Holidays in Period (Days) (Business Days Calculator)
Number of weekday public/bank holidays in the date range.
Gregorian Leap-Year Rule
The calendar rule stating that a year is a 366-day leap year if divisible by 4, excluding century years not divisible by 400.
ISO-8601 Week Date
An international standard where weeks start on Monday and Week 1 contains the year's first Thursday.
Sexagesimal Base-60 Time
The standard time system dividing each hour into 60 minutes and each minute into 60 seconds.
Business Days Calculator Topical Map & 104 Semantic Keywords
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Business Days Calculator Frequently Asked Questions
Q: What does '10 Business Days' mean in shipping and banking?
It means 10 working weekdays (Monday–Friday) excluding Saturdays, Sundays, and gazetted bank holidays—typically equating to 14 to 16 calendar days.