date tools
Business Days Calculator
Count weekdays between two dates with optional excluded holiday dates.
Private by design
Enter your values
Results update locally in this browser.
One idea, three depths
Choose how deeply to explain Business days
Business days: Count weekdays between two dates with optional excluded holiday dates.
Age 5Explain it to a 5-year-oldStart with a picture
Imagine marking days on a calendar, like counting how many sleeps remain before a birthday. Count weekdays between two dates with optional excluded holiday dates.
Age 15Explain it to a 15-year-oldConnect it to the formula
Count weekdays between two dates with optional excluded holiday dates. Business days are Monday through Friday. User-entered holidays are excluded when they fall inside the range. Change one input or choice at a time and compare the result to see which part of the rule it controls.
CollegeExplain it at college levelState the model precisely
The browser applies deterministic calendar arithmetic to the dates and options supplied by the user. Business days are Monday through Friday. User-entered holidays are excluded when they fall inside the range. Entries and results remain in this browser. Important results should still be checked against the records, standards, or rules that govern the real situation.
How this tool works
Business days are Monday through Friday. User-entered holidays are excluded when they fall inside the range.
Privacy and limitations
Your entries and results stay in this browser. Check important results against the rules, records or systems that govern your situation.
Reuse the page responsiblyCite this pageAPA, MLA, Chicago, Harvard, BibTeX and RIS
These formats cite this calculator page itself. They are separate from the academic references above, which support the mathematical method and terminology.
APA 7
MW SysArc. (2026, July 21). Business Days Calculator. MW SysArc Tools. https://date.mwsysarc.com/business-days-calculator
MLA 9
MW SysArc. “Business Days Calculator.” MW SysArc Tools, 21 July 2026, https://date.mwsysarc.com/business-days-calculator. Accessed 31 Aug. 2026.
Chicago 17
MW SysArc. “Business Days Calculator.” MW SysArc Tools. Published July 21, 2026. Accessed August 31, 2026. https://date.mwsysarc.com/business-days-calculator.
Harvard
MW SysArc (2026) ‘Business Days Calculator’, MW SysArc Tools. Published 21 July 2026. Available at: https://date.mwsysarc.com/business-days-calculator (Accessed: 31 August 2026).
BibTeX and RIS records
BibTeX
@misc{mwsysarc_business_days_2026,
author = {{MW SysArc}},
title = {Business Days Calculator},
howpublished = {MW SysArc Tools},
year = {2026},
url = {https://date.mwsysarc.com/business-days-calculator},
note = {Published July 21, 2026; accessed August 31, 2026}
}RIS
TY - ELEC
AU - MW SysArc
TI - Business Days Calculator
T2 - MW SysArc Tools
PY - 2026
DA - 2026-07-21
Y2 - 2026-08-31
UR - https://date.mwsysarc.com/business-days-calculator
N1 - Published July 21, 2026
ER -Clear answers
Frequently asked questions
What does the Business days do?
Count weekdays between two dates with optional excluded holiday dates.
How does the Business days work?
Business days are Monday through Friday. User-entered holidays are excluded when they fall inside the range.
What can I learn from the Business days?
It shows how the entered values or choices produce the result. Change one input at a time to compare outcomes and understand the underlying rule.
Does MW SysArc receive or store what I enter?
No. The calculation runs locally in your browser. MW SysArc does not receive or store your calculation inputs.
How should I use the result?
Use the result as a practical reference. Review the inputs, assumptions and stated limitations before relying on it.
Last reviewed . Calculations tested .