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Business Days Calculator

Date & Time

Count or add working days

Quick Answer

Business Days Calculator: Count or add working days. Business Days Calculator uses standard date & time formulas to compute accurate results instantly.

Business days in range
17 days
31 calendar days total
Calendar days31
Weekends8
Holidays6

Calculation steps

  1. 1Range: 2025-10-01 → 2025-10-31, 31 calendar days (inclusive)
  2. 2Weekends: 8, custom holidays (weekdays): 6
  3. 3Business days = 31 − 8 − 6 = 17
China's official holiday schedule includes "shifted working weekends" (调休): some weekends are working days and some weekdays are off. Enter those dates manually in the holiday box for an exact count. Contract SLA, interest accrual and shipping ETAs usually count calendar days unless stated otherwise — check the fine print.

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How to Use

  1. Pick dates or a mode: select start/end dates or switch modes in the Business Days Calculator.
  2. Instant calculation: results appear immediately with day/week/month equivalents.
  3. Solve both ways: change any field and everything updates — forward or reverse.
  4. Check the context: read the solar-term/holiday/rule notes on this page.

Key Points

  • Business Days Calculator is a free online date & time tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Count or add working days.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Business Days Calculator formula

Business Days Calculator uses standard date & time formulas to compute accurate results instantly.

FAQ

How do I use the Business Days Calculator?
Open the page and fill in the input fields — results update automatically. Count or add working days.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on standard calendar arithmetic. Last updated: 2025-07

Authoritative sources:

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Business Days Calculator[EB/OL]. https://www.yijiansuan.com/en/c/date/business-days

Results provided by this tool are for reference only and do not constitute professional advice.