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Count weekdays inclusively between ISO YYYY-MM-DD values using UTC anchors. Useful for SLA timers and shipping estimates; add regional holidays manually if they apply.
Quick answer: Business Days Calculator
Pure Mon–Fri counting for SLA timers without holiday logic baked in.
Example: March window counts weekdays for shipping estimates before subtracting public closures manually.
Calculations follow the documented formula on this page; rounding and input units can change the last digit-treat outputs as educational estimates unless you reconcile with source systems.
* This is an estimate. Actual amounts may vary slightly based on input assumptions.
Helpful for international teams that attach holiday tables separately in Notion or Jira automation.
Count weekdays inclusively between ISO YYYY-MM-DD values using UTC anchors. Useful for SLA timers and shipping estimates; add regional holidays manually if they apply.
Inputs on this page: Start date (YYYY-MM-DD), End date (YYYY-MM-DD). Assumptions stay visible so you can reproduce the figure elsewhere.
Long-form walkthroughs that pair well with this calculator. When you need narrative context beyond the live fields, start here and return to the tool to plug in your own numbers.
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Read guide →People who care about business days calculator use Business Days Calculator as a planning sandbox: Inclusive semantics match many finance calendars - confirm with legal if exclusive is required.
Continue in the Utility category hub, the Utility tools collection, or the glossary. Related calculators in this session: Time Zone Converter, Date Difference Calculator, Age Calculator, Notice Period Calculator, Working Days Calculator UK, Word Counter.
The Formula
Weekdays Mon–Fri UTC inclusive between ISO dates| This tool | Weekdays Mon–Fri UTC inclusive between ISO dates |
|---|---|
| Related intent: business days calculator | See paired tools for business days calculator-each page documents its own core relationship next to the live form. |
| Related intent: weekdays between two dates | See paired tools for weekdays between two dates-each page documents its own core relationship next to the live form. |
Core relationship for Business Days Calculator:
Weekdays Mon–Fri UTC inclusive between ISO dates
Worked check: March window counts weekdays for shipping estimates before subtracting public closures manually.
Keep the same assumptions and open a neighbor calculator when your question branches: Time Zone Converter, Date Difference Calculator, Age Calculator, Notice Period Calculator. Each page documents its own formula beside the fields.
Learning links: Methodology · Editorial policy · Glossary
March window counts weekdays for shipping estimates before subtracting public closures manually.
Re-enter the same numbers in the calculator above to confirm the page math matches the interactive result.
People who care about business days calculator use Business Days Calculator as a planning sandbox: Inclusive semantics match many finance calendars - confirm with legal if exclusive is required.
Instant response
Run Business Days Calculator in the browser and read the breakdown beside the form.
Transparent formula
The formula and worked example on this page match what the calculator uses.
Privacy friendly
No account required; inputs stay in your session unless you choose to share them.
Cross-device ready
Layout works on mobile, tablet, and desktop for the same field labels.
Official references for context. Calculator outputs are planning estimates—confirm material decisions with the primary authority or a qualified professional. See our methodology and editorial policy.
Reviewed July 18, 2026 · Content stamp 2026-07-18
Click a question to expand the answer.
Both endpoints are inclusive weekdays in this tool.
Subtract them manually or use a count from a calendar export.
Not supported; round to full days in policy.
This still excludes Sat/Sun from the weekday tally.
Not relevant to day counting here.
Pure Mon–Fri counting for SLA timers without holiday logic baked in.
March window counts weekdays for shipping estimates before subtracting public closures manually.
Inclusive semantics match many finance calendars - confirm with legal if exclusive is required. Half-day SLAs still need human rounding policies.
Same-category picks first, then high-intent neighbors that often answer the next calculation question.
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Reviewed by Toollabz Editorial
Product editor | Last reviewed July 18, 2026
See methodology and editorial policy.