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Free Tool Arena

Productivity · Free tool

Deadline Calculator

Add business days or working hours to a start date and get the actual deadline — holidays excluded.

Updated June 2026

Deadline date

June 15, 2026

Day of week

Monday

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What it does

Add business days or working hours to a start date and get the real-world deadline — weekends and US federal holidays excluded. Useful for project timelines, SLA calculations, and contract deadlines that say "within 10 business days".

Pair with date difference calculator, time duration calculator, countdown timer, and public holidays.

Embed this tool on your siteShow snippet

Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.

<iframe src="https://freetoolarena.com/embed/deadline-calculator" width="100%" height="720" frameborder="0" loading="lazy" title="Deadline Calculator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>
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How to use it

  1. Pick the start date.
  2. Enter business days or working hours to add.
  3. Optionally include US federal holidays.
  4. Read the resulting deadline.

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