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📅 Working Days Calculator
Project planning, billable hours, lead-time estimates — all need a count of business days, not raw calendar days. Pick a start and end date, optionally add holidays to exclude, and we count the working days (Mon-Fri) between them.
Examples
2026-01-01 → 2026-03-31~64 working days (no holidays)Add holiday dates one per line — the tool excludes them from the count.
Frequently asked questions
Does it include the start date?
Yes — start and end dates are both inclusive when counting.
What about half-days or shortened weeks?
Not handled — we treat any Mon-Fri as one full working day. Add manual adjustments if you need fractional days.
Where do I find the holiday list for my country?
Government labor sites publish official holidays. Copy-paste them as YYYY-MM-DD into the holidays field.
About this tool
Working Days Calculator runs entirely in your browser using standard Web APIs. No data is sent to any server. The source for this tool is in our public GitHub repository.
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Why this tool
vs typical free web-tool sites
| 1vw | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for premium features) |
| Ads inside the tool | No | Yes (banner + video) |
| Data sent to server | No (browser-only) | Yes (inputs analyzed for ads) |
| Total tools | 96 | Often <20 or scattered across sites |
| Bookmarkable URL per tool | Yes | Mixed |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Open source | Yes | No |