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Working Days Calculator

Count working days using your weekend pattern and a custom list of holiday dates.

Calculate with your own values

Local processing. No account, uploads or saved history.

Calendar date, 1900–2100. No time zone or daylight-saving adjustment.
Calendar date, 1900–2100. No time zone or daylight-saving adjustment.
Choose whether the final date belongs to the interval.
Weekend rules are supplied by you, not inferred from country.
Optional. Up to 500 dates; dates outside the interval are ignored.

Dates 1900–2100; at most 500 holiday lines. Excludes public-holiday lookup, half days and organisation-specific leave rules. Numeric inputs: absolute value up to 1 trillion. Display values use up to 12 significant digits unless noted; floating-point results are approximate.

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How to use Working Days Calculator

  1. Enter your values and select the applicable mode or units; Load example shows a complete sample.
  2. Select Calculate, then review the result, formula and counting assumptions.
  3. Copy the result or download its CSV. Changing an input clears the previous result.

What this tool does

Counts calendar dates in the chosen interval and excludes selected weekends and your supplied holidays. Duplicate holidays count once; holidays already on weekends are not subtracted twice. No automatic public holiday database is used, so enter your organisation’s actual closure dates.

Supported files, limits & important details

Dates 1900–2100; at most 500 holiday lines. Excludes public-holiday lookup, half days and organisation-specific leave rules. Browser-local processing; no inputs are uploaded or saved. Numeric inputs are limited to an absolute value of 1 trillion. Results are estimates using JavaScript floating-point arithmetic, not certified financial or engineering calculations.

Input limits are enforced before processing. Clear removes your input and result from this page. This tool does not store your input between visits.

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Questions about Working Days Calculator

How do I use Working Days Calculator?

Enter your values and select the applicable mode or units; Load example shows a complete sample. Select Calculate, then review the result, formula and counting assumptions. Copy the result or download its CSV. Changing an input clears the previous result.

Are files or text uploaded when I use Working Days Calculator?

No. Working Days Calculator processes your input in your browser. The tool does not upload your document or text for processing. Keep your original and review the result.

What should I check before relying on Working Days Calculator?

Counts calendar dates in the chosen interval and excludes selected weekends and your supplied holidays. Duplicate holidays count once; holidays already on weekends are not subtracted twice. No automatic public holiday database is used, so enter your organisation’s actual closure dates.

Need help choosing a workflow? Read our practical PDF and file guides. How your data is handled.

Prices & percentages

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Dates & work time

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Units & dimensions

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