Workdays (Business Days) Calculator
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Count business days between dates and add/subtract workdays. Optional custom holidays. Everything runs locally in your browser.
1) Workdays Between Two Dates
YYYY-MM-DD format, one per line. Invalid lines are ignored.2) Add / Subtract Workdays
About This Workdays Calculator
This tool helps you quickly count workdays (business days) between two dates and add or subtract a number of workdays from a base date. By default it counts Monday–Friday and skips weekends, with optional toggles for Saturday and Sunday if your workweek is different.
You can paste custom holiday dates to exclude them from the count or when stepping through days. Everything runs locally in your browser for speed and confidentiality—no uploads, no tracking.
Calculations use midnight UTC to avoid daylight-saving surprises. Results are shown in ISO format
(YYYY-MM-DD) for clarity and easy copying into spreadsheets or documents.
Tip: use the Set Today shortcut to prefill date fields with today’s UTC date.
Workdays Calculator: FAQs
How are workdays determined?
By default, workdays are Monday–Friday. You can choose to treat Saturday and/or Sunday as workdays with the toggles.
What about holidays?
Paste holiday dates (one per line) and they’ll be excluded when counting or adding workdays. No data leaves your device.
Is the counting inclusive?
You can choose Inclusive (count both start and end) or Exclusive (exclude start). For adding/subtracting, the base date is not counted unless the stepping lands on it after moving.
Does it handle leap years?
Yes. All calculations are UTC-based and correctly handle leap years.