Count business days between dates or add business days to a date — weekends and your own holidays excluded.
The business days calculator answers the two questions behind every deadline that must not land on a weekend: how many working days lie between two dates, and what date falls N working days after (or before) a start date. Both modes exclude Saturdays and Sundays, and both let you add your own holidays — enter them as a simple list of dates (YYYY-MM-DD) that is stored only in your browser’s local storage. The count convention is stated on the page: business days are counted from the day after the start date through the end date, so a Monday-to-Friday week is 4 business days unless you enter the Friday as an explicit holiday. The add mode advances by calendar weekdays, skipping weekends and holidays, and supports negative counts for deadlines that precede a date. All calendar math is done with explicit day arithmetic — no floating-point dates, no time-zone ambiguity, because the calculator works with calendar dates only. Everything runs locally in your browser: dates and holiday lists never leave your device and are never logged. Use this calculator for delivery promises, approval timelines, and anything contractual that must count only working days.
Processed locally in your browser
Business days
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Weekend days excluded
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Holidays excluded
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The start day is not counted; the count runs through the end date. The add mode shows the resulting date instead of a count.
An order placed on Friday, August 7, promises delivery in 5 business days. Saturday and Sunday do not count, so the 5th business day lands on Friday, August 14. If Monday were a public holiday, the promise would move to Monday, August 17 — which is why the holiday list matters for real deadlines.
| Input | Value |
|---|---|
| startDate | 2026-08-07 |
| days | 5 |
| Result | 2026-08-14 (skipping the weekend) |
count = weekdays in (start, end], minus holidays
| Symbol | Meaning |
|---|---|
(start, end] | the day after start through end, inclusive of end |
holidays | dates in the holiday list that fall on weekdays |
date = start + N weekdays, skipping weekends and holidays
| Symbol | Meaning |
|---|---|
N | whole number of business days (negative moves backward) |
Last reviewed August 4, 2026 · Version 1.0.0 · Toolivaro does not guarantee external content.
Because the start day itself is not counted — the count runs from the day after the start through the end date. If your convention counts the start day, add one day to the result.
Only in your browser’s local storage on your device. They are never transmitted anywhere, and they stay attached to this site only.
Yes — the add mode accepts negative day counts and moves backward, skipping weekends and holidays in the opposite direction.
Part of Time, date, and scheduling tools
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Reviewed by the Toolivaro editorial team per our methodology Methodology · Editorial policy