How are weekends handled?

Weekend days are skipped and do not count toward the total. You can opt to treat Saturday or Sunday as a business day if your week works differently.

Can I subtract business days?

Yes — enter a negative number and the tool counts backwards, still skipping weekends.

Does it know about public holidays?

No. Only weekends are skipped. Adjust manually for any public holidays in your region.

What counts as a business day?

By default, a business day is Monday through Friday. Saturday and Sunday are treated as non-working days and skipped, though you can toggle either weekend day on to suit a six-day working week.

How is this different from just adding calendar days?

Adding calendar days counts every day including weekends. Adding business days only advances the count on working days, so 5 business days from a Monday lands on the following Monday, not the Saturday.

Can I use this for SLA or delivery deadlines?

Yes. It is ideal for contracts, payment terms, shipping estimates and service-level agreements expressed in working days — just remember to subtract any public holidays manually.

What is the Add Business Days?

Add or subtract a number of business days from any date, automatically skipping weekends. Find the resulting date and weekday instantly. Runs entirely in your browser — nothing is uploaded. It runs free in your browser on Gera Tools, with nothing uploaded.

Add Business Days — Gera Tools

Name: Add Business Days
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

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The Add Business Days calculator finds the date that falls a given number of working days before or after a start date, automatically skipping weekends. It is built for the everyday questions that calendar arithmetic gets wrong: when a 30-day notice period ends in working days, when a payment is due, or when a parcel quoted in business days should arrive.

How it works

Starting from your chosen date, the tool steps one calendar day at a time toward the target. Each day is checked: if it lands on a weekend (Saturday or Sunday by default) it is skipped and does not reduce the remaining count. Only working days decrement the counter, so the result always lands on a business day. Enter a negative number to count backwards. If your working week differs, you can toggle Saturday or Sunday to count as working days. Public holidays are not included — adjust for those manually.

Worked example

Start date: Thursday, 1 January 2026. Add 10 business days.

Calendar day	Day	Business day?	Count
1 Jan	Thu	Yes	1
2 Jan	Fri	Yes	2
3 Jan	Sat	No (skip)	—
4 Jan	Sun	No (skip)	—
5 Jan	Mon	Yes	3
6 Jan	Tue	Yes	4
7 Jan	Wed	Yes	5
8 Jan	Thu	Yes	6
9 Jan	Fri	Yes	7
10 Jan	Sat	No (skip)	—
11 Jan	Sun	No (skip)	—
12 Jan	Mon	Yes	8
13 Jan	Tue	Yes	9
14 Jan	Wed	Yes	10

Result: Wednesday, 14 January 2026.

Common use cases

SLA deadlines — service agreements that specify a 5 or 10 business day response window
Payment terms — “net 30 working days” contracts where the due date matters for cash flow
Notice periods — employment or contract notice expressed in working days
Delivery estimates — courier services that quote transit in business days
Court filing deadlines — some legal deadlines are calculated in business days from the event date

For any deadline with legal or financial consequences, remember to also account for public holidays in your jurisdiction — the tool skips weekends only, so add those manually by using the result date as a new start date and adding the holiday days on top.

Everything runs entirely in your browser — no dates are uploaded.