Calculator Soup Date Calculator vs BusinessDayCalculator.org

Last reviewed: October 14, 2026

Calculator Soup's Date Calculator adds or subtracts days from a date. Tick Business Days Only and it counts Monday to Friday; a second checkbox counts Saturday as a business day too, for a six-day week. No account is needed, and its page offers the calculator for use on other websites. For date arithmetic that can ignore holidays, that is all you need, and it is worth saying up front.

The gap shows up the moment public holidays enter the picture. Calculator Soup's page says holidays are not included in its calculation and that you have to extend the final date yourself by however many holidays fall in the span; for reference it links to the US federal holiday list and the NYSE's market holidays. Its options also include no Friday-Saturday or Sunday-Thursday weekend. Those are exactly the gaps this site fills.

The holiday difference, concretely

Say you add 10 business days to a US date that spans a federal holiday. Calculator Soup returns a weekday-only result, then expects you to know the holiday is there and push the date out by one more working day. Miss it and the deadline is wrong by a day. Here, the holiday is removed automatically once you pick the country, so the answer is right without a second mental step. That single difference is why a holiday-aware calculator matters for invoices, filings, and SLAs, where a one-day error has consequences.

Feature comparison

Calculator Soup Date Calculator vs BusinessDayCalculator.org. Calculator Soup details read from its Date Calculator page on 9 October 2026 (linked below).
Feature	Calculator Soup	BusinessDayCalculator.org
Cost / account	No account needed to use it	Free, no account or sign-up
Add or subtract days	Yes, with a business-days-only option	Yes, business days built in
Saturday as a business day	Yes, optional checkbox (six-day week)	Handled by the country's working week
Automatic public holidays	No; its page says to extend the date by hand	Yes, built in for 25 countries
Country-specific holiday lists	None; its page links to the US federal (OPM) and NYSE holiday lists	25 countries plus 88 sub-national regions
Custom weekend (Fri-Sat, Sun-Thu)	Not among its options; only the Saturday checkbox	Yes, set automatically per country
Payment-term tools (Net 30/60/90, invoice)	Not on its date calculator page	Dedicated calculators
Embed on your own site	Yes; its page offers the calculator for other websites	Yes, free iframe widgets for 18 calculators

Try a holiday-aware count

Count working days with public holidays removed using the business days between dates calculator, or add a deadline with add business days. For billing, the invoice due date calculator applies the holiday rules for you. Put any of them on your own site with a free embed widget, and see more side-by-sides on the alternatives hub.

Vendor pages these entries were read from

Date Calculator: Days and Business Days (CalculatorSoup)

Checked October 9, 2026. All sources

Frequently Asked Questions

Does Calculator Soup's date calculator account for public holidays?

No. Its Date Calculator excludes weekends when you tick Business Days Only, but it does not remove public holidays. The page itself says holidays are not included and that you must extend your final date by the number of holidays in the span. That manual step is the main practical difference from a calculator with holidays built in.

Can Calculator Soup handle a Friday-Saturday or Sunday-Thursday weekend?

Not directly. It offers a checkbox to treat Saturday as a business day, which covers a six-day Monday-to-Saturday week, but there is no option for a Friday-Saturday or Sunday-Thursday weekend. For those working weeks you need a tool that lets you define the weekend, which is handled here automatically by choosing the country.

What does Calculator Soup's date calculator do?

Plain date arithmetic. It adds or subtracts days from a date, optionally counting weekdays only or Monday to Saturday, takes dates in three formats (mm/dd/yyyy, dd/mm/yyyy and yyyy-mm-dd) and can repeat the same interval to build a schedule of recurring dates. Its page also offers the calculator for use on other websites. If you do not need public holidays or an unusual weekend, that covers the question.

When should I use BusinessDayCalculator.org instead?

When holidays matter. This site removes public holidays automatically for 25 countries and 88 sub-national regions, applies each country's own working week, and adds payment-term tools such as Net 30, Net 60, Net 90 and invoice due dates. Results can be shared as a link, and 18 of the calculators can be embedded on another site.