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Business Day Calculator
18 free deadline calculators, holidays in 25 countries
Business Day Calculator is a set of 18 free tools for counting working days, Net 30/60/90 due dates, SLA deadlines, and project timelines. Public holiday calendars for 25 countries, shareable result links, and every calculator is embeddable on your own site.
Hello Product Hunt
I built Business Day Calculator because I kept doing the same annoying math by hand. If an invoice goes out on a Thursday with Net 30 terms, when is it actually due? Does that land on a bank holiday? What if my client is in Germany and I am not?
Most date tools answer the easy question and stop. This one handles the messy version.
What is in it:
• 18 calculators covering working days between dates, add and subtract business days, Net 30/60/90, SLA deadlines, invoice due dates, project timelines, late payment interest, working hours, and time zone overlap
• Public holiday calendars for 25 countries, including the US, UK, Canada, Australia, Brazil, China, Egypt, India, Japan, Mexico, the Philippines, Saudi Arabia, the UAE, and Vietnam
• Shareable result URLs, so you can send a colleague the exact calculation instead of a screenshot
• Available in English, German, and Spanish
The part I am most excited about is the embed system that just shipped. Every calculator can be dropped into any blog post, help doc, or intranet page with one iframe snippet. No account, no API key, no rate limits. If you write about payment terms, contract deadlines, or project scheduling, an interactive calculator beats a static example every time. Grab a snippet at businessdaycalculator.org/embed
No sign-up, no paywall, no data collection beyond basic analytics. It is free and it stays free.
I would love feedback on two things specifically. First, which country holiday calendar should I add next? Second, if you run a site and would embed one of these, what is missing that would make you actually do it?
I will be here all day answering. Thanks for taking a look.
Barron
genuinely useful set of tools, the embed option alone makes it stand out. one thing though, it would be great if the calculators could sync with google or outlook calendars so deadlines automatically show up where you already live. right now you still have to copy results over manually which kind of defeats the convenience angle.
One thing that would make this way more useful for me is the ability to set custom recurring holidays for specific companies, since internal "no-meeting Fridays" or company shutdown weeks throw off every deadline calc.
The Net 30 calculator saved me from a tedious spreadsheet habit. Liked that the holiday toggle actually works for smaller markets like Singapore, which most tools ignore.
Would love to see a recurring holiday rule for "the 3rd Monday of January" type definitions so we don't have to manually update regional calendars every year. Also a way to export an entire project's working-day timeline as a CSV would make reporting way smoother.
Would love to see a calendar view that visually highlights weekends and holidays on a single timeline, so I can drag a deadline across days and instantly see how many business days it spans. Right now the number output is great but a visual planner mode would make scheduling much easier for longer projects.
It would be really helpful if the calculator could factor in partial working days, like when a task only takes 3 hours and you want to roll it into the next day's count. Right now it seems all or nothing, but most of our projects run on mixed schedules.
The embeddable calculator widget is a smart move, makes it easy to drop these right into a client portal without extra dev work.
About Business Day Calculator on Product Hunt
“18 free deadline calculators, holidays in 25 countries”
Business Day Calculator was submitted on Product Hunt and earned 14 upvotes and 15 comments, placing #160 on the daily leaderboard. Business Day Calculator is a set of 18 free tools for counting working days, Net 30/60/90 due dates, SLA deadlines, and project timelines. Public holiday calendars for 25 countries, shareable result links, and every calculator is embeddable on your own site.
Business Day Calculator was featured in Web App (123k followers), Productivity (656.8k followers) and Finance (6.1k followers) on Product Hunt. Together, these topics include over 189.9k products, making this a competitive space to launch in.
Who hunted Business Day Calculator?
Business Day Calculator was hunted by Barron Hansen. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Barron Hansen