
Developer documentation that anyone can edit

CountBusinessDays
Date Calculator Pro
Day-Number
Days Calculator
DayToDayCount
Calculate business days between dates, add or subtract working days, and plan notice periods. 5 free tools, 100+ countries, no signup needed.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | opendevdocs.com | workingdayscalc.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from South Africa · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Open Devdocs yet.
WorkingDaysCalc.com gives you five free business day calculators. Count working days between two dates, add or subtract business days, work out a notice period end date, or calculate a deadline. Each calculator excludes weekends and public holidays for over 100 countries. Your result reflects...
What each product offers, as listed by its team.


No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of Working Days Calc yet.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Open Devdocs and Working Days Calc.
Working Days Calc's answer:
Most business day calculators are built for one country. WorkingDaysCalc.com covers 100+ countries using a live public holidays database, so the result changes based on where you are. Five separate calculators handle the most common tasks: counting days between two dates, adding or subtracting business days, calculating a notice period end date, and finding a deadline. No signup, no account, no download.
Working Days Calc's answer:
The main alternatives are either US-only, buried inside a larger tool, or so cluttered with ads that finding the result takes longer than counting by hand. WorkingDaysCalc pulls live public holiday data for each country rather than using a hardcoded list that goes stale. The five calculators cover the specific tasks people search for rather than forcing one generic tool to do everything.
Working Days Calc's answer:
HR teams checking notice periods and last working days. Payroll teams confirming payment dates. Legal teams counting court or contract deadlines. Project managers working out delivery windows and milestones. The site gets traffic from the US, UK, Australia, South Africa, and Canada, which reflects where business day calculations come up most in employment law and contract work.
Working Days Calc's answer:
I got a notice period calculation wrong. Counted four weeks forward, told someone their last working day, then spotted a public holiday sitting in that range. Wrong date. In employment and legal contexts, that error has real cost. I looked for a tool that handled multiple countries with accurate holiday data and found nothing that did it cleanly. So I built five calculators that do exactly that and launched the site in June 2026.
Working Days Calc's answer:
WordPress with the Astra theme handles the site structure. Rank Math manages SEO. WPCode handles custom schema and JavaScript snippets. LiteSpeed Cache runs on Hostinger shared hosting. The calculator logic is vanilla JavaScript. Country dropdowns use TomSelect. Public holiday data comes from the Nager.Date API, which covers 100+ countries and requires no API key.
Working Days Calc's answer:
WorkingDaysCalc is a free public tool with no accounts or paid plans, so there are no named customers to list. It gets used by HR professionals, payroll teams, legal staff, and project managers across the US, UK, Australia, South Africa, and Canada.
Share your experience with using Open Devdocs and Working Days Calc. For example, how are they different and which one is better?