About Weeks Calculator Pro

Weeks Calculator Pro is a privacy-friendly collection of week number, ISO calendar and date calculation tools built for people who need quick, accurate planning references.

Our purpose

The site was created to answer common date questions without unnecessary complexity. Users can check the current week, browse week numbers by year, calculate weeks between dates, add weeks to a date and learn how ISO week numbers work.

Accuracy and editorial standards

Calendar calculations follow the ISO week system: weeks start on Monday, end on Sunday, and week 1 is the first week with at least four days in January. Content is written in plain English and reviewed for clarity before being published.