about

AgeCalculator.blog is a small, focused collection of 34 date and age calculators — one calendar-interval engine, applied to the questions people actually search for: how old am I, how far along is a pregnancy, when does a lease or a pension eligibility date land, how old is that dog in human years.

Why calendar math, not shortcuts

Every calculation on this site works from real calendar dates rather than fixed-length approximations (like assuming every month is 30 days). That means correct handling of leap years, the century leap-year exception, and calendar month-borrowing — the same rules a spreadsheet DATEDIF function or a civil registry uses.

How it’s built

Every calculator runs entirely in your browser using JavaScript. No date you enter is transmitted to, logged by, or stored on any server — the result is computed on your device and stays there.

Standards referenced

Interval calculations follow ISO 8601 duration conventions with full leap-year correction. Where a tool touches a domain with an official standard — pregnancy dating conventions, retirement-age tables, and similar — that convention is named on the relevant page.

Questions or corrections

If you spot a calculation that looks wrong, or a convention that should be cited differently, reach out via the contact details on this site and it will be looked into.