Free Age Calculators

Four small, copy-ready HTML/JS tools: DOB → Age, Age Difference, Days Lived, and Countdown to Next Birthday. Paste into your blog or open locally.

DOB → Age (years, months, days)

Date of birth

Enter a date and click Calculate.

Age difference between two dates

Earlier date Later date

Enter two dates and click Calculate.

Days lived (exact)

Date of birth

Enter a DOB and click Calculate.

Countdown to next birthday

Your date of birth

Enter a DOB and click Show Countdown.

---

Copy-ready embed snippet

Use this small iframe snippet to include the whole tool page in another site (make sure the file is hosted).

<iframe src="/path/to/free-age-calculators.html" style="width:100%;height:680px;border:0;border-radius:8px;" title="Free Age Calculators"></iframe>

All tools are client-side JavaScript and run in the user's browser — no server required. Good for privacy and offline use.