Age Calculator — Exact Age, Next Birthday Countdown & Zodiac Sign (HTML/CSS/JS)

Find out your exact age in years, months and days — plus your next birthday countdown, the day of the week you were born, and your zodiac sign — all in one clean, mobile-friendly page. Just enter your date of birth and get instant results. 100% free, no sign-up, and your dates never leave your browser.

Perfect for checking your age for exam forms, job applications, birthdays, or just for fun. Works on mobile and desktop, with Indian-friendly dd/mm/yyyy input and en-IN number formatting.

Features

• Exact age in years, months and days — calendar-accurate, not an approximation
• Total time lived — total days, weeks, months and hours at a glance
• Next birthday countdown — days left, the date, and the age you will turn
• Born-on weekday + zodiac sign — the day of the week you were born and your Western zodiac sign with its date range
• Age on a specific date — pick any target date to see how old you were (or will be) on that day; ideal for forms and exams
• Leap-day (29 Feb) handling — leap-day birthdays age correctly, with next birthday shown as 28 Feb in non-leap years and an explanatory note
• Copy result + print-friendly card — copy a clean text summary or print the result card

What's Inside

• index.html — page structure and form
• style.css — all styling, mobile-responsive
• app.js — all logic (age math, zodiac, countdown, copy/print)
• README.txt — setup and usage guide, including the leap-day note

How to Use

1. Download the ZIP and extract it anywhere — no installation, no server, no database.
2. Open index.html in any modern browser, or upload the files to any static host.
3. Enter your date of birth (date picker or dd/mm/yyyy), optionally pick a target date, and click "Calculate My Age".

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