Age Calculator

About This Age Calculator

Our free online Age Calculator lets you find your exact age down to the second. Enter your date of birth (day, month, year), click Calculate, and get your age in years, months, and days plus total days, weeks, hours, minutes, and seconds. The seconds counter updates in real time so you can see your age ticking live. Ideal for forms, curiosity, or planning birthdays and milestones.

What You Get

• Age breakdown: Years, months, and days from your date of birth to today
• Total days lived: Exact number of days since you were born
• Total weeks: Your age in complete weeks
• Total hours, minutes, seconds: Full time lived; seconds update live
• Born on: The exact day of the week you were born (e.g. Monday, 15 January 1990)
• Next birthday countdown: Time left until your next birthday in years, months, days, and time

Features

• Instant results: No sign-up, no wait — enter DOB and see results immediately
• Live seconds: Total seconds (and thus age) update every second while results are shown
• Today’s date shown: See the reference date used for the calculation
• Date validation: Handles invalid dates and future dates with clear error messages
• Leap years and month lengths: Correct handling of leap years and different month lengths for accurate totals
• Dark and light theme: Toggle dark mode for comfortable use day or night
• Mobile friendly: Works on desktop, tablet, and phone; no app required
• Privacy first: All calculations run in your browser; no data is stored or sent to any server

How to Use

1. Enter your date of birth: select or type day, month, and year.
2. Click Calculate Age to see your age and all statistics.
3. View your age in years : months : days, total days, weeks, hours, minutes, and live-updating seconds.
4. Check Born on for your birth day of the week and Next Birthday In for the countdown.
5. Use Reset to clear the form and try another date.

Use Cases

Use this Age Calculator for official forms requiring exact age or date of birth, to know how many days or weeks you’ve lived, to find the day of the week you were born, to plan birthday or milestone celebrations with a precise countdown, or simply to satisfy curiosity about your age in different units.

Accuracy and Technology

Calculations account for leap years and varying month lengths (28–31 days). The tool uses your device’s current date and time for “today” and for the live seconds counter. It runs entirely in the browser using JavaScript — no installation, no account, and no data leaves your device.

Privacy and Data

Your date of birth is never stored or uploaded. All processing happens locally in your browser. We do not use analytics or tracking on this tool. Your privacy is fully respected.

Support and Feedback

If you have suggestions, find a bug, or want to share feedback, please visit our contact page. We’re happy to hear from you.