About Age Calculator

Our free age calculator helps you find your exact age in years, months, and days, plus your total age in weeks, hours, minutes, and seconds. Whether you're checking eligibility, planning a birthday, or just curious how many seconds you've been alive, our tool gives you instant, accurate results.

Features

• Exact age in years, months, and days
• Total age in months, weeks, days, hours, minutes, seconds
• Live-updating seconds counter
• Next birthday countdown
• Calculate age at any past or future date
• Accounts for leap years and variable month lengths
• 100% free, no signup, no download
• All calculations happen locally in your browser

How It Works

The calculator finds the difference between your date of birth and the target date. It counts complete calendar years, then remaining months, then remaining days. Total values (weeks, hours, minutes, seconds) are computed from the exact millisecond difference.