Age Calculator: The Complete Guide
Find your exact age from your date of birth. Enter your birthday to see your age in years, months, and days — plus your total months, weeks, and days lived, and how long until your next birthday.
Who the Age Calculator is for
Anyone who needs their precise age for forms, milestones, or curiosity.
How to use the Age Calculator
- Type your values into the fields above — pick your currency or units where the calculator offers them.
- Results update automatically as you type; there's no submit button and nothing is sent to a server.
- Adjust any input to compare scenarios, then copy the result with a single click.
How it works
Age is the calendar difference between your date of birth and today, counted as whole years, then remaining months, then remaining days — accounting for varying month lengths and leap years.
Features
- Exact years, months & days
- Age in months, weeks, days
- Next-birthday countdown
- Always uses today's date
How exact age is counted
Your age isn't just today's year minus your birth year — that ignores whether your birthday has happened yet this year. A proper age calculation counts complete years since birth, then the leftover months and days, adjusting for month lengths and leap years. This calculator does that and updates to the current date automatically.