Utility
Age Calculator
Calculate your exact age in years, months, and days, plus a countdown to your next birthday.
About this tool
An age calculator works out exactly how old you are from your date of birth - in years, months, and days - and counts down to your next birthday. Just pick a date and the result appears instantly. It's handy for forms that ask for an exact age, eligibility checks, milestone planning, or simply settling "how old am I in days?".
What the calculator shows
- Exact age - your age broken down into completed years, months, and days.
- Days lived - the total number of days since you were born.
- Next birthday - how many days remain until your next birthday.
How age is calculated
The tool compares your birth date with today's date, accounting for months of different lengths and leap years, so the day and month counts are accurate rather than rough averages. If the day-of-month hasn't been reached yet this month, it borrows the correct number of days from the previous month - the same way you'd count an age by hand.
Common uses
- Confirming you meet a minimum age for a service or application.
- Working out a child's age in months for school or medical forms.
- Counting down the days to a birthday or anniversary.
Your date of birth is processed entirely in your browser and is never uploaded or stored.
Frequently asked questions
How does the age calculator work?
It compares your date of birth with today's date and breaks the difference into completed years, months, and days, accounting for months of different lengths and leap years.
Does it account for leap years?
Yes. The calculation uses real calendar dates, so leap years and varying month lengths are handled correctly.
Can I calculate age on a future or past date?
This tool calculates your age as of today. The birth date must be in the past; future dates are rejected.
How is "days to next birthday" worked out?
It finds the next occurrence of your birth month and day from today and counts the days until then. On your birthday it shows a celebration message.
Is my date of birth stored?
No. Everything is calculated in your browser and your date of birth is never sent anywhere.
Related tools
Word & Character Counter
Count words, characters, sentences, and reading time, with live limits for X, SEO, and more.
Utility
Password Generator
Generate strong, random passwords with adjustable length and character types. Secure and private.
Utility
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more in one click.
Utility
Percentage Calculator
Work out X% of a number, what percent one number is of another, and percentage change.
Utility