Age Calculator
Get your exact age in years, months, and days, plus fun date facts. Free to use, no signup required for occasional use.
What is the Age Calculator?
The Age Calculator is a free online tool that computes someone's exact age from a date of birth, broken down precisely into years, months, and days rather than just a rounded number of years. This level of precision is useful for form fields that require an exact age, eligibility checks for age-restricted services, legal or medical documentation, or simply satisfying curiosity about exactly how long you've been alive. Beyond the headline years/months/days figure, the tool also surfaces several fun and genuinely useful facts derived from the same date of birth: your total number of days, weeks, and months lived, which day of the week you were born on, how many days remain until your next birthday, and which birthday number you're about to reach. Calculating this by hand is tedious and error-prone because months have varying lengths and leap years shift day counts, so a small arithmetic slip is easy to make; this tool handles all of that date math correctly, accounting for varying month lengths and leap years automatically. It's popular with parents tracking a child's exact age, people filling out forms with strict age requirements, and anyone curious about milestone facts like their 10,000th day alive.
How to use it
Click into the date field and select or type your date of birth. Once a valid date is entered, click 'Calculate age' and the tool immediately computes your exact age as of today, displayed as a clear 'X years, Y months, Z days' figure. Below that, a set of detail cards shows supporting facts: your total days, weeks, and months lived, the day of the week you were born on, how many days remain until your next birthday, and the age you'll be turning on that next birthday. This is handy for double-checking an exact age for a form, seeing how close you are to a round-number day count milestone, or just satisfying curiosity about your own birth date. If you want to check someone else's age — a child, a colleague, a historical figure — simply change the date field and calculate again; the tool doesn't store any of the dates you enter.
Frequently asked questions
How is age calculated if I was born on February 29th?
The calculator correctly accounts for leap years when computing months and days, so a February 29th birth date still produces an accurate year/month/day breakdown.
Can I calculate someone else's age, not just my own?
Yes, you can enter any past date of birth and the tool will calculate the exact age as of today for that date.
What does 'days until next birthday' mean?
It's the number of calendar days remaining until the next occurrence of your birth month and day, counted from today's date.
Does the tool store the dates I enter?
No, dates are used only to perform the calculation for your current session and are not stored.