Find your exact age in years, months, and days — plus how old you’ll be on any future date. Just enter your date of birth below.
Age Calculator App
How this age calculator works
Enter your date of birth and this tool instantly calculates your exact age down to the day — not just the year. You'll also see how many total days and weeks you've been alive, which day of the week you were born on, and how many days remain until your next birthday.
Want to know how old you'll be on a specific future date, like a milestone birthday or a big event years from now? Use the second field to pick any date and see your exact age on that day.
Why calculate your age this precisely?
Most people only track age in whole years, but knowing your exact age in months and days is useful for legal documents, medical forms, visa applications, and just settling arguments about who's technically older. The future-date feature is popular for planning retirement, figuring out how old you'll be when a child graduates, or simply satisfying curiosity about a big milestone birthday.
Frequently asked questions
Is this age calculator accurate?
Yes. It accounts for leap years and varying month lengths, so the day and month counts are exact, not estimates.
Can I calculate someone else's age, not just my own?
Yes — enter any date of birth, yours or someone else's, to get the same detailed breakdown.
Does this store or save my date of birth?
No. The calculation happens instantly in your browser and nothing is saved or sent anywhere.