Calculate your exact age in years, months, weeks, days — or the time between any two dates.
Enter your birth date in the first field, then pick an optional “calculate up to” date if you want the age on a specific day rather than today. The tool instantly breaks your exact age into years, months, weeks and days, so you can use it for forms, visa applications, insurance quotes or milestone planning.
Tip: leave the second field empty to get your current age. The calculator also works backwards — put a future date to see how old you will be at an upcoming event, which is handy for retirement planning or birthday surprises.
The result is exact to the day, which matters for legal documents like driver's license renewals or age-restricted purchases where a single day can change eligibility. You can also use it to calculate service anniversaries or subscription renewal dates.
For event planners, the date-difference mode doubles as a countdown calculator: enter a launch date or wedding day to see exactly how many days remain. The output updates instantly as you change dates, making it easy to compare scenarios side by side without recalculating.
An age calculator is useful in many everyday situations: checking eligibility for a driver's license or voting, calculating retirement dates, tracking a baby's development in weeks, or figuring out how old you'll be on a future date. It can also calculate the age difference between two people or the exact time elapsed between two significant life events.
Age is calculated by comparing the birth date to the target date, accounting for differences in years, months, and days. If the day of the target date is earlier in the month than the birth day, months are borrowed from the year.
Yes. Set your desired start date as the "birth date" and any future or past date as the target to calculate exact time elapsed.
Yes. JavaScript's Date object handles leap years, February 29, and all calendar edge cases automatically.
No. All calculations happen entirely in your browser. Nothing is sent to any server.