Find your exact age in years, months, and days — or count down to any future date. This calculator runs entirely in your browser, so nothing you enter is ever uploaded or stored anywhere.
How This Age Calculator Works
Enter your date of birth and, optionally, a target date (defaults to today). The calculator instantly works out your exact age in years, months, and days, plus the total number of days you’ve been alive — all calculated locally in your browser. Want to see the math behind it? Read our guide: How to Calculate Your Age From Date of Birth.
Frequently Asked Questions
Is this age calculator accurate?
Yes. It accounts for varying month lengths and leap years to give you an exact breakdown in years, months, and days.
Can I calculate my age on a future or past date?
Yes. Change the “Calculate age as of” field to any date to see your age at that point in time, past or future.
Is my birth date stored anywhere?
No. This tool runs entirely in your browser — nothing is sent to a server or stored anywhere.
