Age Calculator
Calculate exact age in years, months, and days from a birth date.
About the Age Calculator
This tool calculates exact age — in years, months, and days — between a birth date and any target date (defaulting to today). It handles leap years and varying month lengths automatically, which are easy to miscalculate by hand.
It's useful for official forms, eligibility checks, or simply figuring out precisely how old someone is or will be on a specific date.
How to Use This Tool
- 1Enter the birth date.
- 2Optionally change the 'as of' date if you want age on a date other than today.
- 3The calculator shows the exact age in years, months, and days, plus total days lived.
Frequently Asked Questions
Does it account for leap years?
Yes, the calculation correctly accounts for leap years and varying days per month, so the result is precise rather than an approximation based on 365 days per year.
Can I calculate age as of a future date?
Yes — set the 'as of' date to any future date to see what someone's exact age will be on that day, which is useful for eligibility or milestone planning.
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