Age Calculator
Calculate exact age in years, months and days.
This tool runs entirely in your browser. Your files are never uploaded to a server.
26
Years
8
Months
15
Days
9755
Total days
Enter a birth date and an As of date to see a calendar-style years, months and days breakdown plus total elapsed days. The calculator subtracts date components and borrows the length of the month before the reference date when the day difference is negative; total days comes from the rounded millisecond difference divided by 24 hours. The birth date must not be later than the reference date. Month-end cases, browser date parsing and daylight-saving transitions can produce edge cases, so do not use the result alone for legal or eligibility decisions.
Frequently Asked Questions
- How is age calculated?
- It subtracts calendar components, borrowing days from the month before the reference date when needed, and separately derives total days from elapsed milliseconds. Review month-end edge cases.
- Can I calculate age as of a specific date?
- Yes, change the 'as of' date to any date in the past or future to see age at that point.
- Does it account for leap years?
- Yes, the calculation uses actual calendar dates, so leap years are handled automatically.