Enter a date of birth and an "as of" date to calculate an exact age broken down into years, months, and days, along with the total number of days lived. The reference date defaults to today but can be set to any date.
Useful for birthdays, eligibility checks, anniversaries, and precise date-difference calculations — computed instantly and privately in your browser.
How is age calculated?
As the exact difference between the birth date and the reference date, broken into years, months, and days.
Can I calculate age on a past or future date?
Yes. Set the “as of” date to any date; it defaults to today.
Does it account for leap years?
Yes. The calculation uses real calendar months and leap years for accuracy.
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