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About this calculator
The Age Calculator finds exact age from a date of birth to any reference date. It returns a full breakdown in years, months, days, and total age in months, weeks, days, hours, minutes, and seconds.
Exact calendar math
Handles leap years and month-length differences correctly for precise age results.
Age as of any date
Calculate current age or how old someone was—or will be—on a specific milestone date.
Multiple breakdown formats
See age as a phrase plus totals in months, weeks, days, and smaller units when you need detail.
- Forms & eligibility
- Birthday milestones
- Legal age checks
- Event planning
Frequently asked questions
Quick answers about this calculator—how it works, accuracy, and everyday use.
Age is the elapsed time from your date of birth to a reference date (usually today). The calculator counts full years, then remaining months, weeks, and days after accounting for calendar differences including leap years.
Yes. Choose any 'age at' date to find how old someone was or will be on that day. This is useful for forms, eligibility checks, milestones, and legal age requirements.
Yes. In addition to years, months, and days, you can see total age expressed in months, weeks, days, hours, minutes, and seconds for detailed breakdowns.
Yes. The calculator uses calendar-aware date math so February 29 and other leap-day birthdays are handled correctly across year boundaries.