Free Healthcare Tool
Age Calculator
Calculate completed age in years between a birth date and any comparison date.
What this answers:
- How many full years old is someone, as of a given date?
A February 29 birth date is treated as occurring on February 28 in a non-leap comparison year — one explicitly stated convention, not the only one in use.
Completed age
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How it's calculated
Completed years = the calendar-year difference, minus one if the birthday hasn't occurred yet as of the comparison date.
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