Calculate an exact age in hours, days and years from a birth date generally.
Your exact age computed to the current moment: total whole hours since birth, equivalent days, and years using the 365.25-day average.
Hours
Hours = now − birth (in ms) ÷ 3,600,000
Uses your device's current time.
The year figure uses 365.25 days per year on average.
Rates are approximate reference values. Local rates, exemptions and rules can differ, so treat the output as a planning figure only.