Age Calculator
Exact age, days alive, and the birthday countdown.
—Exact age
—Days alive
—Next birthday
Calculated on your device — birthdays aren't collected.
Common questions
How is exact age calculated?
By walking the calendar from your birth date: full years first, then full months, then the leftover days — the same way age is reckoned legally. The "as of" date defaults to today but can be set to any date ("how old was I when…").
What about leap-day birthdays?
Born February 29? In non-leap years the calculation treats March 1 as the anniversary — the most common legal convention. You still only get real birthdays every four years; our condolences.
What's the days-alive number for?
Mostly perspective — 10,000-day milestones sneak up on people (it lands a bit past your 27th birthday). It's the exact count from birth date to the as-of date.