Current age
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Total weeks lived—
Total days lived—
Total hours lived—
Next birthday—
Days until next birthday—
Calculate exact age from a birth date — in every unit, plus how long until your next birthday.
Beyond the standard years/months/days figure, this calculator converts your exact age into weeks, days, and hours lived, and separately counts down to your next birthday — useful for milestone planning as well as simple curiosity. All values update together from the same birth date, so they stay consistent with each other.
age = today − birth date, normalized to Y / M / D, then re-expressed in weeks / days / hours; next birthday = nearest future occurrence of your birth month and day