How to calculate your exact age in years, months and days
Quick answer
Count full years first, then full calendar months after the last birthday, then the remaining calendar days. Leap years and different month lengths are why a calendar method is better than a simple division.
Why “days ÷ 365” is not exact
A year may contain 365 or 366 days, and calendar months range from 28 to 31 days. Exact age therefore needs date arithmetic.
Why EgoTools separates exact maths from estimates
Exact date calculations use calendar arithmetic. Estimates are labelled as estimates, and entertainment results are labelled as entertainment rather than presented as scientific population facts.