Chronological age is simply the number of years, months, and days that have passed since you were born. It's what you write on forms and what AgeCalc Pro calculates for you instantly.
Biological age, on the other hand, is an estimate of how old your body appears to be based on physiological markers like cellular health, organ function, and lifestyle factors.
While AgeCalc Pro focuses on precise chronological age calculations, understanding the difference can help put your calculated age into a broader health context.