Calculate your exact age in years, months, weeks, days, hours, minutes, and seconds. Discover your zodiac sign, planetary age, and compare age differences.
Chronological age is calculated by finding the exact time elapsed between your date of birth and the current date (or a specific target date). Our calculator counts the completed years, then the remaining completed months, and finally the days, ensuring high precision.
Yes, our age calculator fully accounts for leap years. It automatically factors in 366 days for leap years (including the extra day on February 29th) to provide 100% accurate results down to the exact days, hours, and minutes.
To calculate the age difference, determine the dates of birth for both individuals. Subtract the older person's birthdate from the younger person's birthdate. You can use our integrated 'Compare Age' tab to instantly calculate this difference in years, months, days, and total days.
Chronological age is the exact number of years, months, and days since you were born. Biological age refers to how old your cells and tissues look physically, which is determined by genetics, diet, exercise, stress, and lifestyle.
Planetary age is calculated by dividing your total age in Earth days by the orbital period of another planet. For example, since Mercury orbits the Sun in approximately 87.97 Earth days, your age in Mercury years is much higher than your Earth age.
Western cultures calculate age based on birthdays (starting at age 0 at birth and turning 1 after exactly one year). In contrast, traditional East Asian systems (like the traditional Korean age) consider a baby to be 1 year old at birth and add a year to everyone's age on New Year's Day.
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