Age Calculator
Enter your date of birth to discover your exact age down to the day, plus your total number of days lived.
Four-digit year (e.g. 1996)
Month number (1 = January, 12 = December)
Day of the month
Frequently Asked Questions
How accurate is this age calculator?
This calculator calculates your exact age down to the day by accounting for leap years and the exact number of days in each month. The total days lived figure is based on the Gregorian calendar and is accurate for dates after 1582 when the modern calendar was adopted.
Does the calculator account for leap years?
Yes. The calculator counts every leap year in your lifetime — years divisible by 4, except centuries not divisible by 400. This adds an extra day to your age calculation on or after each leap year birthday.
What is the difference between age in years and age in days?
Age in years counts your full birthdays, which is how old you are officially. Age in days gives the total count of days you have been alive, which is higher than simply multiplying years × 365 because it includes leap year days. This total is sometimes used in legal, medical, or statistical contexts.
What is ordinal age?
Ordinal age (like '25th birthday') tells you which birthday you are approaching. The calculator shows your next upcoming birthday in ordinal form, which is useful for planning birthday celebrations or milestone events.