Age Calculator
Your exact age, down to the day, plus how many days you've been alive and roughly how much of an average life you've used up. Cheerful stuff.
- Age in years, months and days
- Total days alive
- Percentage of an average life lived
How to calculate your age
Subtract your birth year from the current year, then subtract one if your birthday hasn't happened yet this year. For months and days, the calculator borrows from the previous month the same way you would on paper, accounting for month lengths and leap years.
How many days old am I?
Your days alive is the exact count of days from your birth date to today. You turn 10,000 days old at about 27 years and 4 months, a milestone some people celebrate.
Life percentage
Life percentage compares your age with U.S. life expectancy at birth: about 75.8 years for men and 81.1 for women, according to the CDC. For a personal estimate, use the Life Expectancy Calculator.
Comparing two ages?
Use the Age Gap Calculator for couples, or the Anniversary Calculator to count days together.
Frequently asked questions
When will I be 10,000 days old?
About 27 years, 4 months and 17 days after you were born.
How do leap years affect my age?
They add a day every four years. The calculator counts them automatically.
What if I was born on February 29?
Legally, most places treat March 1 as your birthday in non-leap years.