How to Calculate Your Age Manually
You can calculate your age manually by comparing your date of birth with today’s date.
Step 1: Subtract your birth year from the current year. For example, if you were born in 1990 and the current year is 2026, the initial result is 36.
Step 2: Check whether your birthday has already occurred this year. If it has, keep the result. If your birthday is still coming up, subtract one year.
Step 3: Calculate your final age. For example, someone born on December 15, 1990, would be 35 years old on November 5, 2026, because their birthday has not yet occurred.
Step 4: For a more detailed result, use the Age Calculator above. It calculates your age in years, months, and days, your total days alive, and the number of days until your next birthday.