Calculate My Age: Years, Months, Days, and Next Birthday
Learn how to calculate your exact age from your date of birth, including years, months, days, next birthday, and age on a future date.
Searching calculate my age usually means you want more than a rough year count. Your exact age can be shown in years, months, days, total days lived, or age on a specific future date.
Use our free Age Calculator for the fastest result.
Basic Age Formula
The simple version is:
Age = Current date - Date of birth
In practice, you must adjust for whether your birthday has already happened this year.
Example
Suppose someone was born on June 10, 1998, and the calculation date is May 2, 2026.
2026 - 1998 = 28
But June 10 has not happened yet in 2026, so subtract 1.
Age = 27 years old
Exact Age in Years, Months, and Days
Exact age needs date borrowing, similar to subtraction:
- Subtract the day.
- If the current day is smaller than the birth day, borrow days from the previous month.
- Subtract the month.
- If the current month is smaller than the birth month, borrow one year.
This is why an age calculator is easier than doing the full date math by hand.
Age on a Future Date
You can also calculate age on a future date. This is useful for:
- School eligibility
- Retirement planning
- Insurance forms
- Age limits
- Visa or application deadlines
Use the target date instead of todayโs date.
Common Mistakes
Counting only birth year can be wrong if the birthday has not happened yet.
Ignoring time zones can matter near midnight or for official records.
Using total days as exact age is useful, but it is not the same as calendar age in years and months.
The Bottom Line
To calculate your age, subtract your date of birth from the calculation date and adjust for whether your birthday has passed. For exact years, months, days, and next birthday, use the Age Calculator.
How to Calculate: Step-by-Step Guide
Enter your date of birth
Use your birth year, month, and day.
Choose the calculation date
Use today for current age or another date for age on a specific day.
Subtract and adjust
Subtract birth date from calculation date, adjusting months and days when the birthday has not occurred yet.