Age Calculator
Calculate your exact age in years, months, days, hours, and minutes.
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Your data stays private - we don't store your calculations
How the Age Calculator Works
This calculator determines your age based on your date of birth and the current date (or a specific past/future date).
- Years: Full years elapsed.
- Months & Days: Remaining duration after full years are counted.
- Total Days: The absolute number of days you've been alive.
Did you know?
In South Korea, people used to be considered 1 year old at birth and gained a year on New Year's Day. This "Korean Age" system was officially abolished in June 2023.
The Math Behind It
Age is determined by calculating the chronological span of years, months, and days elapsed between your birth date and the current or target date.
AgeYour current age (in years, months, and days)
T_currentThe current reference date
T_birthYour date of birth
Manual Calculation Example
Let's calculate the age of a person born on January 1, 2020, as of January 10, 2026.
1
Subtract Years
Find the total number of full years elapsed between the two dates.
2026 - 2020 = 6 Years
2
Calculate Months and Days
Measure the remaining duration after the full years are counted.
January 1 to January 10 = 0 Months and 9 Days
3
State Final Age
Combine the years, months, and days for the exact age.
6 Years, 0 Months, and 9 Days
Frequently Asked Questions
How do I calculate my exact age?
Enter your date of birth into the calculator. It will automatically calculate your age in years, months, and days based on the current date or any date you specify.
How many days old am I?
The calculator shows your age in total days as well as broken down into years, months, and days. This includes accounting for leap years.
Can I calculate age between two dates?
Yes! You can enter any two dates to find the time elapsed between them, not just from your birthday to today.
How are leap years handled in age calculation?
The calculator accounts for leap years automatically. February 29th is properly handled, and total day counts include all leap days between the dates.
What is chronological age vs biological age?
Chronological age is your actual age in years since birth (what this calculator shows). Biological age refers to how old your body appears based on various health markers.
How do I calculate age for legal purposes?
For legal age verification, the calculation is typically based on whether you have reached a specific birthday. For example, you are legally 18 on your 18th birthday, not before.