Math
Age Calculator
Calculate your exact age in years from your birth year.
Age
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How It Works
Subtract birth year from current year for approximate age. For exact age including months and days, use a full date comparison.
Example
Someone born in 1990 in 2025 is approximately 35 years old.
Frequently Asked Questions
How do I calculate age in months?
Multiply years by 12, then add remaining months. A 2-year 3-month old person is 27 months old.
What is the legal age of majority?
In the US, age 18 is the age of majority in most states for voting, signing contracts, and military service.
How do I calculate a dog's age?
The '7 dog years = 1 human year' rule is oversimplified. Smaller dogs age more slowly. A 2-year-old large dog is roughly equivalent to a 42-year-old human.