Age Calculator

Step 1: Enter your date of birth using the date picker above.

Step 2: Your exact age in years, months, and days appears instantly along with fun stats like total days alive and your zodiac sign.

Tip: Toggle the "Calculate age on a specific date" option to find out how old you were — or will be — on any date.

Throughout life we mark key milestones: 18 (legal adult in many countries), 21 (legal drinking age in the US), 25 (car insurance drop), 30, 40, 50, 65 (retirement age in many systems), and the remarkable 100 (centenarian).

Use the "Calculate age on a specific date" feature to find out exactly when you reach your next milestone!

Knowing your precise age is necessary for legal documents, passport applications, job applications, medical records, insurance policies, and many official forms that require your age in years — and sometimes in months and days.

For health and fitness, age plays a role in calculating target heart rate, BMI-for-age charts, recommended calorie intake, and exercise guidelines. Accurate age data ensures you get the right recommendations.

• Your heart beats roughly 100,000 times per day, meaning by age 30 it has beaten over a billion times.

• A leap year baby (born February 29) technically only celebrates their "true" birthday every 4 years.

• The most common birthday in the world is September 9, while the least common is February 29.

• In South Korea, everyone becomes one year older on New Year's Day, regardless of their actual birthday.