Find your exact age in years, months, days — and time until your next birthday.
Calculating exact age involves subtracting the birth date from today's date while accounting for whether the birthday has occurred yet this year. If today is March 15 and someone was born on June 10, 1995, their age is not simply 2026 minus 1995 = 31, because their birthday has not yet occurred this year — their actual age is 30. Our calculator handles this automatically along with edge cases like leap year birthdays (February 29) and calculating age at a specific past or future date.
Age calculators are useful in many practical situations. Official forms and legal documents often require your exact age in years and months. Insurance applications, medical forms, and financial documents frequently need precise age information. Parents use age calculators to track their child's development milestones. HR professionals use them to verify employment eligibility or retirement qualifications. Genealogy researchers use them to understand family history. And sometimes you just want to know exactly how many days old you are — our calculator shows all of these at once.
Leap years add an extra day (February 29) every four years, which can complicate age calculations. People born on February 29 technically only have a "real" birthday every four years. Most legal and official contexts treat February 28 or March 1 as the legal birthday in non-leap years, depending on the country. Our calculator correctly handles leap year birthdays so you always get an accurate result regardless of when you were born.
The age of majority — the age at which a person is legally considered an adult — varies by country. In most countries including the United States, United Kingdom, and Australia, the age of majority is 18. In some US states, certain rights like purchasing alcohol are granted at 21. In South Korea, the age of majority is 19. In Japan it was recently lowered from 20 to 18. Some countries set it as low as 15 or as high as 21 for specific purposes. Knowing your exact age is important for determining which legal rights and responsibilities apply to you.
Here are some interesting ways to think about age and time. The average human heart beats about 100,000 times per day, meaning by age 30 it has beaten approximately 1.1 billion times. A person aged 25 has lived through roughly 9,125 days. The oldest verified human ever, Jeanne Calment of France, lived to 122 years and 164 days. In contrast, some species of jellyfish are considered biologically immortal, capable of reverting to their juvenile state indefinitely. Time and age are fascinating — our calculator helps you see yours in a whole new way.