Enter your date of birth to get your exact age in years, months, and days, plus the total number of days you've lived.
Age is the length of time that has passed since a person's date of birth. The simplest and most common way is to count full years, then full months, then remaining days from the last birthday to today.
For example, someone born on June 15, 1995 who is being checked on September 6, 2026 is 31 years, 2 months, and 22 days old, having lived about 11,441 days in total.
Total days lived is useful for a few practical reasons:
| Milestone | Meaning |
|---|---|
| 18 years | Age of majority in most U.S. states; legal adult for most purposes |
| 21 years | Legal drinking age in the United States |
| 26 years | Common cutoff for staying on a parent's health insurance in the U.S. |
| 30 years | Common milestone birthday; many financial goals target this age |
| 50 years | Age when many routine health screenings become recommended |
| 65 years | Medicare eligibility age in the United States |
Some Asian countries historically used a system where a baby is considered 1 year old at birth and everyone gains a year at the Lunar New Year. This "Korean age" or "East Asian age reckoning" differs from the international system, which counts from the actual date of birth.
People born on February 29 usually celebrate their birthday on February 28 or March 1 in non-leap years. For legal purposes, most countries recognize March 1 as the birthday in non-leap years.
Yes. Set one person's date of birth in the "Date of Birth" field and the other person's in the "Reference Date" field. The result shows the exact difference between the two dates.