Free age calculator to find your exact age in years, months, days, and hours. Calculate age from any birthdate with precision.
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Ever wondered exactly how old you are—down to the day, hour, or minute? Our age calculator gives you precise results from any birth date. Perfect for birthday planning, milestone celebrations, or just satisfying your curiosity about the passage of time.
Age calculation seems simple but has nuances. Your age in years changes on your birthday, but your exact age in days changes daily. Different cultures calculate age differently—in Korea, you're 1 at birth and everyone ages on New Year's Day. Western age calculation starts at 0 and increments on each birthday. Legal age requirements often specify exact dates, making precise calculation important for milestone events. Exact day counts follow the Gregorian calendar's leap-year rule — years divisible by 4 are leap years, except centuries not divisible by 400 (2000 was a leap year; 1900 wasn't) — which is why leap-day birthdays need special handling.
Age Calculation
Count down to milestone birthdays or plan celebrations with exact timing.
Verify eligibility for age-restricted activities, voting, retirement, and more.
Track your baby's age in weeks and months during the crucial early years.
Calculate how old historical figures were at various events or achievements.
Get your exact age in years, months, days, hours, and even minutes.
Find out exactly when you'll hit 10,000 days old or other fun milestones.
Confirm ages for legal documents, forms, and applications that require precision.
People born on February 29th legally age on February 28th or March 1st in non-leap years, depending on jurisdiction. Some places consider them to have their birthday on February 28th, others on March 1st. Our calculator handles this accurately.
In Korea's traditional system, you're 1 at birth (counting time in the womb) and everyone ages one year on New Year's Day, not their birthday. So a baby born in December would be 2 in Korean age just weeks later. Korea officially switched to international age in 2023.
At 1 year: ~365 days. At 10 years: ~3,652 days. At 21 years: ~7,670 days. At 30 years: ~10,958 days. At 50 years: ~18,262 days. The 10,000-day milestone occurs around age 27 years and 5 months.
Enter your date of birth and this calculator shows your next birthday's date, the exact number of days until it, and the age you'll be turning. It counts from today, so the countdown updates automatically each day — handy for planning celebrations or milestone birthdays.