Calculate your exact age in years, months, and days. Find out how old you are, how many days you've lived, and when your next birthday is.
Age calculation explained
Age calculation finds the exact time elapsed between your birth date and today — in years, months, and days. While it seems simple, the calculation must account for leap years, different month lengths, and whether your birthday has passed yet this year. Knowing your exact age matters in many situations: official documents and ID, retirement planning, legal eligibility (driver's license, voting), insurance premiums, and school enrollment. Some countries even use different conventions — in South Korea, everyone starts at age 1 at birth. Fun age facts: The average human lifespan is about 28,000 days (76 years). You spend roughly 1/3 of your life asleep. One year is actually 365.25 days on average, thanks to leap years. Seeing your age in days or hours puts the value of time into sharp perspective.
Find answers to common questions
If you were born in 1990, you are 35 years old in 2025 (or 34 if your birthday hasn't occurred yet this year). Enter your exact birth date above to get your precise age in years, months, and days.
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