Age Calculator Guides

Complete guide to calculating exact age with different systems and methods.

Find your exact age in years, months, days, hours, and minutes.

Estimate your life expectancy based on country, gender, and lifestyle.

How chronological age works in education, testing, and assessments.

Step-by-step chronological age calculation for clinical and educational use.

Calculate the exact age gap between two people with celebrity examples.

Find out exactly how many days you have been alive since birth.

Your life in weeks, pregnancy tracking, and the 4,000 weeks concept.

Precise age in months for pediatric milestones and development tracking.

Hours alive, the 10,000-hour rule, and how you spend your time.

Your million-minute milestone and daily time breakdown analysis.

Your billion-second birthday, heartbeat count, and more.

Next birthday countdown, day of the week, birthday traditions worldwide.

Historical events by birth year and generational analysis.

Reverse-calculate a date of birth from age, useful for genealogy.

Find your age on any past or future date for passports, weddings, and more.

When your age matches your birth date. Joan Bramsch's 1950s invention.

Celebrating the milestone of turning 75 years old.

Calculate your half birthday and learn about half-birthday traditions.

Born on February 29? Legal treatment, famous leaplings, and celebrations.

Drinking, driving, voting, marriage, and consent ages by country.

Permit and license ages for all 50 US states and 20+ countries.

Voting age history, the 26th Amendment, and 30+ country comparison.

Social Security full retirement age by birth year and global comparison.

COPPA, KYC, and online age verification systems explained.

Kindergarten cutoff dates by state, redshirting, and the relative age effect.

Telomeres, epigenetic clocks, and how your body ages differently than the calendar.

Every major milestone from birth to 100+, including cultural coming-of-age ceremonies.

All generations defined: Boomers, Gen X, Millennials, Gen Z, and Gen Alpha.

Western and Chinese zodiac signs, elements, and cusp dates.

The Korean age system, 2023 reform, K-pop idol ages, and vocabulary.

The sui age system, comparison to Korean age, and the gender prediction chart.

Lunar calendar age, TCM life cycles, and lunar vs. international age.