Age calculator
Calculate exact age from birth date.
Guide to Age Calculation
How does the age calculator work?
The age calculator calculates the exact time elapsed from the date of birth to the chosen target date. It calculates the difference in years, months, and days, accounting for the varying number of days in each month. Optionally, you can calculate age for any date in the past or future.
Age and health
Biological age may differ from chronological age. Healthy lifestyle, physical activity, proper diet, and avoiding habits can slow aging. Regular preventive check-ups allow early detection of age-related diseases such as hypertension, diabetes, and cancer.
Age-related milestones
- 18 years - legal adulthood, full citizen rights
- 21 years - legal drinking age in the USA
- 65 years - retirement age in many countries
- 70 years - higher retirement benefits in some systems
- 100 years - centenarian status, special honors
Fun facts about birthdays
The rarest birthday is February 29 - people born on this day celebrate birthdays only every 4 years. On average, each person celebrates 79 birthdays (with average life expectancy of 79 years). In Poland, the most popular birthdays are in fall and winter, while April is the least popular.