Age Calculator - Calculate Exact Age
Calculate your exact age from date of birth with detailed breakdown. Get years, months, days, next birthday countdown, and zodiac sign.
Enter your birth date
Calculate your age as of this date (default: today)
Account for leap years in precise age calculations
Results
Note: This calculator provides exact age calculations based on calendar dates. Age calculations consider leap years for precise results. Zodiac signs are based on Western astrology. Milestones are general references and may vary by location and culture.
Life Stage Categories
Understanding different life stages and their typical characteristics
Infant & Toddler
Child
Teenager
Young Adult
Middle Age
Senior
Age Calculation Methods
Different ways to calculate and express age across cultures and contexts
Chronological Age
Korean Age System
Lunar Calendar Age
Biological Age
Interesting Age Facts & Statistics
Fascinating insights about age, life expectancy, and human development
Global Life Expectancy
Age Records
Development Facts
Time Perspective
Legal Milestones (US)
Age Psychology
🎉 Fun Age Math
Age Calculator FAQ
Common questions about exact age, leap years, calculate-to dates, and lifetime estimates.
How is exact age calculated?
Exact age is calculated from the birth date to the selected target date using real calendar years, months, and days.
Does the calculator handle leap years?
Yes. Calendar dates are used directly, so leap years and February 29 birthdays are handled as part of the date calculation.
What is the calculate-to date for?
Use the calculate-to date when you want to know someone's age on a specific past or future date instead of today.
Why do total months and calendar months differ?
Total months is a broad elapsed-time count, while calendar age uses year, month, and day boundaries. Both can be useful for different contexts.
Are heartbeat and breath estimates exact?
No. They are rough educational estimates based on typical rates. Real values vary by health, activity level, and many other factors.