Age Calculator
Calculate exact age in years, months, and days from birth date. Total days lived included.
How to Use
Enter your values in the fields above and click Calculate to get instant results. All computations run locally in your browser. No data is ever uploaded or stored.
Related Calculators
Exact Age Computation
CalcSolver computes calendar age by subtracting birth date from today, then adjusting month/day borrows so each component stays valid. This gives a true years-months-days breakdown, not just dividing total days.
Years: today.year − birth.year (−1 if birthday not yet reached this year)
Months/Days: adjusted from the last birthday with proper month-length handling
Age Milestones & Context
16: driving permit (many US states) · 18: legal adult in most countries
21: legal drinking age (US) · 25: rental-car threshold drops
62–67: social security eligibility (varies by birth year)
Leap-year babies (Feb 29) technically celebrate on Feb 28 or Mar 1 in non-leap years — the calculator handles this automatically.
Exact Age Calculation
CalcSolver's age calculator determines your exact age in years, months, and days from your birth date to today. It properly handles leap year birthdays (February 29) and varying month lengths — showing accurate results regardless of the date combination.
Someone born on March 15, 1990 is exactly 36 years, 3 months, and 2 days old (as of June 17, 2026). Leap year born individuals (February 29) technically have their birthday on March 1 in non-leap years — the calculator handles this automatically.
Age calculations are needed for: legal age verification, insurance applications, retirement planning, medical records, and milestone tracking. Use CalcSolver's date difference calculator for general date spans and the date calculator for adding days to a date.
Sponsored Content
The following content is provided by our advertising partner and does not affect the calculator experience.
Frequently Asked Questions
How is age calculated exactly?
Age is calculated by finding the difference between your date of birth and the current date. The algorithm compares years first, then adjusts for months and days to give an exact age in years, months, and days.
Does the calculator account for leap years?
Yes, our age calculator correctly handles leap years. If you were born on February 29, your birthday is counted on March 1 in non-leap years for legal purposes.
Can I calculate age in days or weeks?
Yes, our calculator shows your age in multiple formats: years, months, days, total weeks lived, and total days lived.
What is the difference between age and completed years?
Legal age is the number of complete years since your birth date. You become a new age on your birthday, not before. For example, if your birthday is August 20 and today is June 13, you are still the previous age.