🎂 Age Calculator
Find your exact age in years, months, and days.
How Age Is Calculated
This calculator finds the exact difference between your birth date and the reference date (today by default), accounting for varying month lengths and leap years to give you precise years, months, and days.
Guide: understanding your result
- Age in years counts completed birthdays; if this year's birthday has not arrived yet, subtract one from the difference in years.
- People born on February 29 reach their legal birthday in non-leap years on February 28 or March 1 depending on the jurisdiction and purpose.
- Age in days counts every calendar day, including leap days.
Worked example
Someone born on March 15, 1990 is 36 years, 7 months and 30 days old on November 14, 2026, and has lived 13,393 days.
Common US age milestones
| Milestone | Age |
|---|---|
| Vote in federal elections | 18 |
| Purchase alcohol or tobacco (federal minimum) | 21 |
| Medicare eligibility (most people) | 65 |
| Social Security full retirement age (born 1960 or later) | 67 |
| Required minimum distributions begin (current rules) | 73 |
Rules can change; check the official source for decisions.
Common mistakes to avoid
- Subtracting birth year from the current year without checking whether the birthday has passed.
- Ignoring time zones for births near midnight when an exact date matters legally.
Frequently asked questions
How do I count age in months?
Count completed months between the birth date and today; the calculator also shows the remaining days.
Official sources
Examples are calculated live from the same data the calculator uses and are for education only — they are not financial, tax or investment advice.
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See all →✔ Reviewed by GelirLab Editöryal Ekibi · How we check our calculators