Free Tool · Everyday
Free Age Calculator
Find your exact age in years, months, and days, plus how long until your next birthday. Enter your date of birth to get started.
Enter your date of birth
Leave blank to use today's date.
Calculation basis
Calendar-aware age calculation
The tool compares the birth date with the selected reference date using actual calendar years, months and days. It also calculates the next birthday and total elapsed days.
Calculation flow
Source & scope
Standard Gregorian calendar date arithmetic; no external regulatory source is required.
Assumptions & limits
- The birth date must be on or before the reference date.
- The calculation uses the browser’s date handling and calendar rules.
- Total days are elapsed calendar days between the two dates.
Why this tool is different
Instead of dividing days by 365, it preserves calendar months and days so the displayed age is meaningful.
Common questions
Age Calculator FAQ
How do I calculate my exact age?
Enter your date of birth and this tool will calculate the exact difference between that date and today (or any date you choose), broken down into years, months, and days.
Why does my age in months differ from multiplying years by 12?
Calendar months have different lengths, so an exact age calculation accounts for the actual number of days in each month between your birth date and today, rather than a flat 30-day average.
Can I calculate age as of a future or past date?
Yes. Use the optional "as of" date field to calculate age at any point in time, such as a visa application date, a contract start date, or a school enrollment cutoff.
How many days old am I?
This calculator shows your total days lived as part of the result, calculated as the exact number of days between your date of birth and the selected reference date.