Age Calculator
Enter your date of birth and see your exact age in years, months and days — plus totals for months, weeks and days lived.
Your details
Your age
How to use this calculator
- 1
Enter your date of birth.
- 2
Read your age in years, months and days as of today.
- 3
Use the breakdown for total months, weeks and days when you need a finer count.
Understanding your results
Age is counted from your birth date to today’s local calendar date. Months and days account for different month lengths, so the result is a calendar age, not a fixed 30-day approximation. Total days use a simple day difference for convenience. For an age or elapsed-time calculation ending on another date, use the Date Difference Calculator.
Frequently asked questions
Does this use today’s date automatically?
Yes. The calculator compares your birth date with the current local date in your browser.
Why can month and day counts look different from “years × 365”?
Calendar months have 28–31 days and leap years add an extra day. Exact age uses calendar arithmetic; total days uses elapsed midnights.
Can I calculate age on a future or past reference date?
This version always measures against today. For custom ranges, use the Date Difference Calculator.
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Disclaimer
CalcPilot's results are estimates for everyday and planning use. Verify critical decisions with an authoritative source. Review our calculation methodology and full disclaimer.