Total months
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Date Utility
Age Calculator
Calculate exact age from a date of birth to today or any other comparison date. Use it for forms, planning, and fast date math without manual counting.
Enter a birth date to see exact calendar age in years, months, and days, plus the total time span in months, weeks, and days.
Total weeks
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Total days
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How this age calculator works
The tool measures the exact calendar difference between the birth date and the selected comparison date. It first counts full years, then full months, then the remaining days so the output matches how age is normally expressed in real life.
Frequently asked questions
How is age calculated?
This calculator measures the calendar difference between the birth date and the comparison date, then breaks it into full years, remaining months, and remaining days.
Can I calculate age on a past or future date?
Yes. Change the comparison date to find age on any valid date after the birth date.
Why do months and days matter?
Exact age is often needed for forms, eligibility checks, school records, and planning where a simple year count is not precise enough.
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