Date & Time calculator
Age Calculator
Calculate calendar age in years, months, and days.
How the calculation works
Calendar components are subtracted with borrowing for incomplete months and years.
Example: Choose a birth date and a later target date to calculate completed calendar age.
Important limitations
This tool provides a mathematical estimate based only on the values entered. It does not account for regulations, taxes, lender fees, medical circumstances, structural requirements, or other project-specific factors unless explicitly stated.
Frequently asked questions
How accurate is the age calculator?+
The calculation follows the displayed formula and retains full numeric precision before formatting the result.
Can I use the result professionally?+
Use it as a planning estimate. Confirm regulated, medical, financial, or construction decisions with a qualified professional.