date tools
Age Calculator
Calculate exact age in years, months and days, total days lived and the next birthday.
Private by design
Enter your values
Results update locally in this browser.
How this tool works
Calendar-aware arithmetic compares the birth date with a selected date without uploading either value.
Privacy and limitations
Your entries and results stay in this browser. Check important results against the rules, records or systems that govern your situation.
Clear answers
Frequently asked questions
What does the Age calculator do?
Calculate exact age in years, months and days, total days lived and the next birthday.
How does the Age calculator work?
Calendar-aware arithmetic compares the birth date with a selected date without uploading either value.
What can I learn from the Age calculator?
It shows how the entered values or choices produce the result. Change one input at a time to compare outcomes and understand the underlying rule.
Does MW SysArc receive or store what I enter?
No. The calculation runs locally in your browser. MW SysArc does not receive or store your calculation inputs.
How should I use the result?
Use the result as a practical reference and review the explanation on this page when exact counting conventions matter.
Last reviewed 2026-07-14. Calculations tested 2026-07-14.