Methodology
Age Calculator Methodology
Calendar-difference based age and duration calculation.
By Yadav PatleLast updated:
Formula
Age = floor( (today − birthdate) / 365.2425 ) (with month/day adjustment)
Variables
| Symbol | Name | Description |
|---|---|---|
| today | Current date | User's local current date. |
| birthdate | Date of birth | User-entered. |
Worked example
Born 1995-03-15, today 2026-06-06 → 31 years, 2 months, 22 days.
Assumptions and limitations
Every model leaves something out. Here is what this calculator assumes, and what it does not model, so you can interpret the output honestly:
- Local timezone is used. Cross-timezone events may differ by a day.
- Leap years are accounted for using calendar arithmetic, not a 365-day approximation.
Try it now
Plug in your own numbers in the Age Calculator and see the formula applied in real time.
This methodology page is for educational purposes only. Calculations are estimates; real-world results vary with taxes, fees, expense ratios, and market conditions. Yadav Patle is not a SEBI-registered investment adviser. For personalised advice, consult a registered adviser.