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Age Calculator
Calculate exact age in years, months, and days from any date of birth.
Overview
Enter your Date of Birth and optionally an "As on" date to calculate the exact age in years, months and days. The calculator accounts for leap years, varying month lengths, and provides totals (days, months, weeks). All calculations happen locally in your browser — no data leaves your device.
Why Use This Age Calculator?
- Check eligibility cut-off dates for exams, school admissions and government jobs.
- Verify age for KYC, passport or Aadhaar applications.
- Quickly get totals like total days lived, approximate months and weeks.
- Works offline — fast and private.
How It Works (Simple)
The calculator computes the calendar difference between two dates. It first calculates whole years, then remaining months, and finally remaining days, borrowing days from the previous month when needed. For total days it uses the exact millisecond difference divided by 86,400,000 (24×60×60×1000).
Age Calculator for Exams & Government Jobs
Many Indian exams and government application forms specify an "as on" cut-off date. Use the "Calculate age on a specific date" option to set that cut-off and verify whether you fall within the required age range.
Examples
Example: Born on 29/02/2004 — as on 01/03/2026 the calculator shows 22 years, 0 months, 1 day. Leap days are handled correctly.
Frequently Asked Questions
- How is age calculated from date of birth?
We perform a calendar-based difference (years, months, days). Months and days are computed taking into account each month's actual length and leap years.
- Can I calculate age on a future date?
Yes — enable the "Calculate age on a specific date" toggle and select the future date. This is useful for planning retirements or checking future eligibility.
- Is this age calculator accurate for government forms?
It returns the precise calendar age. However, some government forms apply custom rounding or exclusive/inclusive rules — always read the specific guidelines of the form you are filling.
- Does this calculator work offline?
Yes. All logic runs in your browser with no external API calls. You can use it even without internet access once the site is loaded.
- Is my data stored?
No. 100% Private — this site does not send or store your dates. All calculations happen in your browser only.
- What about people born on 29th February?
The calculator treats leap day births consistently: when an "as on" year is non-leap, the day difference uses the calendar borrowing rule resulting in correct year/month/day outputs.
- Can I copy or download the result?
Yes — use the "Copy Result" or "Download PDF" buttons to share your result. The PDF includes CalcNest branding and links to other calculators.
- Which calculators on CalcNest help with related planning?
Try these tools for financial and planning needs:
Need More Help?
If you'd like us to add features (age-difference calculator, CSV export of results, or multi-person comparison), tell us via the contact page.