Frequently Asked Questions

Enter your birth year, month and day in the Age Calculator and select Calculate Age. You will see your age in years, months, days, weeks and total days.

Yes. The calculator accounts for leap years, varying month lengths, and Feb 29 birthdays. If you were born on Feb 29, your age updates on Mar 1 in non-leap years.

Yes. All age and date calculators are free. No account, sign-up or payment is required.

No. All calculations run locally in your browser. Your birth date and results are never uploaded, stored or shared with anyone.

The calculations use a calendar-accurate algorithm that counts each day individually, accounting for leap years and correct month lengths.

Yes. Use the Age on a Specific Date calculator. Enter your birth date and any past or future date to see your exact age on that day.

Ten calculators are available: Age Calculator, Date Difference, Birthday Countdown, Age on a Specific Date, Days Since Birth, Months Since Birth, Weeks Since Birth, Next Birthday, Retirement Age and Pet Age.

If you were born on Feb 29, the calculators treat your birthday as Mar 1 in non-leap years. This is the standard convention for legal age calculation in most countries.

The calculators provide accurate arithmetic but are not certified for legal, medical or official use. Verify critical age calculations with official records.

Yes. The interactive calculators require JavaScript to compute results. The informational pages work without JavaScript.

Use the Date Difference Calculator. Enter one person's birth date as the start date and the other's as the end date to see the exact age gap.

Pet age calculations use widely accepted veterinary formulas. Different breeds within a species may age at slightly different rates.