Age Calculator in Days, Months and Years
Calculate your exact age in years, months, weeks, days, hours, minutes and seconds with our free age calculator. Enter your date of birth and an optional reference date to see your precise age instantly — perfect for birthdays, milestone planning, school admissions, or just curiosity.
Calculate your exact age in years, months, and days.
An age calculator in days, months and years gives you a precise breakdown of how long you (or anyone) have been alive. Useful for legal documents that require an exact age in days, for medical assessments, retirement planning, school cutoff dates, sporting eligibility, and visa applications. Our tool runs entirely in your browser — no signup, no tracking and no data sent to a server. Just enter the birth date and (optionally) a target date to get an instant, accurate result.
What does this age calculator show?
This age calculator shows your exact age in years, months, weeks, days, hours, minutes and seconds. It calculates the precise difference between your birth date and today (or any custom date).
When do you need an age calculator in days, months and years?
- School admissions — some schools require age in months
- Visa applications — immigration forms may need age in days
- Medical records — dosage charts for children
- Legal documents — inheritance and contracts
- Sports eligibility — youth tournaments use exact ages
- Retirement planning — count down to pension day
How is age calculated in days, months and years?
The calculator subtracts your birth date from the target date and breaks the result into years, then remaining months, then remaining days. It accounts for leap years and the varying lengths of each month so the answer is mathematically accurate.
Related calculators
Try our chronological age calculator, age gap calculator or menopause calculator.