Use this baby age calculator to find a baby's exact age in months, weeks, and days. It can also estimate corrected age for babies born early, show the next monthly age date, and point to broad milestone windows for planning checkups or family records.
Enter a baby birth date to see age in months, weeks, days, corrected age, and milestone windows.
Privacy note: calculator inputs stay in your browser and are not sent to an Age Finder server.
A baby age calculator finds a baby's calendar age from the date of birth to a selected date. Parents often need baby age in months, weeks, and days because pediatric visits, feeding notes, growth records, and milestone discussions use smaller age units than adult age pages. This tool also supports corrected age by letting you enter how many weeks early the baby was born. Corrected age can be useful for premature babies when comparing broad developmental windows. The result includes exact age, completed months, age in weeks, milestone focus, next monthly age date, and a checkup-style window without replacing medical guidance.
If a baby was born on January 1, 2026 and you calculate on July 5, 2026, the page gives a baby-focused result instead of a generic adult age result.
Milestone windows are broad planning notes. A pediatrician should answer health, growth, feeding, or development concerns.
FamilyCorrected Age Calculator Guide for Premature BabiesHow corrected age is used for premature babies, with important medical caveats.
FamilyPregnancy Due Date Guide, LMP, Conception Date, and Weeks PregnantHow due date estimates are calculated and why medical confirmation matters.
BirthdayBirthday Countdown Guide, How Many Days Until My Birthday?How birthday countdowns help with reminders, greetings, and planning.
Enter the baby's date of birth and the date you want to calculate on. The result shows completed months plus remaining days, so it reads naturally for baby records and checkups.
The calculator converts the total days since birth into full weeks plus leftover days. This is helpful for newborn and infant updates where weeks are more useful than years.
Corrected age adjusts for how early a baby was born. If a baby was born 8 weeks early, corrected age is usually about 8 weeks less than chronological age.
Yes. Enter the date of birth, calculation date, and how many weeks early the baby was born. The result shows both calendar age and corrected age.
Chronological age counts from the birth date. Corrected age estimates age from the expected due-date timing and is often used for premature babies during early development discussions.
Use the date of birth field and choose today's date or another date. The result shows the baby's exact age in months, weeks, days, and total days.
It shows broad milestone windows such as 2 months, 4 months, 6 months, 9 months, and 12 months. These are planning references, not a developmental diagnosis.
Yes. The result includes the next monthly age date, such as when the baby turns 7 months old, plus how many days are left.
Yes. After calculating, you can save the result as PDF, Word, or TXT, or share the result text when your browser supports sharing.
No. Use it for date planning and general information only. Ask a pediatrician about health, growth, feeding, vaccines, corrected age, or development concerns.