Quick answer: This blog explains baby age in plain language: how to convert weeks to months, how corrected age works for premature babies and what many babies are doing at each stage.
Latest guides
Baby Age in Months Chart: Weeks to Months Conversion
Find your baby’s age in months from weeks, with typical milestones.
Corrected Age for Premature Babies: How to Calculate It
What corrected age is, how to work it out and how long it is used.
How Many Weeks Are in a Month? Baby Age Explained
Why months and weeks never line up neatly, with a conversion table.
Need your baby’s exact age?
Use the free baby age calculator to get age in months, weeks, days and seconds, with corrected age for preemies.
Frequently asked questions
What does the Baby Age Calculator blog cover?
It covers baby age in months and weeks, corrected age for premature babies and typical milestones, with a short answer first in every guide.
How often is the blog updated?
We review our guides regularly and add new ones as parents ask new questions. Each guide shows its last updated date.
Is the blog medical advice?
No. Our guides are general information. Always follow your pediatrician’s advice about your baby’s health.
Written by the Baby Age Calculator editorial team. Last updated October 28, 2026. General information only, not medical advice. See our medical disclaimer.