Quick answer: Baby Age Calculator is a free website that tells parents their baby’s exact age in months, weeks and days, and explains what those numbers mean, including corrected age for premature babies.
Our mission
Everyone asks “how old is your baby?”, and the answer changes every week. We make it easy to get a precise answer and understand milestones and corrected age without confusion.
What you will find here
- The free baby age calculator with live results and corrected age.
- Plain-language guides on weeks, months and milestones.
- Clear policies: privacy and medical disclaimer.
How does the baby age calculator work?
It subtracts the birth date from today’s date, counts full calendar months and leftover days, then converts the total into weeks, hours and seconds. Everything runs in your browser, so your baby’s details are never sent to us.
Our editorial and corrections policy
We write for clarity, base medical information on widely used pediatric guidance, review guides regularly and correct errors quickly. Found a mistake? Tell us.
At a glance
| Topic | Details |
|---|---|
| What it is | A free baby age calculator and parenting guide |
| Who it is for | Parents, caregivers and grandparents |
| Cost | Free, no sign-up |
| Contact | hello@agecalculatorforbaby.com |
Frequently asked questions
What is the Baby Age Calculator website?
It is a free website that calculates a baby’s exact age in months, weeks and days and explains baby age, milestones and corrected age.
Is the Baby Age Calculator free to use?
Yes. The calculator and guides are free and need no sign-up.
Does this website give medical advice?
No. The information is general. Always ask your pediatrician about your baby’s health and development.
Written by the Baby Age Calculator editorial team. Last updated October 28, 2026. General information only, not medical advice. See our medical disclaimer.