Free parent tool

Baby Age Calculator

Enter the birthday, get the exact age in months and weeks, plus the milestones and gear that match this stage.

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Start with the birthday

Everything below updates instantly.

Baby's birthday

Born early? Add the due date for adjusted age

What you get

Exact age in months, weeks, and days from your baby's birthday
Current developmental stage with milestone descriptions
Age-appropriate product recommendations for their exact stage
Upcoming milestones to watch for in the next few weeks
Works for due dates too, showing adjusted age for preemies
Quick links to guides and content matched to your baby's age

Enter your baby's birthday and instantly see their age in months, weeks, and days. We'll also show you their current developmental stage, key milestones to look for, and product recommendations that match exactly where they are right now. Because knowing your baby is 27 weeks old is more useful than saying "almost 7 months" when you're shopping for the right toys.