Calculate baby age in months, weeks, days and total days from the birth date.
How to use this calculator
- Enter the baby’s birth date.
- Choose today or another date.
- Press calculate to see baby age in months, weeks, days and total days.
Results are based on calendar date calculations and are intended for everyday planning, reminders and personal milestones.
For memories, photos and family planning
Many families track early milestones in weeks and months. This calculator helps translate a birth date into an easy-to-read age for photo captions, memory books, family updates and event planning.
Date calculation only
This is not a health or development tool. It only calculates the time between two dates and does not evaluate growth, milestones or medical development.
Frequently asked questions
Is this a baby development calculator?
No. It only calculates age from dates and does not provide health or development advice.
Can I calculate baby age on a future date?
Yes. Choose a future “Calculate age on” date to plan a milestone photo or celebration.
Does the site store my baby’s birth date?
No. The calculator runs in your browser and the plugin does not store entered dates.