Baby Age Calculator

Calculate a baby's exact age in weeks, months, and days from birth, with adjusted age for premature babies (corrected age) when applicable.

Frequently Asked Questions

What is corrected age?

The age a premature baby would be if born on the due date. Used by pediatricians for tracking developmental milestones until the baby is about 2 years chronologically.

How long do you use weeks for baby's age?

Most parents switch from weeks to months around 3-4 months. Healthcare providers often track in weeks until 12 months.

Is corrected age accurate for school age?

By age 2, corrected and chronological ages are usually used interchangeably. Older 'preemies' typically catch up to peers in development.

Pregnancy & Baby Disclaimer: Educational only. Not medical advice.

This calculator is for general informational and educational purposes only and is not medical advice. It does not diagnose, treat, prevent, or replace care from your OB-GYN, midwife, pediatrician, or other qualified healthcare provider. Pregnancy progress, baby growth, formula amounts, vitamin doses, sleep, and recovery vary widely by individual circumstance. Always consult your healthcare provider for any decisions about your pregnancy, your baby, or your postpartum recovery, and seek immediate medical attention for any concerns or emergencies.