Adjusted Age Calculator

Calculate corrected age for preterm and post-term babies

Birth Information

/ /
weeks days

Current Date

/ /

Adjusted Age

--
Please enter birth information

This free Adjusted Age Calculator helps you calculate the corrected age for premature babies. Enter the birth information using either gestational age (GA) or expected due date (EDD), and get accurate adjusted age calculations following medical guidelines from AAP, CDC, and ACOG. This tool is essential for healthcare professionals and parents to properly assess premature infant development and milestone tracking.

How to Use

  1. Choose between Gestational Age (GA) or Expected Due Date (EDD) input mode
  2. Enter the Birth Date (month, day, year)
  3. Enter either GA at birth (weeks and days) or Expected Due Date
  4. Set the Current Date to calculate adjusted age as of that date
  5. View results in multiple formats (weeks/days, months/days, years/months/days)

Examples

  • GA Mode: Born at 32 weeks 3 days → Calculate adjusted age from due date
  • EDD Mode: Due date 2024-01-15, born 2023-11-20 → Calculate corrected age
  • Current Assessment: Use adjusted age until 24 months corrected age

Frequently Asked Questions

How accurate is this adjusted age calculator?

Our calculator uses medical-grade calculations based on AAP, CDC, and ACOG guidelines. It handles edge cases like leap years, DST transitions, and gestational age ranges (20-42 weeks) with comprehensive validation.

When should I stop using adjusted age?

According to medical guidelines, you should stop using adjusted age when the baby reaches 24 months corrected age. After that point, use chronological age for developmental assessments.

What's the difference between GA and EDD modes?

GA (Gestational Age) mode uses weeks and days at birth, while EDD (Estimated Due Date) mode uses the expected delivery date. Both methods produce the same accurate results for adjusted age calculation.

Is this calculator suitable for healthcare professionals?

Yes, this calculator is designed for both healthcare professionals and parents. It follows medical guidelines and provides accurate calculations suitable for clinical use and developmental assessments.

What gestational age range does it support?

The calculator supports gestational ages from 20 to 42 weeks, covering the full range of premature to post-term births with appropriate validation.

How does it handle leap years and DST?

The calculator uses precise date calculations that properly handle leap years, daylight saving time transitions, and other calendar complexities to ensure accurate results.

Is this calculator free to use?

Yes, this adjusted age calculator is completely free with no registration required. It's designed to be accessible to all healthcare providers and families.

What medical guidelines does it follow?

This calculator follows guidelines from the American Academy of Pediatrics (AAP), Centers for Disease Control and Prevention (CDC), and American Congress of Obstetricians and Gynecologists (ACOG).

How can I get help or report an issue?

If you encounter any problems or have questions, please contact us at [email protected]. We're here to help!