Calcmedical

Corrected Age (Preterm)

Pediatrics

Medical context

Calculate corrected (adjusted) age for preterm infants used in growth and developmental assessment.

Pediatric teams must confirm age-appropriate references and weight-based dosing with local protocols.

This page explains the Corrected Age formula, how to interpret the output, known limitations, and peer-reviewed references so you can verify results against primary sources and local protocols.

It is grouped under Pediatrics because neonatal and pediatric medical calculators.

How to use this calculator

  1. Enter the values requested by the Corrected Age calculator using the units shown beside each field.
  2. Review the calculated result and read the interpretation section before acting on the output.
  3. Check limitations and references if the result will change management, dosing, or disposition.
  4. Use the related calculators section when you need supporting values (for example electrolytes, weight, or complementary risk scores).

Calculator

Result

0 weeks

Corrected age · born 12 w early

Corrected age = chronological age − (40 − gestational age at birth). Used for growth/development in preterm infants.

Educational use only. Confirm results with clinical judgment, primary sources, and local protocols. Not a substitute for professional medical advice. Full disclaimer.

Formula

Corrected age = chronological age − (40 weeks − gestational age at birth).

Interpretation

Use corrected age for milestones and growth charts typically until 2 years (follow local guidance).

Limitations

Extremely preterm infants may need individualized developmental framing.

Frequently asked questions

Until what age do I correct?
Commonly until 24 months chronological age, but practices vary.
Is the Corrected Age result enough to make a treatment decision?
No. Calculators support medical decision-making but do not replace examination, shared decision-making, institutional protocols, or consultant input when stakes are high.
Does Calcmedical store the values I type in?
Inputs are processed in your browser for this session. We do not ask for patient names or medical record numbers. See our privacy policy for hosting and analytics details.

References

  • AAP / standard corrected-age practice