New Ballard Score (Gestational Age) — free guideline decision tool
Estimate neonatal gestational age with the New Ballard Score.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Common questions
What does New Ballard Score (Gestational Age) do?
Assign gestational age when dating is unknown or discordant with the exam.
How is the result calculated?
GA (weeks) = 24 + 0.4 × total of neuromuscular (6 items) and physical (6 items) maturity subtotals; total −10 to 50 maps to ~ 20–44 weeks.
Is this a substitute for clinical judgement?
No. All results are decision-support only, for licensed clinicians. They must be individualized to the whole patient and the latest guideline version.
Run New Ballard Score (Gestational Age) now
Estimate neonatal gestational age with the New Ballard Score.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.