Ballard Score

Estimate gestational age using the New Ballard Score with neuromuscular and physical maturity criteria.

Disclaimer

This calculator is for clinical decision support only. Always verify with your institutional protocols.

Neuromuscular Maturity

Posture

Square Window (Wrist)

Arm Recoil

Popliteal Angle

Scarf Sign

Heel to Ear

Physical Maturity

Skin

Lanugo

Plantar Surface

Breast

Eye/Ear

Genitals (Male / Female)

Score to Gestational Age Conversion

Score -10:20 wks

Score -5:22 wks

Score 0:24 wks

Score 5:26 wks

Score 10:28 wks

Score 15:30 wks

Score 20:32 wks

Score 25:34 wks

Score 30:36 wks

Score 35:38 wks

Score 40:40 wks

Score 45:42 wks

Score 50:44 wks

References

1. Ballard JL, et al. New Ballard Score, expanded to include extremely premature infants. J Pediatrics. 1991.
2. Cloherty and Stark's Manual of Neonatal Care, 9th Edition.