Calcolatore peso fetale

Unit

Gestational weeks (optional) weeks

Diametro biparietale (BPD) Centimetri (cm)

Circonferenza cranica (HC) Centimetri (cm)

Circonferenza addominale (AC) Centimetri (cm)

Lunghezza del femore (FL) Centimetri (cm)

Stima media: -

Error range: -

GA reference (P10-P90): -

Assessment: -

Età gestazionale di riferimento: -

Hadlock (AC+FL): -

Hadlock (BPD+AC+FL): -

Hadlock (HC+AC+FL): -

Hadlock (BPD+HC+AC+FL): -

Formula di Shepard: -

Advice: -

Fetal Weight Calculator

Estimate fetal weight (EFW) from ultrasound biometry using Hadlock and Shepard formulas. Supports cm/mm, optional gestational age with approximate P10–P90 reference, and a simple small/normal/large tip. For reference only—not a diagnosis.

Inputs

AC is most important for weight; AC+FL or BPD+AC is enough to compute.
Adding BPD/HC enables more Hadlock variants.

Notes

Typical ultrasound EFW error is about ±10–15%.
Growth trend across visits matters more than one estimate.
All calculations run locally in your browser.

Disclaimer: Consult your obstetrician for clinical decisions.