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Fetal Weight Calculator

Estimate fetal weight from ultrasound measurements. Reference only, not medical advice.

Estimated fetal weight
0 g
Pounds
0.00 lb
Formula
Hadlock-style HC/AC/FL estimate

Reference only. Ultrasound estimates can vary and must be interpreted by a qualified clinician.

FAQ

Questions people ask

Is this fetal weight estimate medical advice?

No. It is only a reference calculation and should be reviewed with an obstetric clinician.

Why can fetal weight estimates differ?

Ultrasound measurement variation, fetal position, gestational age, and formula choice can all affect estimates.

Which measurements are needed?

This version uses HC, AC, and FL in millimeters from an ultrasound report.

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