Estimates fetal weight from BPD, HC, AC, and FL using the Hadlock 4 ultrasound formula.
Enter BPD, HC, AC, and FL from the same ultrasound examination. The primary result is estimated fetal weight in grams, with kg, oz, and lb shown as additional outputs.
Enter biometric measurements from the same scan. The formula uses centimeters internally.
Distance across the fetal head, entered in cm or mm.
Fetal head circumference, entered in cm or mm.
Fetal abdominal circumference, entered in cm or mm.
Fetal femur length, entered in cm or mm.
This resource is intended for educational purposes only and is intended for US healthcare professionals. Healthcare professionals should use independent medical judgment. All decisions regarding patient care must be handled by a healthcare professional and be made based on the unique needs of each patient.