Fetal Weight Calculator
Calculate estimated fetal weight during pregnancy using ultrasound measurements. Understand how BPD, HC, AC, and FL measurements affect weight estimation and growth percentiles.
Step 1: Ultrasound Measurements
Understanding Ultrasound Measurements
BPD (Biparietal Diameter) measures the width of baby’s head. HC (Head Circumference) measures around the head. AC (Abdominal Circumference) measures around the abdomen. FL (Femur Length) measures the thigh bone length.
Step 2: Calculation Parameters
About Fetal Weight Estimation
Fetal weight estimation uses ultrasound measurements and mathematical formulas. Accuracy varies but is typically within 10-15% of actual birth weight. Measurements should be taken by a trained professional.
Fetal Weight Results
Estimated Fetal Weight
Fetal Growth Percentiles
| Gestational Age | 10th %ile | 50th %ile | 90th %ile | Your Baby |
|---|
Fetal Development Timeline
Fetal Weight Formula
Hadlock Formula: Log10(EFW) = 1.3596 – 0.00386 × AC × FL + 0.0064 × HC + 0.00061 × BPD × AC + 0.0424 × AC + 0.174 × FL
Estimated Fetal Weight (EFW) is calculated using multiple ultrasound measurements. The Hadlock formula is considered one of the most accurate, with reported accuracy of 8-15% compared to actual birth weight.
Need Professional Medical Advice?
Always consult with your healthcare provider for accurate fetal assessment. This calculator is for informational purposes only and should not replace professional medical advice.
Consult Healthcare Provider