Fetal growth percentile calculator guide
The calculator compares an entered value with the selected reference. Review the input method, source choice, and display policy before using the result as general information.
Use the calculatorHow to use the calculator
Enter the pregnancy week, days, and the estimated fetal weight from the ultrasound report. Before 22 weeks, the form switches from estimated fetal weight to fetal biometry measurements.
What a percentile means
A percentile describes where the entered value sits within the selected reference. It is not a normal or abnormal judgment, and it should not replace clinical review.
What EFW means
EFW means estimated fetal weight. It is calculated from ultrasound measurements and can vary by formula, equipment, fetal position, and timing.
Display policy
The calculator can calculate a raw percentile, but the displayed label shows values below the 10th and above the 90th percentile as ranges.