Fetal Growth Calculator
Estimate baby's size and weight based on pregnancy week and ultrasound measurements
About this calculator
The Fetal Growth Calculator helps expectant parents and healthcare providers estimate a baby's size and weight during pregnancy based on ultrasound measurements and gestational age. This tool uses standard fetal growth charts and biometric data to provide approximate measurements for head circumference, abdominal circumference, femur length, and estimated fetal weight. It's particularly useful for tracking healthy development, identifying potential growth concerns, and preparing for delivery by giving parents a better understanding of their baby's current size relative to typical growth patterns.
How to use
Enter your current pregnancy week and input available ultrasound measurements such as biparietal diameter, head circumference, abdominal circumference, and femur length. The calculator will process these measurements against standardized growth charts to estimate your baby's current weight and size. Results show percentiles comparing your baby's measurements to typical ranges for the same gestational age.
Frequently asked questions
How accurate are fetal growth calculator estimates?
Estimates are generally accurate within 10-20% of actual birth weight, though accuracy improves closer to delivery date.
What ultrasound measurements are needed for calculation?
Key measurements include biparietal diameter, head circumference, abdominal circumference, and femur length from routine ultrasound scans.
When should I be concerned about fetal growth results?
Consult your healthcare provider if measurements fall below 10th percentile or above 90th percentile for gestational age.