Baby Size Calculator
Estimate baby's size and weight based on current week of pregnancy and ultrasound measurements
About this calculator
The Baby Size Calculator provides expectant parents with an estimate of their baby's current size and weight based on their pregnancy week and ultrasound measurements. This tool uses standard fetal growth charts and biometric data to give you a clearer picture of your baby's development. Understanding your baby's estimated size helps you prepare for delivery, track healthy growth patterns, and provides reassurance during your pregnancy journey.
How to use
Enter your current week of pregnancy and input available ultrasound measurements such as biparietal diameter, head circumference, abdominal circumference, and femur length. The calculator will process these measurements against standard growth charts to estimate your baby's weight and size percentile.
Frequently asked questions
How accurate are baby size calculator estimates?
Estimates are generally accurate within 10-15% but can vary. Ultrasound measurements and individual growth patterns affect precision.
When are ultrasound measurements most reliable for size estimation?
Measurements are most accurate between 20-32 weeks of pregnancy when fetal structures are clearly visible and measurable.
What if my baby measures larger or smaller than average?
Size variations are normal. Consult your healthcare provider if measurements fall significantly outside typical ranges for guidance.