Fetal Growth Percentile Calculator
Calculate fetal growth percentiles and estimated weight based on ultrasound measurements
About this calculator
The Fetal Growth Percentile Calculator evaluates your baby's growth during pregnancy by comparing ultrasound measurements to standardized growth charts. This tool helps determine if your baby is growing at an appropriate rate by calculating percentiles for estimated fetal weight and key measurements like biparietal diameter, head circumference, abdominal circumference, and femur length. Healthcare providers use these percentiles to identify potential growth concerns and ensure optimal prenatal care throughout your pregnancy journey.
How to use
Enter your current gestational age in weeks and days, then input the ultrasound measurements provided by your healthcare provider, including biparietal diameter, head circumference, abdominal circumference, and femur length. The calculator will compute your baby's estimated weight and corresponding growth percentiles, showing how your baby's size compares to other fetuses at the same gestational age.
Frequently asked questions
What is a normal fetal growth percentile?
Percentiles between the 10th and 90th are considered normal. The 50th percentile represents average size for gestational age.
How accurate are fetal weight estimates?
Ultrasound weight estimates are typically accurate within 10-15% of actual birth weight, with accuracy improving closer to delivery.
When should I be concerned about growth percentiles?
Consult your doctor if measurements fall below the 10th percentile or above the 90th percentile consistently across visits.