Fetal Growth Calculator (Barcelona-Style Reference)
Enter gestational age and fetal biometry from ultrasound to estimate fetal weight and percentile.
Formula used: Hadlock (HC, AC, FL). Percentiles are interpolated from a Barcelona-style educational growth reference.
What is the “calculator fetal barcelona”?
A calculator fetal barcelona is typically used to estimate fetal growth status by combining ultrasound measurements with gestational age. In practice, clinicians compare estimated fetal weight (EFW) against reference curves to determine whether a baby is small, average, or large for gestational age.
This page gives you an easy-to-use version of that process: enter basic biometric data and get an instant EFW with percentile interpretation.
How this calculator works
1) EFW calculation from ultrasound values
The calculator uses the Hadlock equation with:
- HC (head circumference)
- AC (abdominal circumference)
- FL (femur length)
These are standard ultrasound inputs commonly used in obstetric assessments.
2) Percentile estimation by gestational age
After estimating fetal weight, the value is compared to a gestational-age growth reference (10th, 50th, and 90th centiles). Interpolation is used for exact week/day combinations.
How to interpret results
- <3rd percentile: very small for gestational age; requires clinical evaluation.
- 3rd to <10th percentile: small for gestational age (SGA) range.
- 10th to 90th percentile: appropriate growth range for gestational age.
- >90th percentile: larger-than-average growth pattern.
Percentile alone does not diagnose pathology. Doppler studies, maternal conditions, amniotic fluid, and growth trend over time are essential for medical decisions.
Best practices when using fetal growth calculators
Use accurate measurements
Small measurement differences can produce meaningful changes in EFW and percentile. Always rely on measurements acquired by trained professionals.
Track trends, not one-off values
A single scan is useful, but serial growth over 2–4 weeks often provides better insight than one isolated result.
Keep context in mind
Maternal height, parity, diabetes, hypertension, and placental factors all influence interpretation.
Frequently asked questions
Is this an official Barcelona hospital calculator?
No. This is an educational implementation inspired by common fetal-growth workflows and Barcelona-style percentile interpretation.
Can I use this to self-diagnose fetal growth restriction?
No. Growth restriction diagnosis requires structured clinical assessment, often including Doppler and repeated ultrasounds interpreted by specialists.
Which unit should I use?
Enter HC, AC, and FL in millimeters (mm), as displayed in most ultrasound reports.