Head Circumference Percentile Calculator vs Fetal Growth Percentile Calculator
Two calculators for the same neighbourhood of questions. Here is what each measures, what you feed in, and where you'd reach for one over the other.
Head Circumference Percentile Calculator
Plots a child's head circumference against age-based growth norms to return a percentile. Used by pediatricians to screen for microcephaly, macrocephaly, and hydrocephalus.
- Answers
- Percentile (%)
- Inputs
- Head Circumference, Age
Fetal Growth Percentile Calculator
Estimates fetal weight from ultrasound biometry (BPD, HC, AC, FL) and plots it against gestational-age percentiles. Used by clinicians and expectant parents to detect growth restriction or macrosomia.
- Answers
- Estimated Fetal Weight (grams)
- Inputs
- Biparietal Diameter (BPD), Head Circumference (HC), Abdominal Circumference (AC), Femur Length (FL)
At a glance
| Head Circumference Percentile Calculator | Fetal Growth Percentile Calculator | |
|---|---|---|
| Category | Pediatrics | Pregnancy |
| Answers | Percentile | Estimated Fetal Weight |
| Inputs | 2 | 4 |
| Result unit | % | grams |
When to use each
Plots a child's head circumference against age-based growth norms to return a percentile. Used by pediatricians to screen for microcephaly, macrocephaly, and hydrocephalus.
Estimates fetal weight from ultrasound biometry (BPD, HC, AC, FL) and plots it against gestational-age percentiles. Used by clinicians and expectant parents to detect growth restriction or macrosomia.