How to use
- Open Estimated Fetal Weight Calculator and enter the fields shown in the form.
Estimated Fetal Weight Calculator
Estimate your baby's fetal weight and percentile using standard obstetric formulas.
Result
Estimated fetal weight (g): 2624
Safety note
Use this result for planning and conversation. If symptoms, unusual growth changes, feeding problems, pregnancy concerns, or urgent health questions arise, contact a qualified healthcare professional.
Parent guide
How to use this tool
Estimate your baby's fetal weight and percentile using standard obstetric formulas.
What the result means
Estimate your baby's fetal weight and percentile using standard obstetric formulas.
Method
Hadlock-style ultrasound biometric estimate using BPD, AC and FL inputs
Worked example
Important limitation
Ultrasound weight estimates have material error and must be interpreted by qualified maternity care professionals.
Primary sources
References and data notes
Safety note
Use this result for planning and conversation. If symptoms, unusual growth changes, feeding problems, pregnancy concerns, or urgent health questions arise, contact a qualified healthcare professional.
Frequently asked questions
Which sources and method does this tool use?
The method, version and primary sources are listed in the evidence section above.
When should I use Estimated Fetal Weight Calculator?
Use it when you want a quick educational estimate for: Estimate your baby's fetal weight and percentile using standard obstetric formulas.
What affects the Estimated Fetal Weight Calculator result?
The result depends on the age, dates, measurements, units, reference choice, and assumptions shown in the form.