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Medical CalculatorPregnancy & Fertility

Birth Weight Estimate Calculator

Estimate your baby's birth weight using fundal height and gestational age measurements. Get an approximation of fetal weight.

Updated 2025-01-153 min readCalzyra Medical Team

Calculator

Enter your values below

Health CalculatorEvidence-Based

cm
weeks

Formula & Methodology

How this calculator works

Estimated Birth Weight = Fundal Height × 8/7 (Johnson formula)

Uses the Johnson formula to estimate fetal weight from fundal height measurement in centimeters.

Frequently Asked Questions

Common questions about this calculator

Medical Disclaimer

Pregnancy calculators provide estimates based on standard formulas. Every pregnancy is unique. Always consult your OB-GYN or midwife for personalized care.

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Quick Links

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References

WHO GuidelinesCDC ResourcesAHA Recommendations