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Fetal Weight Calculator

Health & Body

BPD/HC/AC/FL → Hadlock weight estimate

Quick Answer

Fetal Weight Calculator: BPD/HC/AC/FL → Hadlock weight estimate. Fetal Weight Calculator uses standard health formulas to compute accurate results instantly.

cm
cm
cm
cm
2,888 g
≈ 3 kg
Normal range (2500–4000 g)
Estimated range (±10%)2,599 – 3,176 g

Steps

  1. 1log₁₀(BW) = 1.3596 − 0.00386×AC×FL + 0.0064×HC + 0.00061×BPD×AC + 0.0424×AC + 0.174×FL
  2. 2= 10^3.4605 ≈ 2,888 g
  3. 3Assessment: Normal range (2500–4000 g)
  • Hadlock 1985 four-parameter formula (BPD/HC/AC/FL, cm). Ultrasound weight estimation carries a ±10–15% error — trends matter more than a single value.
  • BPD quick estimate (900×BPD−5200) applies from ~week 20 onward; BPD is measured at the thalamic plane.
  • BW > 4000 g suggests macrosomia; < 10th percentile suggests growth restriction. Always combine with amniotic fluid, fetal heart and clinical exam — follow your doctor's advice.

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How to Use

  1. Enter body metrics: fill height, weight, age etc. as prompted by the Fetal Weight Calculator.
  2. Read value and grade: results appear instantly with an authority-based classification.
  3. Check reference tables: confirm your range and healthy targets against the tables on this page.
  4. Back-solve your goal: adjust inputs to see what it takes to reach a target.

Key Points

  • Fetal Weight Calculator is a free online health tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: BPD/HC/AC/FL → Hadlock weight estimate.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Fetal Weight Calculator formula

Fetal Weight Calculator uses standard health formulas to compute accurate results instantly.

FAQ

How do I use the Fetal Weight Calculator?
Open the page and fill in the input fields — results update automatically. BPD/HC/AC/FL → Hadlock weight estimate.
Are the results accurate?
Results follow published international standards (WHO, ACE, IOM) and are for reference only.
Can this replace medical advice?
No. Always consult a qualified healthcare professional for health decisions.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on all devices.

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Source & Updates

Based on WHO, ACE, IOM and other published international standards. Last updated: 2025-07

Authoritative sources:

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Fetal Weight Calculator[EB/OL]. https://www.yijiansuan.com/en/c/health/fetal-weight

Results provided by this tool are for reference only and do not constitute professional advice.