5 Best Free Online Fetal Weight Calculator Websites

Here is a list of the best free online fetal weight calculator websites. Fetal weight calculation is a procedure to estimate fetal weight before delivery. This is possible with the help of ultrasound that measures several parameters of the fetus such as Head Circumference, Abdominal Circumference, Femur Length, etc. It is important to estimate fetal weight as it can help doctors to identify fetuses that are at risk for complications during delivery. In addition, fetal weight estimation can also help guide decisions around the induction of labor. Overall, fetal weight estimation can help medical professionals to assure the well-being of the mother and the baby.

This post covers 5 free websites where you can calculate the fetal weight based on various parameters. These calculators require you to provide several measurements of the fetus to accurately estimate the fetal weight. Some calculators can also determine other parameters when the fetal weight is known. On top of that, you also get a fetal growth graph that shows the fetal weight week by week.

My Favorite Online Fetal Weight Calculator

SRHR.org‘s fetal growth calculator is my favorite calculator on this list to estimate fetal weight. Apart from the fetal weight, this calculator can also calculate Gestational age, Head Circumference, Abdominal Circumference, Femur Length, Biparietal Diameter, and Humerus Length. Whatever parameter you calculate with this calculator, it also plots an age percentile graph with that parameter.

You can check out our other lists of the best free Pregnancy Calculator Online Websites, Nutrition Calculator App For Android, and Health Symptom Checker Services.

Comparison Table:

Name	Fetal Weight	HC/BPD/AC/FL	Percentile Graph
SRHR.org	✓	✓	✓
OmniCalculator.com	✓	-	✓
NICHD.NIH.gov	✓	Percentile	✓
Prokerala.com	✓	-	✓
HappyChildren.life	✓	-	✓

SRHR.org

SRHR.org offers a free online fetal growth rate calculator. The calculator is based on the World Health Organization Fetal Growth Charts. You can use this calculator to estimate Fetal Weight, Gestational age, Head Circumference, Abdominal Circumference, Femur Length, Biparietal Diameter, and Humerus Length. You just have to enter the required parameters to find the missing parameter. Along with the calculation, this calculator also generates an age percentile graph with the calculated parameter. The graphs reflect the overall fetal growth variation in selected healthy low-risk pregnancies under favorable nutritional and social conditions.

Highlights:

• It can calculate Gestational age, Head Circumference, Abdominal Circumference, Femur Length, Biparietal Diameter, Humerus Length, or Estimated Fetal Weight.
• It generates an age-to-weight percentile graph.
• Users can also generate an age percentile graph with any other parameter.

OmniCalculator.com

OmniCalculator.com is a popular website with a wide collection of online calculators. It has a free online fetal weight percentile calculator. This calculator estimates the fetal weight based on Gestational age, Head Circumference, Abdominal Circumference, Femur Length, Biparietal Diameter, and Femur Length. You have to enter all these parameters into the calculator then it gets you the estimated weight of the fetus. Along with that, it also plots a weight percentile graph and tells you whether the fetal weight is in the normal range or not.

Highlights:

• It can calculate Fetal Weight from Gestational age, Head Circumference, Abdominal Circumference, Femur Length, Biparietal Diameter, Femur Length, or Estimated Fetal Weight.
• It generates a fetal weight percentile graph.
• It also shows whether the fetal weight is in the normal range or not.

NICHD.NIH.gov

NICHD.NIH.gov offers a free online fetal growth calculator. You can use this calculator to determine fetal weight. To do that, you have to add the Gestational age, Race, Biparietal Diameter, Head Circumference, Abdominal Circumference, and Femur Length. With those parameters added, you can run the calculator to get the estimated fetal weight. Along with the fetal weight, this calculator shows the percentile for Biparietal Diameter, Head Circumference, Abdominal Circumference, and Femur Length. It also determines the EFW1-4 from the different combinations of HC, BPD, AC, and FL.

Highlights:

• It can calculate Fetal Weight from Gestational age, Race, Biparietal Diameter, Head Circumference, Abdominal Circumference, and Femur Length.
• It shows the percentile of each added parameter and also shows a warning for any abnormal input.
• It also calculates EFW1, EFW2, EFW3, and EFW4.

Prokerala.com

Prokerala.com has a free online fetal weight calculator. This calculator calculates the estimated fetal weight from Fetal Biparietal Diameter and Fetal Abdominal Circumference. Along with that, you can also provide Femur Length to get more accurate results. With these inputs, the calculator estimates the fetal weight using 5 different equations covering Hadlock Equation, Shinozuka Formula, Warsof Formula, Shepard Method, and Vintzileos Formula.

Highlights:

• It calculates Fetal Weight from Biparietal Diameter, Abdominal Circumference, and Femur Length.
• It estimates the fetal weight using 5 different equations.
• You can also use this calculator to calculate average fetal weight based on Gestational age.

HappyChildren.life

HappyChildren.life is another website where you can calculate fetal weight online. It offers a simple calculator that uses the Shepard Formula to calculate fetal weight. For the calculations, you have to provide the Head Circumference and Abdominal Circumference. When you do that, the calculator shows you the estimated weight of the fetus.

Highlights:

• This calculator estimates the Fetal Weight from Head Circumference and Abdominal Circumference.
• It uses the Shepard Formula to calculate fetal weight.

Frequently Asked Questions