Background Introduction B-ultrasound is an essential part of pregnancy examination, which can check the growth and development of pregnant women and fetuses. Monitoring fetal weight is particularly important during late pregnancy. The traditional fetal weight estimation method requires measuring multiple parameters, which is time-consuming and labor-intensive. However, fetal weight can be calculated by measuring abdominal circumference alone through B-ultrasound. With this convenience, we can use online calculators to quickly calculate fetal weight. Calculator features Use the fetal weight calculator based on B-ultrasound to detect abdominal circumference alone to calculate the fetal weight easily and quickly. not only improve the work