Enter the AP and transverse diameters of a thyroid nodule to calculate its aspect ratio, assess malignancy risk, and help interpret your ultrasound report.
Enter nodule dimensions to calculate.

Fetal Weight Calculator
Estimate fetal weight using ultrasound measurements (BPD, AC, FL) with multiple standard obstetric formulas.

Creatinine Clearance Calculator
Enter your age, weight, and serum creatinine to quickly assess your kidney function.

Child Height Predictor Calculator
Predict a child's potential adult height range based on parents' heights and gender, providing parents with a reliable growth trend reference.
When you receive a thyroid ultrasound report and are unsure how to calculate or interpret the nodule's aspect ratio, this tool provides a quick calculation and preliminary assessment. The aspect ratio of a thyroid nodule is the ratio of its anteroposterior (AP) diameter (depth) to its transverse diameter (width). It is a crucial morphological indicator for assessing whether a nodule is benign or malignant. By entering the AP and transverse diameters (in centimeters), this tool calculates the exact aspect ratio and provides a status prompt based on medical standards (an aspect ratio > 1, often referred to as "taller-than-wide," indicates a higher risk of malignancy).
Input values must be positive numbers in centimeters. The calculation results are for preliminary reference only and cannot replace a professional medical diagnosis. For nodules with special morphologies (e.g., cystic-solid, multiple confluent nodules), please consult a specialist.
As an auxiliary tool, these calculation results should be evaluated alongside other ultrasound features (such as margins, calcifications, etc.) for a comprehensive assessment. Example: If a nodule has an AP diameter of 1.2 cm and a transverse diameter of 1.0 cm, the aspect ratio is 1.2, indicating a higher risk of malignancy. However, the final diagnosis must be made by a physician.