Thyroid Volume Calculator

Ellipsoid Method: Volume of one lobe = 0.523 × Width × Depth × Length
Brunn Method(WHO): Volume of one lobe = 0.479 × Width × Depth × Length
Ellipsoid(Heywood): Volume of one lobe = (π/6) × R × R × Length = (2/3) × S × Length
* 0.523 ≈ π/6, R(cm) = 2 × √(S/π), S(cm²) = Area of th Thyroid ROI
※ Generally, Ellipsoid Method is most commonly used in clinical practice.

*Width : Left-right width of thyroid lobe (Transverse plane)
*Depth : Anterior-posterior thickness[A-P] of thyroid lobe (Transverse or Longitudinal plane)
*Length : Longitudinal length of thyroid lobe (Longitudinal plane)

(1) Rt. Thyroid Lobe

Width (cm) :
Depth (cm) :
Length (cm) :
ROI [Optional] (cm²) :

(2) Lt. Thyroid Lobe

Width (cm) :
Depth (cm) :
Length (cm) :
ROI [Optional] (cm²) :
*If ROI and Length values are available, Ellipsoid(Heywood) Volume will also be calculated.

※ Normal adult thyroid volume: approximately 15 ~ 20mL