The formula for calculating testicular volume = length x width x thickness x π/6. Measurement of the volume of the testicles, mainly in the ultrasound under the testicular size measurements, in which the measured data include the length, width and thickness of the testicles, and then use the testicular formula to initially calculate the volume of the testicles, in which the volume of the testicles = Length × Width × Thickness × π / 6, and is generally calculated in centimeters, and the volume size of the testicles of a normal adult is probably around 15 ~ 25cm. From the point of view of the volume size of testicles, the volume of testicles is too large or too small is an abnormal state, which needs to be analyzed in combination with other clinical manifestations, and if necessary, it is also necessary to consult the doctor in time and carry out a detailed examination. To summarize, if there is any abnormality in the size of testicles, you should consult a doctor in time.