Testicular volume and asymmetry
Calculates testicular volume from ultrasound measurements and the difference between testes (varicocele follow-up).
Result
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Formula and thresholds
Volume (ml) = 0.71 × length × width × height (cm, Lambert). Asymmetry (%) = (larger − smaller volume) / larger volume × 100.
Clinical note
In adolescent varicocele, a persistent volume difference of more than 20% or more than 2 ml may indicate testicular growth arrest and is among the indications for treatment. The difference should be confirmed on repeat measurements under the same conditions, ideally by the same examiner; a single measurement is not enough for a surgical decision. The Lambert formula (0.71) is closer to true volume than the ellipsoid formula (0.52); always use the same formula when comparing.
This calculator is for medical professionals and does not replace clinical judgement. Do not enter the patient’s name: data is not sent anywhere and is processed only in your browser.
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