Sperm Analysis Calculator

TMSC is calculated by multiplying semen volume × sperm concentration × total motility percentage. It represents the actual number of moving sperm in your ejaculate and is considered the single most clinically relevant number for assessing fertility potential. A TMSC above 20 million is generally considered normal; values below 5 million may indicate the need for assisted reproduction.

The WHO 2010 (5th Edition) lower reference limits are: volume ≥ 1.5 mL, concentration ≥ 15 million/mL, total sperm count ≥ 39 million, total motility ≥ 40%, progressive motility ≥ 32%, vitality ≥ 58%, morphology (normal forms) ≥ 4%, and leukocytes < 1 million/mL. These are lower limits, not optimal targets — many fertile men exceed these values significantly.

According to WHO 2010 standards, total motility (all moving sperm) should be at least 40%, and progressive motility (sperm moving forward) should be at least 32%. Low motility is called asthenozoospermia and can reduce the chances of natural conception, though treatments are available.

Sperm vitality refers to the percentage of live sperm in the sample, regardless of whether they are moving. WHO 2010 sets the lower reference at ≥ 58% live sperm. Low vitality (necrozoospermia) means many sperm are dead and non-functional, which is different from — and often worse than — low motility.

Functional sperm count estimates the number of sperm that are both alive and structurally normal enough to potentially fertilize an egg. It is calculated as: Ejaculate Volume × Concentration × (Total Motility / 100) × (Vitality / 100) × (Morphology / 100). This gives you a refined estimate beyond total count alone.

Sperm production is a continuous process that takes approximately 72 days (spermatogenesis), so results can fluctuate based on recent illness, fever, stress, alcohol consumption, days of abstinence, and even the laboratory processing the sample. A single abnormal result does not necessarily indicate infertility — most clinicians recommend repeating the test after 2–3 months before drawing conclusions.

Sperm morphology refers to the shape and structure of sperm cells. WHO 2010 uses Kruger strict criteria, setting the lower limit at ≥ 4% normal forms. Having less than 4% normal forms is called teratozoospermia. Even with low morphology scores, natural conception is possible, but the chances are reduced. Morphology is always assessed alongside motility and count.

You should consult a urologist or reproductive endocrinologist if one or more parameters fall below WHO reference values, especially if you have been trying to conceive for 12 months (or 6 months if your partner is over 35) without success. A semen analysis is just one part of a full fertility evaluation — hormone levels, genetic testing, and physical examination are often needed to determine the underlying cause.