Semen Analysis Calculator
Understanding Your Semen Analysis
Each parameter tells a different story about male fertility. Here's what each one means.
Volume & pH
Normal volume is ≥ 1.4 mL. Low volume may indicate retrograde ejaculation or blocked ejaculatory ducts. pH (7.2–8.0) reflects secretion from seminal vesicles and prostate.
Count & Concentration
Concentration ≥ 16 million/mL and total count ≥ 39 million per ejaculate are normal. Oligozoospermia (low count) has many treatable causes including hormonal imbalance and varicocele.
Motility
At least 42% of sperm should be moving (total motility) and 30% should move progressively forward. Poor motility (asthenozoospermia) reduces the chance of natural fertilisation.
Morphology
At least 4% normal forms (Kruger strict criteria) are required. Morphology reflects sperm DNA packaging quality. Teratozoospermia can affect fertilisation even with ICSI.
DNA & WBC
WBCs > 1 million/mL (leukocytospermia) may indicate infection or inflammation. Sperm DNA fragmentation (not in this calculator) is a separate test for cases with normal parameters but poor outcomes.
Treatment Path
Results guide treatment: Mild issues may improve with lifestyle and supplements. Moderate issues often respond to medication. Severe cases may need ICSI, surgical retrieval, or donor sperm.
WHO 2021 Reference Values at a Glance
The 5th centile values from the WHO 2021 manual — the lowest normal values from fertile men.
| Parameter | Lower Reference Limit | Clinical Condition if Below | Impact |
|---|---|---|---|
| Volume | ≥ 1.4 mL | Hypospermia | Fewer sperm delivered to cervix |
| pH | 7.2 – 8.0 | Abnormal secretions | Reflects seminal vesicle / prostate function |
| Sperm Concentration | ≥ 16 M/mL | Oligozoospermia | Reduced chance of natural conception |
| Total Sperm Count | ≥ 39 M/ejaculate | Oligozoospermia | Low absolute number of sperm |
| Total Motility (PR + NP) | ≥ 42% | Asthenozoospermia | Fewer sperm capable of reaching egg |
| Progressive Motility | ≥ 30% | Asthenozoospermia | Reduced forward movement efficiency |
| Morphology (Kruger) | ≥ 4% normal | Teratozoospermia | Affects fertilisation ability |
| WBC / Leucocytes | < 1 M/mL | Leukocytospermia | Suggests infection or inflammation |
| TMSC | ≥ 9 M (IUI) | Poor IUI candidate if lower | Key metric for IUI suitability |
Source: WHO Laboratory Manual for the Examination and Processing of Human Semen, 6th Edition (2021)
Enter Your Semen Analysis Values
Enter the values from your report. You may leave any field blank if not available.
WHO ref: ≥ 1.4 mL
WHO ref: ≥ 16 M/mL
WHO ref: < 1 M/mL
WHO ref: ≥ 42%
WHO ref: ≥ 30%
WHO ref: ≥ 4%
What this calculator analyses
WHO 2021 Standards
Compares each parameter against the latest WHO reference values for fertile men.
Derived Metrics
Automatically calculates Total Count and TMSC (Total Motile Sperm Count) from your values.
Clinical Conditions
Identifies standard andrological conditions (Oligozoospermia, Asthenozoospermia etc.) from your results.
Get expert support
Speak to our male fertility specialists about your results.
Our andrologists and fertility team can review your full semen analysis, investigate the cause, and recommend the most effective treatment pathway.
My semen report said 'abnormal' and I didn't even know what OAT syndrome meant. Entering my numbers into this tool told me exactly which parameters were affected — and the next steps helped me ask the right questions at my andrologist appointment. We did ICSI and now have twins.
Who Should Use This Calculator?
Just received your semen report
Make sense of your results before — or as preparation for — your specialist appointment.
Repeating after lifestyle changes
Track improvement across reports after making dietary or lifestyle changes over 3–6 months.
Couples investigating infertility
Male factor affects 50% of cases. This gives both partners a clearer picture from day one.
Before starting IVF/ICSI
Understand whether your TMSC supports IUI, standard IVF, or whether ICSI is the recommended path.
Monitoring a known condition
Men with varicocele, hormonal treatment, or prior infection can track parameter improvements.
Proactive male health check
No fertility concerns yet? Understanding your baseline before trying is always a positive step.
About This Tool
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