📊 Medical Statistics
- Average combined volume: 33-40 ml (both testicles)
- Average per testicle: 15-20 ml
- Normal range: 12-30 ml per testicle
- Average dimensions: 4-5 cm long × 2.5-3 cm wide
Fun Fact: Testicle size correlates more with sperm production than penis size. Larger testicles generally produce more sperm, but anything in the normal range functions perfectly fine.
🎯 What's Normal?
Testicle size varies significantly among men, and that's completely normal. Factors affecting size include:
- Genetics (biggest factor)
- Age (peak size at 30-40)
- Temperature (they shrink in cold)
- Time of day (slightly larger in morning)
- Arousal state (up to 50% increase when aroused)
⚖️ Asymmetry is Normal
About 65% of men have asymmetric testicles. Usually:
- The right testicle is slightly larger (in 65% of men)
- The left testicle hangs lower (in 85% of men)
- Size difference up to 20% is completely normal
⚠️ When to See a Doctor: Sudden changes in size, pain, lumps, or one testicle becoming significantly larger/smaller than the other. This calculator is for curiosity only - not medical diagnosis.
🔬 About Our Data
Our percentiles are based on multiple urological studies including:
- WHO multicenter study on testicular volume (n=9,000)
- European Association of Urology data (n=3,500)
- Asian Andrological studies (n=2,500)
- Combined dataset of 15,000+ measurements
💡 Measurement Tips
Water displacement is the most accurate method:
- Use warm (not hot) water - cold causes shrinkage
- Use a clear measuring cup for easy reading
- Measure one at a time for accuracy
- Do it when relaxed, not aroused
- Room temperature matters - warmer = more accurate