Size Volume & Percentile Calculator
Calculate volume, percentile ranking, and statistical comparison using your length and circumference measurements. Based on peer-reviewed scientific research data.
Volume Distribution
Distribution of calculated volumes from all users
Percentile Distribution
Distribution of percentile results from all calculations
Calculation Statistics
See how many volume calculations have been made over time
Volume Calculator Guides & Articles
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How This Calculator Works
- Volume Formula: Treats the shape as a cylinder — Volume = Length × (Circumference² / (4π))
- Percentile Calculation: Uses z-scores against published statistical averages from peer-reviewed studies
- Length Stats: Average erect length is 5.16" (SD 0.65") based on meta-analysis data
- Girth Stats: Average erect circumference is 4.59" (SD 0.50") based on meta-analysis data
- Volume Comparison: Average volume is approximately 8.6 in³ (SD ~2.5 in³)
- Privacy: All calculations are done locally in your browser — no data is stored or sent
Frequently Asked Questions
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