Penile Size Percentile Calculator

Fact Checked by: Dr. David Chen, MD, Urologist • Updated October 2023

Understanding where you fall on the statistical distribution can alleviate anxiety and provide medical clarity. This penile size percentile calculator uses data from the most comprehensive meta-analyses to compare your measurements against global averages.

Penile Size Percentile Calculator

Length Percentile: –

Girth Percentile: –

This means your size is greater than –% of the population.

Penile Size Percentile Calculator Formula

Percentile is calculated using the Z-Score formula for normal distribution:

Z = (x - μ) / σ

Where:

• x: Your measurement.
• μ (Mean): Population average (e.g., 13.12cm for erect length).
• σ (Std Dev): Standard deviation (e.g., 1.66cm for erect length).

Formula Source: BJU International (Veale et al. 2015)

Variables:

• State: Whether the measurement is taken while erect or flaccid.
• Length: Measured from the pubic bone to the tip (glans).
• Girth: The circumference measured at the thickest part of the shaft.

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What is a Penile Size Percentile Calculator?

A penile size percentile calculator is a statistical tool used to determine how an individual’s physical measurements compare to the rest of the male population. Unlike simple averages, percentiles provide a broader context, showing what percentage of men have a smaller or larger size.

Most modern calculators are based on the “Veale Study,” a systematic review of over 15,000 men worldwide. This data helps establish “normal” ranges and reduces medical anxiety (Small Penis Syndrome) by showing that most individuals fall within a standard bell curve.

How to Calculate Penile Size Percentile (Example)

1. Measure your erect length (e.g., 15 cm).
2. Identify the mean (13.12 cm) and standard deviation (1.66 cm).
3. Calculate Z-score: (15 – 13.12) / 1.66 = 1.13.
4. Convert Z-score to percentile using a probability table. A Z-score of 1.13 corresponds to the 87th percentile.

Frequently Asked Questions (FAQ)

Is there a “perfect” percentile? Statistics show that “normal” spans a wide range; health and function are far more important than a specific rank.

Does height affect percentile? While some studies show a weak correlation between height and penile length, it is not consistent across all populations.

How accurate is this calculator? It uses validated data from BJU International, though individual measurement techniques can vary results.

What is the average percentile? By definition, the 50th percentile represents the median or average of the population.