Penile Size Percentile Calculator

Percentiles are calculated by comparing your measurements against the distribution data from the Veale et al. (2015) systematic review, which analyzed measurements from over 15,000 men. If you are at the 60th percentile, your measurement is larger than 60% of the men in the study population. Linear interpolation is used between known data points for precision.

This calculator uses data from the systematic review by Veale et al. (2015) published in BJU International. This study analyzed 17 peer-reviewed papers covering 15,521 men from multiple countries and ethnicities, making it one of the most comprehensive and globally representative datasets available on this topic.

For length, measure along the top (dorsal side) from the pubic bone to the tip, pressing the ruler into the pubic fat pad. For girth, measure the circumference at the midpoint of the shaft using a flexible tape measure. Clinical measurements use the bone-pressed method for length to ensure consistency regardless of body composition.

According to the Veale et al. study, the average erect length is approximately 13.12 cm (5.17 inches) and the average erect girth is approximately 11.66 cm (4.59 inches). The average flaccid length is 9.16 cm (3.61 inches) and flaccid girth is 9.31 cm (3.67 inches). There is significant natural variation around these averages.

A micropenis is a medical condition defined as an erect length more than 2.5 standard deviations below the mean (typically below about 7 cm or 2.75 inches erect). If you fall within the normal range, size concerns are typically psychological rather than medical. If you have concerns affecting your quality of life, speaking with a healthcare provider or therapist can be helpful.

Yes. Belladelli et al. (2023, World Journal of Men’s Health) pooled 75 studies and 55,761 men, and Mostafaei et al. (2025, Urology Research and Practice) pooled 33 studies and 36,883 men grouped by WHO region. They report broadly similar averages and add useful context — including the finding that pooled erect length rose roughly 24% over 29 years, likely from changing measurement methods and lifestyle/environmental factors. We still calculate your percentile from Veale et al. (2015) because it remains the only study publishing full percentile curves (nomograms) rather than just averages.

In clinician-measured studies the differences between regional or ethnic averages are very small (typically under 0.5 cm), while individual variation within any single group spans 7 cm or more — so personal variation is 15–30× larger than any group-average gap. Measurement methods are not standardized across these studies, so cross-region comparisons are rough at best, and the dramatic “world map” charts circulating online are based on unreliable self-reported data.