penis size statistics

Penis Size Statistics

Penis Size Averages Inches
Average American penis size in length while flaccid 3.89 inches
Average American penis size in length while erect 6.21 inches
Average penis circumference while flaccid 3.75 inches
Average penis circumference while erect 4.85 inches
Semen Production Percentages Percent
Testicles and epididymes 5 %
Seminal vesicles 62 %
Prostate gland 28 %
Bulbourethral and urethral glands 5 %
The average volume of semen produced at ejaculation 3 ml
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The most accurate measurement of the human penis comes from several measurements at different times since there is natural minor variability in size due to arousal level, time of day, room temperature, frequency of sexual activity, and reliability of measurement. Most of human penis growth happens between infancy and the age of five, and between about one year after the onset of puberty and, at latest, approximately 17 years of age.

Statistic Verification
Source: Journal for Sex Research (vol. 24,pp. 177-183) , World Health Organisation
Research Date: January 11th, 2016

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