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Erect length of a male penis
Regarding the length of the adult fully erect penis (measured along the top of the penis from the groin to the tip), several studies have been performed.
Studies that have relied on self-measurement, including those from Internet surveys, consistently reported a higher average than those that used medical
or scientific researchers to perform the measurements.
Academic and scientific studies
A study published in the September 1996 Journal of Urology concluded that average erect length was 12.9 cm (5.08 in).
A study published in the December 2000 International Journal of Impotence Research found that average erect penis length was 13.6 cm (5.35 in).
Sample of college students on spring break
A study conducted by LifeStyles Condoms during 2001 Spring Break in Cancun Mexico, found an average of 14.9 cm (5.9 in) with a standard deviation of 2.1 cm (0.8 in).
Self measurement surveys
An Internet survey performed by Sizesurvey.com found an average of 16 cm (6.4 in).
An Internet survey performed by Jackinworld.com found an average of 15.6 cm (6.1 in).
Erect Penis circumference
Similar results exist regarding studies of the circumference of the adult fully erect penis (with the measurement taken mid-shaft).
Just as with length, those studies that relied on self-measurement consistently reported a higher average than those that had staff
take the measurements, possibly indicating exaggeration when the penis is not scientifically measured.
A study conducted by LifeStyles Condoms during 2001 Spring Break in Cancúund an average of 12.6 cm (5.0 in) with a standard deviation of 1.3 cm (0.5 in).
Statistics on erect penis lengths for white college age menas measured by The Alfred C. Kinsey Institute for Sex Research
(measured from where the penis meets the body to its tip):
| percent |
length |
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0.2 percent
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3.75 inches
|
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0.3 percent
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4 inches
|
|
0.2 percent
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4.25 inches
|
|
1.7 percent
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4.5 inches
|
|
0.8 percent
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4.75 inches
|
|
4.2 percent
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5 inches
|
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4.4 percent
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5.25 inches
|
|
10.7 percent
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5.5 inches
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8 percent
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5.75 inches
|
|
23.9 percent
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6 inches
|
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8.8 percent
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6.25 inches
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14.3 percent
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6.5 inches
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5.7 percent
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6.75 inches
|
|
9.5 percent
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7 inches
|
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1.8 percent
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7.25 inches
|
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2.9 percent
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7.5 inches
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|
1 percent
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7.75 inches
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|
1 percent
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8 inches
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0.3 percent
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8.25 inches
|
|
0.3 percent
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8.5 inches
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0.1 percent
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8.75 inches
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|
0.1 percent
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9 inches
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(note: 1 inch = 2.54 cm, 0.25 inch = 0.635 cm)
This information was gathered from other sources on the web, including
wikipedia
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