Well? What is Average?
The quick answer is that the
average length is somewhat under 6"
and the circumference is just under
5".
Or to be more exact, the average length seems
to be between 5.65" and 5.87". The average circumference between 4.67" and
4.97". Both depending on how you interpret the data.
If you really want
to go into detail, just keep reading.
Here is the only survey that I've
found that was anything like scientific, so probably gives as accurate an
average as you are going to get. Even with this the raw data is not available,
so I've just done the best I can with it.
Lifestyles Condoms have conducted
research into the average length and circumference of the erect penis during
Spring Break in Cancun and found that the average penis length is 5.877 inches,
with the majority ranging between 5.5 inches and 6.3 inches.
The average
girth is 4.972 inches, with the majority ranging between 4.7 inches and 5.1
inches.
From March 11 to 17, a total 401 males over the age of 18 were
measured, one at a time, by qualified medical staff (protected by gloves) in
private tents at the Dady Rock nightclub in Cancun, Mexico. Of the 401 men, 300
were able to gain an erection for measurement — a success rate of only
75%.
Measurement methodology
The following criteria were
enforced by a doctor and a team of four nurses, who attended each of the seven
nights of the penis size research. Measuring of
length was from the point at the base of the erect penis where the top of
the penile shaft meets the pubic area to the tip of the glans ("head"). For
uncircumcised men, the foreskin was retracted. Measuring
of girth was at mid-shaft around the circumference of the penis when the
penis was erect. Failure to gain an effective erection for measurement
disqualified the volunteer from being included in the data for the calculation
of average erect penis length and girth. 
Environment
The majority of participants were
U.S. college men, but it was not limited to this group. Volunteers were asked
to enter a private area, where they would gain an erection and then call for
the two nurses to measure their erect penis. (
Male fantasy overload.) To ensure the
accuracy of the data, each erect penis was measured by two of the nurses. A
doctor supervised the nurses and all activity.
Volunteers tended to be
groups of friends, which helped ensure a wide range of penis sizes (big and
small) and provide a more accurate average figure.
Sample size
The sample included 401 male volunteers, of which only 300 were "effective"
male volunteers (75 percent), because 101 volunteers (25 percent) could not
gain an erection for measurement. At 300 effective measurements, the study was
twice the size of any previous study that used medical staff to measure penis
size. This method is more accurate and reliable than studies in which
volunteers undertake self-measurement/reporting.
Yes I do
know that these statistics have flaws, but it's the best I could find,
without using any self reported measurements. There is a more in depth analysis
of the results here.
Erect penis length
The average erect
penis length was 5.877 inches (14.928 cm). Standard deviation was 0.825 inches
(2.096 cm) with 54 percent of the effective sample measuring between 5.5 inches
(14 cm) and 6.3 inches (16 cm).
|
Length |
% of men |
|
|
3.50" to 3.75" |
0.2 % |
 |
|
3.75" to 4.00" |
0.3 % |
|
|
4.00" to 4.25" |
0.2 % |
|
|
4.25" to 4.50" |
0.7 % |
|
|
4.50" to 4.75" |
0.8 % |
|
|
4.75" to 5.00" |
2.0 % |
|
|
5.00" to 5.25" |
9.0 % |
|
|
5.25" to 5.50" |
10.8 % |
|
|
5.50" to 5.75" |
24.3 % |
|
|
5.75" to 6.00" |
23.9 % |
|
|
6.00" to 6.25" |
9.3 % |
|
|
6.25" to 6.50" |
6.7 % |
|
|
6.50" to 6.75" |
4.4 % |
|
|
6.75" to 7.00" |
2.9 % |
|
|
7.00" to 7.25" |
1.0 % |
|
|
7.25" to 7.50" |
1.0 % |
|
|
7.50" to 7.75" |
0.9 % |
|
|
7.75" to 8.00" |
0.8 % |
|
|
8.00" to 8.25" |
0.3 % |
|
|
8.25" to 8.50" |
0.3 % |
|
|
8.50" to 8.75" |
0.1 % |
|
|
8.75" to 9.00" |
0.1 % |
|
| Source: Lifestyles Condom Co., 2001 | ||
Erect penis girth
The average erect
penis girth was 4.972 inches (12.63 cm). Standard deviation was 0.508 inches
(1.29 cm) or with 53.33 percent of the effective sample measuring between 4.525
inches (11.5 cm) and 5.118 inches (13 cm).
|
Circumference |
% of men |
|
|
Under 3.00" |
3.3 % |
|
|
3.00" to 3.25" |
0.4 % |
|
|
3.25" to 3.50" |
0.9 % |
|
|
3.50" to 3.75" |
1.1 % |
|
|
3.75" to 4.00" |
4.7 % |
|
|
4.00" to 4.25" |
6.3 % |
|
|
4.25" to 4.50" |
17.1 % |
|
|
4.50" to 4.75" |
11.7 % |
|
|
4.75" to 5.00" |
24.1 % |
|
|
5.00" to 5.25" |
9.9 % |
|
|
5.25" to 5.50" |
11.5 % |
|
|
5.50" to 5.75" |
3.0 % |
|
|
5.75" to 6.00" |
3.9 % |
|
|
6.00" to 6.25" |
0.5 % |
|
|
6.25" to 6.50" |
0.5 % |
|
|
6.50" to 6.75" |
0.1 % |
|
| Source: Lifestyles Condom Co., 2001 | ||
The Geeks out there will notice that this is nowhere near a normal distribution, which makes the mean and standard deviations a bit difficult to interpret. More here.
Even these results might be an
exaggeration
because:
1) Even in
groups, you are more likely to attract customers who feel they have something
worth showing.
2) It's possible that the more cock-sure ones, would find it
easier to get an erection.
3) The statistical distributions mean that the
average is not the same as typical. I'll try too explain that
here.
Still
Not Convinced ?
That average is good -
Then let's try some experiments
Let's go
to - The science page
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