Sexual Relationships 
Sexual Health 
As a way to deal with trolls, here is a statistical breakdown of penis size in the United States.
First off, I would like to say that the mean (connotated as μ later on) is based off of the January 2015 study that established that the average penis length in the US was 5.17 inches long.
References:
https://www.medicalnewstoday.com/articles/271647.php
https://news.sciencemag.org/biology/2015/03/how-big-average-penis
https://www.cnn.com/2015/03/05/health/normal-penis-size/
That said, there are constantly questions on this site, and on the internet in general asking "I'm 15 and my penis is 500 inches long, is this normal?". And one thing that the study also published along with the average length, is the standard deviation, which is 0.8 inches. To explain this simply, Standard Deviation (later connotated as σ) is a number that states the distance a result is from the average.
Now, penis size on a bell curve has a mean (μ) of 5.17, and a Standard Deviation (σ) of 0.8. That means that the exact center average size of the penis in the US is 5.17 inches long, and 68% of ALL penises in the US will fall between 4.37 inches and 5.97 inches long. This is quickly notated as (μ ±σ), or 5.17 ±0.8.
When you look at this bell curve, you will see that the mean is directly in the center, and the farther you get from that center the smaller the amount of results in that category. The way this is broken down for penis size is exactly the same. 68% of all penises in the US will be within 0.8" of the average, 95% of penises will be within 1.6" of the average, and 99.7% of all penises will be within 2.4" from the average. To break this down further, we can say:
-68% of penises are between 4.37" and 5.97"
-95% of penises are between 3.57" and 6.77"
-99.7% of penises are between 2.77" and 7.57"
Now, what does this mean exactly? One, if you are within a single standard deviant of the mean, you fall within the "size doesn't matter" area because you aren't far enough from the average for it to really have an affect on anything. But more importantly, two: we can easily calculate the chance of the ridiculous internet claims actually being true.
Let's take the most common internet penis size claim, 8 inches, and look at the chance of that person not being full of shit. (8.0-5.17)=2.83, (2.83/0.8)=~3.5
- A penis being μ ± 3.5σ has a population range of 0.999534741841929. Which means that only 1 person in 2149 people will fall that far from the mean. Only one in 2149 men in the US have a penis of at least 8 inches.
Now, in case you're wondering where you fall in on this scale, or how likely someone making a ridiculous penis claim is to be lying, I have broken down a short list of sizes and a rough corresponding probability.
About 1 inch, σ=5.21, (μ - 5σ) ~1 in 1,744,278
About 2 inch, σ=3.96, (μ - 4σ) ~1 in 15,787
About 3 inch, σ=2.71, (μ - 3σ) ~1 in 370
About 4 inch, σ=1.46, (μ - 1.5σ) ~1 in 7
About 4.5 inch, σ=0.84, (μ - σ) ~1 in 3
About 5 inch, σ=0.21, (μ) ~2 in 3
About 5.5 inch, σ= 0.33, (μ+0.5σ) ~2 in 3
About 6 inch, σ=1.03, (μ + σ) ~1 in 3
About 6.5 inch, σ=1.66, (μ + 1.5σ) ~1 in 7
About 7 inch, σ=2.29, (μ + 2σ) ~1 in 22
About 7.5 inch, σ=2.91, (μ + 3σ) ~1 in 370
About 8 inch, σ=3.54, (μ + 3.5σ) ~1 in 2149
About 9 inch, σ=4.79, (μ + 4σ) ~1 in 15,787
About 10 inch, σ=6.04, (μ + 6σ) ~1 in 506,797,346
About 11 inch, σ=7.29, (μ + 7σ) ~1 in 390,682,215,445
I am going to stop there, as any further becomes pretty much incalculable. The world's largest penis, 13.5 inches long belonging to Jonah Falcon is almost 10.5σ from the mean, which is a deviation nearing impossibility.
According to these statistics, there MIGHT be one single man in the United States with a penis that is 10 inches long or more.
Probability of results taken using:(https://en.wikipedia.org/wiki/Standard_deviation#Rules_for_normally_distributed_data )
I understand that this is delving far more into this particular subject than is needed, but I did this as a way to show that with most of these claims on here, say 8 inches again as example, only have a 0.00047% chance of being true. And something as ridiculous as a 10 inch penis only has a chance of 0.000000002%.
Now, the average length per country does differ slightly, but for locations such as the US, UK, or Canada, these number are largely the same.
What Girls & Guys Said
12 49I knew my ex was just being malicious. I never doubted myself!
Nice, but there's nothing on girth, which girls care more about sooooo...
So I am at the slightly higher end of average with 5.5 inches. Good to know. Thanks for this myTake mate. I love math and statistics so I enjoyed this.
Most people worry about their body because of a negative self image.
Most negative self image comes from the constant negativity surrounding some body types/parts.
While I applaud your effort, I am sorry to say that it will most likely not reduce the number of dick questions on here.
in the top 0.3%... sweet
yeah i'm still on the high end. also you're talking about something probabilistically, that isn't as simple as a uniform standard deviation. all outliers can't be expected to conform the average, thats not how that works.
its like winning the lottery. the chances of winning it are lower than the chances of getting hit by a car on the way to buy the ticket, but the chances of someone winning it are extremely high. So ultimately the probabilities that someone will have a specific size contradict the probabilities that someone will deviate that far from the average and the true answer lies somewhere between, resulting in a variant of Condorcet's paradox. the part you measure first, the average or the individual, influences the probabilities. but the reality is always transigent, singularly defined. i'm sure we could get into superposition and heisenbergs uncertainty principle and shit to speculate on why that is, but then again, we are just talking about dicks here ;) it is seriously not that big a deal
But here's what we know: -The vast majority of US citizens don't have a 7 inch or longer penis -Every single question about penis size on here is about some guy claiming to have a dick 7 inches or longer
What I find most interesting is that these studies effectively prove that Americans have small penises.
Explains so much, doesn't it?
Men* you forgot to realize that this study is pretty accurate for the entire world with the biggest differences being in Africa and Asia.
Well I am about 7.5 inches and it doesn't bother me if I'm not believed. Hell my partner once said in an argument "just because u hav a big cock, it doesn't make u good in bed". Sorry love I stopped listening at big cock...
My point is this, sure u will get those who lie about penis size but who is gonna say on the net I've a small penis? Very few, and not many will say I'm average, who would care? But plenty on here will boast about size if they have it. So I think size on the net is bigger coz mostly only the bigger guys boast about it.
Hey I felt awesome about myself before this question and I feel way more awesome after reading it.
I have impeccable genes😘
Low key gloating right there.
That was low key? This post almost made me make an update saying "stop posting about your penis, no one cares"
Sorry was in a gloating mood >.>
I don't believe the number of micropenis are so low. Not for a second.
so glad you put this out in the open.
can't tell you how tired i am of men of other races bragging about the average penis size of their country being longer than that of Asian countries according to studies. they're just projecting their insecurities all over the place and i am not kind enough to listen.
Is it really necessary to create a statistic and graph of penis size? It sounds beyond obsession with dicks.
It's necessary when I have to see a hundred questions about how big some guy claims his penis is. The graph is merely a bell curve graph that follows the 68/95/99.7 rule and has percentage markings for each standard deviation.
It looks like the TMI scale used in South Park. And the only reason you're seeing a hundred questions about how big some guy claims his penis is, is because you're looking for those kinds of questions. This site has plenty of categories and ways to refine what type of questions you're looking for. So if you're going to the "How do I look?" section and they refining to only guys questions you're probably gonna see hundreds of penis questions. But if you go to some other section I doubt you'll ever see one at all. I've never seen a penis question in the dating category or the marriage/divorce category.
What about girth or circumference or diameter what are the stats for that
Hahaha oh I love it! !! You Mythbusted the Dick!!
So one in about 2000 men have what I have that around what I estimated. If you think I am lying whatever. Can you combine a girth and length one next I would like to know how much of a freak I am.
Your post was superfluously self-aggrandizing. Thank you for wasting my time.
You chose to not me.
my dick us 10 inches and thick
fuck you mean whyt boy
~Mr Bails Extraordinaire
I hope this take gets featured forever on gag to end all the dick size questions !!!
so you're small, get over it.
Everybody needs to stop obsessing about penis size. It is definitely not the biggest factor when it comes to sex and intimacy... skin texture, hygiene and function are way more important. And a great way to improve yourself in these areas is to use a penis health creme. It is loaded with powerful vitamins and nutrients that will help your penis in these areas. Many more too.. Check it out!
I'm 24 years old and
7.2 hard and 5.4 girth is that good
h ttp://imgur. com/PATEtkB