What is Normal or Average Penis Size?

What is the normal or average penis size? One global study of 15,000 men found that the average flaccid penis is 3.6 inches long and has a girth of 3.66 inches. In the same study the average erect length was 5.16 inches, and the girth was 4.59 inches. Guys want to know if they have an average penis or if their penis is on the small side. Let’s take an in-depth at what is a normal penis.

Average measurements were:
Flaccid Length: 3.6 in
Flaccid Girth: 3.66 in
Erect Length: 5.16 in
Erect Girth: 4.59 in

Another study of American men had similar results, with an average self-reported erect length of 5.6 inches and a girth of 4.8 inches. Self-reported sizes can be unreliable (duh!), so let’s look at some professional measurements.

In a study where men were measures by medical professionals the average penis length was 3.5 inches flaccid and 5.1 inches erect. The study also found that the size of the erect penis did not correlate with flaccid length. Science has proven that saying: “I’m a grower, not a shower.” It’s the truth.

Yet another study involving almost 800 men undergoing medically induced erections found the average penis length was 5.6 inches from the pubic bone to the penile tip, and penis girth was 4.5 inches.

Interestingly, a 2020 study found that when asked most men believe the average erect length is 6 inches, when in fact, the average is much smaller at 5.16 inches. This means that most guys overestimate their penis by almost an inch!

Penis Size Calculator

The Penis Size Calculator provides you with a comparison of your penis against standardized data from various world regions. By entering the length and width (girth) of your penis, you can see how you compare.

ERECT LENGTH

Measure from the base to the tip on the top side, in inches or centimeters.

ERECT GIRTH

Measure the circumference or girth, typically measured around the thickest part, in inches or centimeters.

ERECT VOLUME

fl oz

Number of people in a room

Does Penis Size Vary by Nationality?

Interestingly, penis size averages don’t vary much around the world. Research from various countries shows flaccid lengths range from 2.8 to 3.9 inches, while erect lengths are between 4.7 and 6.3 inches.

Average measurements were as follows:
Flaccid Length: 2.8–3.9 in
Flaccid Girth: 3.5–3.9 in
Erect Length: 4.7–6.3 in
Erect Girth: 4.7 in

What is the Reality of Penis Length?

Lets take a look at the real facts about penis length. This chart shows a distribution of penis sizes. The average erect length is 5.5 inches. Almost 100% of men fall between 3 and 8 inches. Sizes outside this range are very rare.

Let’s talk about standard deviation. Standard deviation is a way to measure how spread-out sizes are from the average. In the case of penis length, the standard deviation is about 0.7 inches. This is a quite small. Meaning there is not a lot of difference in penis size between men.

When we say, “plus or minus one standard deviation,” we mean 0.7 inches above and below the average. So, one standard deviation covers lengths between 5 and 6 inches. This range includes about 68% of men. In other words, almost 70% of men have a penis length between 5 and 6 inches.

Plus or minus 3 standard deviations: This includes 99.7% of men. It means you’d have to search for a long time to find someone outside the range of 3.4 inches to 7.6 inches. Only 1 in 666 men are larger than 7.6 inches.

Plus or minus 2 standard deviations: This includes 95% of men. Imagine all the men you know or interact with in a normal week. You’d have to look hard to find someone outside the range of 4.1 inches to 6.9 inches. That means 95% of men fall within 4 to 7 inches.

Length SD Explained

Girth SD Explained

What is the Reality of Penis Girth?

Let’s look at girth measurements and how you compare: Penis Girth Real Facts.

Average erect girth is 4.6 inches. Most men fall between 2.8 inches and 6.4 inches, with sizes outside this range being very rare.

So again, let’s consider standard deviation for girth. Think of standard deviation as a measure of how spread-out sizes are from the average. For girth the standard deviation is 0.6 inches. This is a small range, smaller than for length.

Plus or minus 1 standard deviation: This means 0.6 inches above and below the average girth. One standard deviation covers girths between 4 and 5.2 inches. This includes 68% of men. In other words, about 70% of men have a girth between 4 inches and 5.2 inches.

Plus or minus 2 standard deviations: This covers 95% of men. Imagine all the men you know. You’d have to look around for a awhile to find someone outside the range of 3.4 inches to 5.8 inches. 95% of men fall within the range of 3.4 to 5.8 inches in girth.

Plus or minus 3 standard deviations: This covers 99.7% of men. It means you’d have to search for a long time to find someone outside the range of 2.8 inches to 6.4 inches. Only 1 in 666 men are larger than 6.4 inches.

How to Measure Penis Size Correctly?

So, if you’re curious about your own size, here’s how to measure it correctly. The correct way to measure is called erect bone-pressed length. For length, press a ruler against your pubic bone and measure from the base to the tip of your erect penis. For girth, wrap a measuring tape around the widest part. Accurate measurements are crucial!

Do Partners Care About Penis Size?

Worried about your length? Don’t be! Studies show that most women don’t consider penis length important. In fact, girth matters more for sexual satisfaction. In a survey, 77% of women said length wasn’t a big deal, while 4 out of 5 women preferred girth over length for better sexual satisfaction.

Preferences for Penis Size

So, what do women want in a penis? A 2015 study asked women to choose from 3D-printed penis models of various sizes. The models ranged in size from 4–8.5 inches in length and 2.5–7 inches in circumference. Interestingly women had different preferences when they considered a long-term partner vs a one-night stand. For long-term partners, the preferred length was 6.3 inches with a girth of 4.8 inches. For one-time partners, they preferred slightly larger sizes. It turns out preferences for one-time partners was a length of 6.5 inches and a girth of 5 inches. Bigger than the average guy and what they want in a long-term partner.

Size Preference:

Long-term partners:
6.3 Length
4.8 Girth

One-time partners:
6.5 Length
5 Girth

What About Gay Men?

Anxiety about penis size isn’t just a straight issue. A survey in the UK found that 38% of gay men worry about their size. A survey of more than 550 gay men by the Gay Men’s Health Project found that 49% think size does not matter, however 37% of guys said it did and 51% of guys says a partner’s size affected the kind of sex they had.

Impact of Obesity and Age on Penis Size

Did you know that your weight can affect how your penis looks? A higher BMI, or more weight can make your penis appear shorter because of extra fat around the base. Losing weight can improve its perceived length. Shedding pounds can be a way to “gain inches.” Age also has a slight impact, but the difference is usually less than 1 cm so very minimal.

Race and Penis Size

Do black men have bigger penises? The idea that black men have larger penises is a myth created by the pornography industry. There is no scientific data to support this claim. Studies that suggest otherwise often rely on self-reported data, which can be unreliable.

In the reliable studies that have examined penis size by country or race, European nations (predominantly white men) tend to show slightly larger averages, around 6.1 inches. In comparison, studies show black men with averages around 5.1 to 5.4 inches.

Asian men, particularly from the Far East and Indian subcontinent, tend to have slightly lower averages, around 4.9 to 5.1 inches.

While there are some differences in average sizes by race, they are not significant. It’s important to remember that these averages apply to populations, not individuals. Penis size can vary widely among individuals, regardless of race. Observations about an individual do not represent their entire racial group.

Frequently Asked Questions

Is my penis normal size?

Normal erect penis size is 5.1 to 5.5 inches long and 4.5 inches thick. A flaccid penis is on average 3.6 inches long.

What is the average size penis?

The average erect penis size is 5.1 to 5.5 inches long and 4.5 inches thick. Flaccid penises average 3.6 inches in length.

Am I big enough?

The 5 to 6-inch range when erect, is within the normal range. Even if you're slightly below this, studies show length is not a major factor in sexual satisfaction. At GMG we know that it is girth that really matters!

What is a good penis size?

It’s hard to say. There is no official "good" size. Some surveys suggest 5.5 to 6 inches is considered "ideal" by some partners.

How do I compare to the average penis size?

Answer:

Flaccid average: 3.6 inches
Erect average: 5.1 to 5.5 inches
Erect girth: 4.5 inches

If you're close to these numbers, you're average.

What size penis is small?

A micropenis is defined as less than 2.5 inches erect. Anything below 4 inches erect is considered smaller than average.

Do women care about penis size

Research shows that women prioritize girth over length and that size matters less than skill, and connection.

Does girth matter more than length to gay men?

For bottoms, girth provides more sensation than length. A thicker penis (4.5 inches or more in girth) creates a more full and pleasurable experience than a longer but thinner penis

How do I measure my penis size correctly

Length: Use a ruler from the base (pubic bone) to the tip while erect. Press the ruler firmly against the pubic bone to account for fat.
Girth: Wrap a measuring tape around the thickest part of the shaft.

Penis size chart

Size (Erect)	Classification
< 2.5 inches	Micropenis (Rare)
3-4 inches	Smaller than average
5-5.5 inches	Average
6-7 inches	Above average
7+ inches	Large

Is 4.5 inches long enough

4.5-inchs erect is slightly below the average range (5.1-5.5 inches). Studies show that most partners prioritize girth over length for satisfaction.

Is 5 inches a good size?

A 5-inch erect penis is average. Most studies place the average at 5.1 to 5.5 inches.

Is 5.5 inches a good length?

Yes, 5.5 inches is at the higher end of average. Many partners consider this an ideal size because it’s not too small or too large.

Is 6 inches a good size for a penis?

6-inches erect is above average, as the normal range is 5.1-5.5 inches.

Is 6.5 inches a big penis?

6.5 inches when erect is larger than average. It’s bigger than most, but remember girth plays a bigger role in satisfaction.

Is 7 inches big?

A 7-inch penis is above average. Size doesn’t correlate with better performance. Ana a long but skinny penis provides less satisfaction for partners

Is 3 inches girth too small?

A 3-inch girth is below average (average is 4.5 inches). You would benefit from girth enhancement to improve thickness and confidence.

Is 4 inches girth normal?

4 inches in girth is slightly below average. Partners think that thickness is more important than length.

Is 4.5 inches a good girth?

4.5 inches is the average girth. Why be average?

Is 5 inches a thick girth?

Answer: Yes, 5 inches in girth is slightly above average.

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Is 5.5 inches girth too big

A 5.5-inch girth is above average and on the larger side. Partners will enjoy the extra sensation.

Is 6 inches in girth rare

Yes, a 6-inch girth is rare, only a small percentage of men are this thick.

Is 6.5 inches girth too big

A 6.5-inch girth is rare and significantly above average. This size may be challenging for some partners.

How Can I Get a Bigger Penis?

We know the internet is full of many claims about how you can make your penis thicker or longer. The truth is that most of these methods don't work. If you want a thicker penis we feel that enhancement with fillers is really safest and most effective choice for you.