Blog/Sexual Health

Average penis length: the Size of the Penis and Erection

Wondering why the average penis length varies from person to person? Read on to find out about the Size of the Penis and Erection.

Have you ever wondered what the average size of a penis is? Or perhaps you’ve heard various claims but don’t know what’s true and what’s not? The topic of penis size and erections can be sensitive and intriguing for many people. Some may wonder if they fall within the “normal” range, while others may be curious about what factors can affect the size of a penis and the quality of an erection.

In this article, we will delve into these questions and explore the real data behind average penis length and the intricacies of an erection. We will look closely at scientific studies and data collected from diverse populations to provide a clearer understanding based on credible information. So, let’s dive in and explore the fascinating world of the average penis length and the factors that can influence the size and quality of an erection.

The Data on Average Penis Length

When it comes to determining average penis length and factors affecting it, scientific studies and data collected from diverse populations come into play. Here are some key findings on average penis length and what is considered normal.

Scientific studies and data collected from diverse populations

Scientists have conducted a considerable number of studies to gather data on penis sizes, using similar methodologies. Typically, these studies involve measuring the length and, sometimes, the girth of the penis, giving insight into proportioning and variations.

Through these studies, experts have determined that penis size varies across different regions and ethnicities and that the average penis size is different depending on where you are in the world. An average penis size can range from several inches when erect to even greater variations, making personal acceptance crucial.

Average penis size around the world

Research has shed light on average penis size range in different ethnicities. According to the World Health Organization, the average flaccid penis length is reportedly 9.16 centimeters, while the average erect length is approximately 13.12 centimeters.

However, it is important to note that these values are a rough guideline and can vary significantly between individuals and populations. It’s not uncommon to fall above or below these averages and still be completely normal.

What is considered “normal” and what factors can affect penis size

Penis size within the average range is considered normal, and there is a wide range of “normal” penis sizes. While genetics plays a significant role in determining penis size, other factors such as testosterone levels during puberty and overall health can also affect penis size.

It’s essential to understand that penis size does not determine sexual performance or satisfaction. It is completely okay to have curiosity and concerns about one’s own size, but one must recognize that every individual is unique. Therefore, building a healthy body image and focusing on sexual confidence and communication should be the priority.

Factors That May Affect Penis Size

There are many things that can affect the size of a person’s penis. While genes and individual differences mainly determine penis size, there are other factors that can potentially make a difference. Here are ten things that might affect penis size:


The size of a person’s penis can be inherited from their parents, just like other physical traits.


Hormones like testosterone can impact penis development. Having the right hormone levels during puberty is important for determining penis size. Hormonal imbalances can potentially affect growth.


The age at which someone goes through puberty can affect penis size. Puberty is when the penis grows a lot. Starting puberty late or early might affect the final size.

Overall health:

General health has an impact on penis size. Conditions like obesity or diabetes can affect blood flow and overall vascular health, which could affect penis size and function.

Lifestyle habits:

Certain habits like smoking, drinking too much alcohol, or using drugs can affect penis health. These habits can impact blood vessels and lead to reduced blood flow, potentially influencing penis size.

Body composition:

The ratio of muscle mass to body fat can affect how big a person’s penis looks. If there is a lot of body fat, the base of the penis can get partially hidden, making it seem smaller.

Sexual health:

Conditions like erectile dysfunction (ED) can indirectly affect how someone perceives their penis size. ED can make it hard to get or maintain an erection, which might affect how someone thinks their penis looks.

Psychological factors:

Things like stress, body image issues, and self-esteem can influence how someone thinks about their penis size. Feeling anxious or having a negative body image can lead to concerns about penis size that aren’t based on actual measurements.

Penis exercises:

Some exercises claim to make the penis bigger. These exercises are called penile exercises or “jelqing.” However, there is limited scientific evidence showing they actually work, so it’s important to be careful with these methods.


In some cases, surgeries for penis enlargement are available. However, these procedures come with risks and should only be considered after doing thorough research and consulting qualified healthcare professionals.

Remember, penis size doesn’t define a person’s worth or sexual abilities. Good communication, mutual satisfaction, and emotional intimacy are important for a satisfying sex life, regardless of penis size. If concerns about penis size persist, seeking support from professionals like therapists or sex educators can be helpful.

Does Penis Size Really Matter?

Lots of people worry about whether size of a penis is important. However, this isn’t the only important thing about a sexual relationship. Here are some things to keep in mind:

  • Everyone likes different things.
  • There are many different things that bring sexual pleasure, not just penis size.
  • Feeling good about yourself is very important in having a good sexual experience.
  • Trust and communication matter more than physical traits.
  • Skill and technique are important too.
  • It’s important to have open conversations with your partner about what you both like.
  • The goal should be giving and receiving pleasure, not worrying about penis size.

Remember, penis size isn’t everything when it comes to sexual experiences. What matters most is the quality of the connection between partners.

Can You Increase Your Penis Size?

Penis size is primarily determined genetically and cannot be permanently increased beyond what is predetermined. There are, however, some techniques and treatments that claim to enhance penis size, including:


This is a penis exercise technique that involves repeatedly pulling and stretching the penis. While some men swear by it, its effectiveness is not backed up by scientific research, and it can even be harmful.

Penis enlargement surgery:

Surgical procedures (phalloplasty), like ligamentolysis, involve cutting a ligament in the penis and skin grafting or tissue transfer. However, these procedures are reserved for extreme cases of micro penis and are not recommended for men with average or above average penis size.

Penis pumps:

These devices create a vacuum and draw blood to the penis, potentially leading to temporary enlargement. However, too much suction can cause injury or damage to the penis.

Maintaining a healthy body weight:

Excess weight can lead to excess fat buildup that can make the penis appear smaller. By achieving a healthy weight, you may give the appearance of a slightly larger penis.


Erectile dysfunction (ED) medications are specially made to help men with ED have and keep an erection for sexual activity. These medications, like Viagra, Cialis, Levitra, and Stendra, work by making more blood flow into the penis.

When a man feels sexually excited, the tubes that bring blood to the penis get bigger, letting more blood get to the penis. At the same time, the tubes that normally take blood away from the penis get smaller, trapping the blood in the penis and making it get hard. But in men with ED, this process doesn’t work well, so it’s harder to get or keep an erection.

ED medications, also called PDE5 inhibitors, work by stopping an enzyme called PDE5. This enzyme breaks down a chemical called cGMP, which helps the muscles in the penis relax and the blood flow better. By stopping PDE5, these medications increase the amount of cGMP that helps make erections stronger and last longer.

It’s important to know that these medications don’t change the size of the penis directly. They don’t make the penis bigger or change its physical size. These medications only focus on making it easier to get an erection by improving blood flow to the penis.

It’s important to remember that there is no guaranteed way to permanently enlarge the penis and that any methods claiming to do so may be ineffective and potentially harmful. Instead, focus on overall physical and mental health, which can improve sexual health and performance. If you have concerns about your sexual health or any aspect of your reproductive system, it is best to consult a healthcare professional who can provide accurate information, guidance, and support. They can offer advice specific to your situation and help address any concerns you may have.


The size of a penis can be different for different people, but it doesn’t have a big impact on how satisfying or successful sex is. What matters is how well partners connect emotionally and physically and how well they communicate about what they want and what feels good. Building trust and intimacy, trying different things, and making sure both partners enjoy themselves all help make sex satisfying.

If you worry or feel bad about the size of your penis, it’s important to know that many other things besides size make sex pleasurable. It might help to talk to a healthcare professional or counselor who can give you support and reliable information if you have concerns.

In the end, it’s most important to focus on overall sexual health, having a good relationship, and making sure both partners are happy rather than worrying too much about the size of the penis. Good communication, agreement, and understanding between partners can make sex more satisfying and enjoyable for everyone involved.

By Dr. David Kahan, PhD

  • Education: – B.S. in Kinesiology, 1990, UCLAM. Ed. in Teacher Education, 1991, UCLA Ph.D. in HPER, 1995, The Ohio State University
  • Professional Memberships: American Alliance for Health, Physical Education, Recreation & Dance (AAHPERD), National Association for Kinesiology and Physical Education in Higher Education (NAKPEHE)
  • Research Areas: My initial focus in graduate school was directed at coaching behavior with special emphasis on gender dynamics (e.g., males coaching female athletes). At my first appointment, I changed my focus to better match a major job responsibility—the preparation and supervision of preservice (student teachers and undergraduate field practicum students) teachers. To this end, I spent 5 years on projects to better understand cooperating teacher behavior and beliefs. Beginning in the Fall of 2001, I again switched my focus to issues involving the relationship between physical activity and religion/culture. During a sabbatical year in 2009, I added focus by investigating the impact of social-ecological variables on preschool children’s physical activity.