Average Girth of a Penis

It's not all about length! Penises come in all different lengths and no surprise, they come in all different girths or widths too. Some are wide and short, some are tall and thin. It's like going to the DMV and seeing all the different shapes of people. Penises are basically the same.

Penis girth definitely does matter, but exactly how much it matters really depends on you (and your partner). It's more about personal preference than hard and fast rules. If you want to know more, read up on what the ideal penis girth is, according to women.

So that said, lets get down to the meat of it: what exactly is the average girth of a penis anyway?

A note on terms: girth is one way to describe what we're talking about here, but it's not the only way. Average penis diameter, average penis thickness, average penis circumference, these are just different ways to talk about the same thing, which is how big around the penis is :)

💪 Average Erect Penis Girth

The average erect penis thickness measurement is the number that most guys and their partners will care about. This study, published in 2015, looked at penis data from over 15,000 men. They found that the average male penis girth was 4.59 inches (that's 11.66 cm).

Measuring Penis Girth

Now that you know what the average penis girth is, you might be wondering how one might go about measuring such a thing. Well that's pretty simple. You just measure around whichever part is thickest. This doesn't include the head of the penis, and you also can't include your balls in the measurement😉. Anything else is fair game.

To do that, a measuring tape is ideal, but if you just have a ruler, you can take a piece of string, or even just a couple pieces of toilet paper, wrap that around the thickest part of the shaft, make a mark and then measure that on your ruler.

If you want more details, we have a whole page on how to measure penis girth that can sort you out.

🥀 Average Flaccid Penis Girth

Less important, especially to those of us who are growers, not showers, is the average flaccid girth of a penis. The same study mentioned above (and in the references below) looked at over 15,000 penises and found that the average flaccid penis girth is 3.66 inches (that's 9.31 cm).

Penis Girth Standard Deviation

The study listed below in the references section also looked at the standard deviation of the penis girth data. They found that the erect penis girth standard deviation is 0.43 inches (1.1 cm).

What does that mean? It means that about 68% of men have an erect penis girth somewhere between 4.16 inches (10.57 cm) and 5.02 inches (12.75 cm)

Less important, but the flaccid penis girth standard deviation is 0.35 inches (0.9 cm). That means that about 68% of men have a flaccid penis girth somewhere between 4.24 inches (10.77 cm) and 4.94 inches (12.55 cm).

You can use the penis girth chart above to get a bit more granular look at the data, or head to our penis size calculator to get a better idea of how you measure up, and what your penis score is!