How to Measure Your Erect Penis Correctly

green cactus in back pot beside tape measure

At some point in their lives, most men have grabbed a ruler or tape measure and pressed it against their erect penis. Whether out of curiosity, anxiety or just to kill some time, this is a common practice.

Using non-stretchable, flexible measuring tape (like tailor’s tape), start at the base of your erect penis and push into the pubic bone, making sure to get past any excess fat or hair.


At one point or another, most men have grabbed a ruler or tape measure and measured their erect penis. It’s something of a male rite of passage or perhaps a way to kill time on a rainy Sunday afternoon. But what many people don’t realize is that they may not be measuring their penis correctly.

The best way to accurately measure your erect penis is while it is in an upright position and at room temperature. It’s also important that the groin is completely dry and free of any fat or hair. The measurement should be taken from the base of the erect penis to the tip. It’s also important to note that researchers prefer to measure the top side of the penis, rather than the bottom or from the side. This is because it’s less prone to skewing from the foreskin and can be more accurate.

When it comes to penis length, research shows that the average erect penis is about 5.1 to 5.5 inches. This is smaller than many men think and can lead to anxiety about whether their penis will satisfy a sexual partner. However, a study published in 2019 suggests that penile size does not seem to have a significant impact on sexual pleasure.


While measuring the length of a man’s penis is fairly easy, there are more complicated things to consider when it comes to circumference (aka “girth”). For example, you need to know how wide your penis is when it’s erect. This is important because it can help you pick the right condom size, which can minimize your chances of getting STIs during unprotected sex.

To measure the circumference of your penis, you’ll need a flexible fabric tape measure or tailor’s tape. You should get the penis as erect as possible, and be sure to compress any extra fat or foreskin. This will help you get a more accurate measurement. It’s also a good idea to take the measurements in different places around the shaft, as this can help you determine the average circumference of your penis.

Many men believe that their penis will be too small when they are erect, which can lead to anxiety about sexual performance. However, it’s important to realize that your girth and length aren’t something you can control, so you should focus on other factors, like your level of testosterone and sexual behavior. To avoid unnecessary stress, you should learn how to properly measure your erect penis so that you can make informed decisions about sexual health and protection.


Many men have grabbed a ruler or tape measure and pressed it against their erect penis at some point in their lives. Some have even done this multiple times. Unfortunately, they may have been selling themselves short. In a recent video on the UroChannel, a urologist and sexologist breaks down some myths and misconceptions about measuring penis size. He also explains how to do it properly.

First, you’ll need a flexible fabric measuring tape. A standard ruler will work, but it’s best to use a tape measure specifically designed for measuring circumference. It’s not recommended to use a retractable builder’s tape, as one wrong move can result in a severe injury.

You can take a measurement of your penis’s girth while it is flaccid or erect, but if you are using it to determine the proper size condom for you, make sure you use an erect measurement. Also, keep in mind that your penis size can fluctuate throughout the day due to fatigue, stress, or level of arousal, so you’ll want to take several measurements over the course of a few days and find an average.

To measure the width of your erect penis, simply place the end of your tape or ruler at the base/root of the head and push into the pubic bone as far as you can while being mindful not to compress any fat or hair underneath. Continue this all the way to the tip of your glans, or head.


Unlike length and circumference, thickness is a simple measurement that can be made by anyone. The key is to take the measurement with the penis fully erect and at room temperature. You’ll also need a tailor’s tape, although a flexible ruler might work in a pinch. Position the tape around the middle of your shaft and gently push into it, as you would to test for a cock. Once you’ve got a good measurement, write it down.

When it comes to measuring thickness, experts say the “right” way is to start at the base and gently push into the testicles, pushing past any pubic hair or excess fat that might get in the way. You can even go all the way to the pubic bone, but don’t press so hard that you lose the rounded shape of the shaft, which is the actual girth measurement.

While there are many old wives tales about correlating penis size with things like your shoe size, your height, and even your age or the deepness of your voice, research has shown that there is no correlation between a man’s size and any of these factors. The only factor that seems to correlate with penis size is whether a man is erect or flaccid. This is why it’s important to use a standardized method for measuring your penis.

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