What is the average penis size?

The average erect penis is 13.1 cm (5.2 in) long and 11.7 cm (4.6 in) around; soft, it is 9.2 cm (3.6 in). These are the pooled measurements of 15,521 men in Veale et al. (2015), the most-cited study on the subject, where clinicians did the measuring.

What is considered average?

Statistically, average means within one standard deviation of the mean, which covers about 2 in 3 men: an erect length of 11.5 cm (4.5 in) to 14.8 cm (5.8 in). Anything in that range is typical.

Is 5 inches small?

5 inches (12.7 cm) erect is longer than 40% of men. That is just under the 5.2-inch average and well inside the normal range. Read more: 5-inch penis →

Is 5.5 inches big?

5.5 inches (14 cm) erect is longer than 69.6% of men. About 1 man in 3 is longer. Read more: 5.5-inch penis →

Is 6 inches big?

6 inches (15.2 cm) erect is longer than 89.9% of men. About 1 man in 10 is longer. Read more: 6-inch penis →

Is 6.5 inches big?

6.5 inches (16.5 cm) erect is longer than 97.9% of men. About 1 man in 49 is longer. Read more: 6.5-inch penis →

Is 7 inches big?

7 inches (17.8 cm) erect is longer than 99.8% of men. About 1 man in 400 is longer. Read more: 7-inch penis →

Is 8 inches big?

8 inches (20.3 cm) erect is longer than 99.9% of men. Fewer than 1 in 10,000 men are longer. Read more: 8-inch penis →

Every size from 3 to 10 inches in the penis size chart →

What is the average girth?

The average erect girth is 11.7 cm (4.6 in), measured around the middle of the shaft. About 2 in 3 men are between 10.6 cm (4.2 in) and 12.8 cm (5 in).

Is a 5 inch girth good?

A 5-inch (12.7 cm) girth is thicker than 83% of men — about 1 man in 6 is thicker. It takes a condom about 58 mm wide.

Penis volume calculator: length and girth together

Length and girth together make the volume, the closest single number to how big a penis is overall. The calculator treats the shaft as a cylinder: girth × girth × length ÷ 4π. At the average erect length (13.1 cm (5.2 in)) and girth (11.7 cm (4.6 in)) that is about 142 cm³. Girth counts twice: an extra centimetre of girth adds about twice as much volume as an extra centimetre of length. Your result above shows your volume and how many times the average it is.

Does size matter?

Multiple peer-reviewed studies find that size is not the main factor in sexual satisfaction for most partners: confidence, communication and technique are consistently rated as more important. The worry about being enough is usually bigger than any practical difference.

How to measure penis size

Measure erect, standing, with a rigid ruler along the top. A soft tape follows the curve and adds length.
Press the ruler into the fat pad until it touches the pubic bone: that is where length starts. Measure to the tip, not past it.
That is bone-pressed length, the one the studies use. Measured from the skin instead, the same penis comes out shorter, and more so the more belly fat there is.
Measure twice, on different days, and take the average.

How to measure girth

Erect, wrap a soft measuring tape around the middle of the shaft. No tape? A strip of paper or a string works: mark where it meets, then lay it on the ruler.
Snug, not squeezed: the tape lies flat without denting the skin.
Use the middle of the shaft, as the studies do. At the thickest part, often near the base, the number comes out bigger, so compare like with like.

Flaccid vs erect: growers and showers

A flaccid penis averages 9.2 cm (3.6 in) and an erect one 13.1 cm (5.2 in). How much a penis grows varies a lot from man to man: some grow a lot from soft to hard (growers), others change less (showers), so flaccid size says little about erect size. Compare like with like: erect with erect, or soft with the flaccid setting above.

Why your measurement changes

Cold, stress and nerves pull a flaccid penis in, sometimes by centimetres, and warmth lets it out again. An erection is fullest a few minutes into arousal, not in the first one. Weight matters too: fat at the base covers part of the shaft, which is why bone-pressed length is the fair number. Measure in the same conditions each time, and the numbers will agree.

Can you make your penis bigger?

Pills, creams and exercises like jelqing have no good evidence that they add size, and some carry real risks. Three things have been studied.

Traction devices (penis extenders), worn for hours a day over several months, added around 1–2 cm of flaccid and stretched length in small studies; the gain in erect length is smaller and less certain. Vacuum pumps draw blood in and make the penis look fuller for a while, but the effect wears off: they treat erection problems, they don’t grow anything.

Surgical penile enhancement, such as cutting the suspensory ligament or girth fillers, carries real risks: scarring, lost sensation, a new curve, or erections that point lower. Urologists generally keep it for medical conditions, not for an average size.

The change that reliably shows: losing belly fat uncovers length the fat pad was hiding. And if you notice a painful curve, a lump or a sudden change in shape (Peyronie’s disease), see a urologist.

When does a penis stop growing?

Most of the growth happens in puberty and is done by the late teens, usually around 16 to 18. After that, adult size does not change in any lasting way. What changes is how much of it shows, which follows your weight, and how full an erection gets, which follows blood flow and can drop with age, smoking or diabetes.

How this penis percentile calculator works

It is a dick size calculator with one source: the average and spread of each measurement in Veale et al. (2015), assuming a normal distribution. Your percentile is the share of men below you; "1 in N" is how many men it takes to find one above you. Volume treats the penis as a cylinder, so it is a model, not a measurement.

Where does this data come from?

Veale et al. (2015). BJU International, 115(6), 978-986. A systematic review of 17 studies and up to 15,521 men, measured by health professionals with a standard method; self-reported sizes were left out. Read the study

For entertainment and education; not medical advice. If something worries you, a doctor can measure properly.