Penis Size Visualizer
Set your erect length and girth and see both drawn to scale beside the clinical average of 13.1 cm (5.2 in) and a few everyday objects. Your numbers never leave your browser.
Your measurements
Drag a slider and the drawing updates as you go.
You vs the average
Length and girth, drawn to one scale
You vs. everyday objects
You've seen the length next to the average. Add your girth on the main calculator to get your percentile and your condom fit.
How to read it: both outlines share one scale, so height tracks length and width tracks girth. They are in proportion to each other, not life-size on your screen.
What an average penis looks like, to scale
Erect, the clinical average is 13.12 cm (5.17 in) long and 11.66 cm (4.59 in) around. Divide that circumference by π and you get the width: about 3.7 cm (1.5 in), a shade narrower than a table-tennis ball.
Those means come from Veale et al. (2015), who pooled clinician measurements from up to 15,521 men, so nobody got to round up. About two in three men fall between 11.5 and 14.8 cm (4.5 to 5.8 in).
On a ruler the gaps look small. 6 in (15.2 cm), a length only 1 man in 10 exceeds, is just 2.1 cm (0.8 in) longer than average: roughly the width of a thumb.
How rare is each size?
At 6 in (15.2 cm) you are at the 90th percentile: 1 man in 10 is longer. At 7 in (17.8 cm) the odds fall to about 1 in 400, far rarer than its online reputation.
| Erect length | Percentile | What it means |
|---|---|---|
| 4 in 10.2 cm | 4th | 4% are shorter |
| 4.5 in 11.4 cm | 15th | 15% are shorter |
| 5 in 12.7 cm | 40th | 40% are shorter |
| Average 5.2 in · 13.1 cm | 50th | 1 in 2 is longer |
| 5.5 in 14 cm | 70th | 1 in 3 is longer |
| 6 in 15.2 cm | 90th | 1 in 10 is longer |
| 6.5 in 16.5 cm | 98th | 1 in 49 is longer |
| 7 in 17.8 cm | 99.75th | 1 in 400 is longer |
| 7.5 in 19.1 cm | >99.9th | Fewer than 1 in 1,000 is longer |
| 8 in 20.3 cm | >99.9th | Fewer than 1 in 1,000 is longer |
Percentiles assume erect length follows a normal curve. That fits well in the middle and only loosely at the extremes, so past the 99.9th percentile we stop quoting exact odds. Measured without pressing into the fat pad? Add about 1 cm (0.4 in) before you find your row.
Why the sizes you see online look bigger
Because almost none of them were measured the way a clinic measures.
Self-reports run long
In a survey of 130 college men, 30.8% said they were 7 inches or longer, and the men who scored higher on a social-desirability scale reported bigger sizes (King et al., 2019). Measured data puts that share at about 0.25%, or 1 in 400. Our own analysis of 88 national averages, most of them self-reported, lands 1.0 cm (7.7%) above the clinical mean. We call it the size-inflation gap.
Angles distort, in both directions
A phone held close exaggerates whatever sits nearest the lens, and adult films cast for size, then frame for it. Your own view does the opposite. Looking down at yourself foreshortens the shaft, so you see less length than someone beside you would. The visualizer draws every outline side-on and on one scale, which is the fair comparison.
Method moves the number
The clinical figures are bone-pressed: the ruler pushes into the fat pad until it meets the pubic bone. Measured without pressing, the same penis reads about 1 cm (0.4 in) shorter, more if the fat pad is thick. Rounding up adds a few millimetres of its own. The measuring guide and bone-pressed vs non-pressed cover the details.
Common questions
What does an average penis look like?
Erect, about 13.1 cm (5.2 in) long and 11.7 cm (4.6 in) around, which makes it roughly 3.7 cm (1.5 in) wide. Picture one and a half credit cards end to end, a shade narrower than a table-tennis ball. Those are clinician-measured averages from Veale et al. (2015). About two in three men fall between 11.5 and 14.8 cm.
Is the visualizer to scale?
Relative to itself, yes. Every outline and bar is drawn on one scale, so twice the length draws twice as tall, and width follows girth (very thick or very thin settings are capped so the drawing stays readable). It is not life-size on your screen, because screens differ in size and pixel density. For a life-size reference, use a ruler: a credit card is 8.56 cm on its long side.
How rare is a 7-inch penis?
About 1 in 400. 7 in (17.8 cm) sits near the 99.75th percentile of clinician-measured erect length, so roughly 0.25% of men are longer. It sounds common online because men over-report: in one college survey, 30.8% claimed 7 inches or more.
Does girth or length matter more?
There is no clean winner. In the best preference study, women handling 3D-printed models picked 16 cm (6.3 in) long and 12.2 cm (4.8 in) around for a long-term partner, and 16.3 cm by 12.7 cm for a one-off (Prause et al., 2015). Both picks sit above the clinical average. Girth is what decides condom fit, and because it varies less between men, each centimetre of girth moves your percentile about 1.5 times as far as a centimetre of length.
How do I measure for the visualizer?
Measure erect, in a warm room. For length, press a rigid ruler gently into the fat pad above the penis until it meets the pubic bone, then read along the top to the tip. That bone-pressed method is the one behind the clinical average. For girth, wrap a soft tape once around the thickest part of the shaft, snug but not tight. Either unit works: the visualizer switches between centimetres and inches.
Why does mine look smaller when I look down?
Foreshortening. From above you see the shaft at a steep angle, which hides much of its length, while someone at your side sees the full profile. A side-on mirror view is closer to the truth. The visualizer skips the angle problem altogether: it draws from your measured numbers, side-on.
Sources
- Veale D, Miles S, Bramley S, Muir G, Hodsoll J. Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15,521 men. BJU Int. 2015. PubMed
- Prause N, Park J, Leung S, Miller G. Women's Preferences for Penis Size: A New Research Method Using Selection among 3D Models. PLoS ONE. 2015. PubMed
- King BM, Duncan LM, Clinkenbeard KM, Rutland MB, Ryan KM. Social desirability and young men's self-reports of penis size. J Sex Marital Ther. 2019;45(5):452–455. DOI
For education, not diagnosis. If something about your size or shape worries you, a GP or urologist can measure it properly.