Penis Size Percentile Calculator
Find your length & girth percentile on the curve, plus estimated volume, from the Veale et al. (2015) nomograms of 15,521 men.
Length along the top, pressed to the pubic bone; girth around the middle of the shaft. How to measure
Measured without pressing to the bone?
Ruler pressed to the pubic bone, the way research studies measure length.
ExampleClose to the median
50thlength percentile51stgirth percentile
Half of men measure more and half less. Enter yours above to see where you fall.
- Condom fit
- Regular / standard · 52–56 mm
See the full report
Everything on one page to keep, with the studies behind it. Print it or save a PDF; your measurements stay on this device.
- Length and girth percentiles
- Condom fit
- World regions
- What women said they prefer
Educational. Self-measurement varies. Not medical advice. Why
Grower or shower?How much length you gain from flaccid to erect
A grower gains a lot of length from flaccid to erect; a shower looks about the same size either way.
Where the line comes from. Yafi et al. (2018, International Journal of Impotence Research) measured 274 men at a urology clinic, flaccid and then fully erect. The median gain was 4 cm, ranging from 1 cm to 7 cm, and the authors used it as the line: a gain of 4 cm or more made a grower (26% of the men, who gained 5.3 cm on average) and less made a shower (74%, who gained 3.1 cm). The two groups had the same flaccid length on average, yet erect the growers averaged 15.5 cm and the showers 13.1 cm.
Both are normal. Flaccid size changes with cold, warmth and stress, so the gain you measure can differ from one day to the next. Flaccid length is also a poor guide to erect length: in 80 men measured by Wessells et al. (1996, Journal of Urology), flaccid size did not accurately predict erect length. That is why your percentiles above use your erect measurements when you give them.
Condom fitBy girth, as nominal width
Condoms are sized by nominal width (lay-flat width), roughly half your girth. Based on your girth of 11.7 cm:
Regular / standard · 52–56 mm nominal width. Most condoms on the shelf are made for this range.
General guidance from published fit charts, not a product endorsement. Always check the pack’s stated nominal width. A good fit stays put without pinching: too tight can break, too loose can slip off.
What size do women say they prefer?From one study where women chose among 3D models
Erect length
Example 13.1 cm
Erect girth
Example 11.7 cm
The example’s length is 2.9 cm under the women’s long-term pick (16.0 cm), and its girth is 0.5 cm under it (12.2 cm).
The length the women picked is longer than about 96 in 100 men measured by clinicians, so most men, and most of these women’s partners, are shorter than it. Girth, which they remembered almost exactly, sat nearer the middle: the long-term pick is around the 69th percentile.
What the study did. 75 women aged 18 to 65 in California held and chose among 33 blue plastic models, picking a size for a long-term partner and for a one-night partner. 15 of them chose not to answer. It is one small study with plastic shapes, not bodies, and no study has tied a woman’s body to the size she prefers.
What size do women prefer? The study, its limits and the questions people ask →
Estimated volumeLength and girth combined
That is about the same as the median (142 cm³) for erect measurements.
A geometric estimate treating the shaft as a cylinder: volume = girth² × length ÷ 4π, using bone-pressed length so it reflects anatomy rather than the visible portion. Because length and girth are reported separately in the research, there is no published percentile curve for volume, so this is shown as a comparison, not a rank. See volume at every percentile.
Study reference values (erect)Veale et al. (2015), clinician-measured
Clinician-measured, bone-pressed means from Veale et al. (2015); their curves are normal, so the average is also the 50th percentile used above.
Length (cm)
Girth (cm)
Reading your resultWhat a percentile does and doesn’t tell you
- Wide variation in size is normal and healthy.
- Self-measurement may not be as accurate as clinical measurement.
- Penis size has no correlation with masculinity, sexual satisfaction, or fertility.
- Most concerns about size are psychological rather than medical.
- The data comes from Veale et al. (2015), a review of 15,521 men measured by clinicians. If you have medical concerns, consult a healthcare professional.
How this works: Method, 5 sources, Checked against 11 worked examples,
How this works
Method
Your length and girth are compared with the erect or flaccid percentile tables from a 2015 review of 15,521 men measured by clinicians: between the 5th and 95th percentiles the tool interpolates between table points, and beyond them it extends the bell curve (limited to 0.1–99.9). A non-bone-pressed length gets 1.3 cm added to match the studies’ bone-pressed method, and volume is estimated as a cylinder, girth² × length ÷ 4π. With both a flaccid and an erect length, the gain between them is a grower at 4 cm or more and a shower below, the line a 2018 study of 274 men drew at its median gain.
Sources
- Am I normal? A systematic review and construction of nomograms for flaccid and erect penile length and circumference (BJU International, 2015)
- Worldwide Temporal Trends in Penile Length: A Systematic Review and Meta-Analysis (World Journal of Men’s Health, 2023)
- A Systematic Review and Meta-Analysis of Penis Length and Circumference According to WHO Regions (Urology Research and Practice, 2025)
- Grower or shower? Predictors of change in penile length from the flaccid to erect state (International Journal of Impotence Research, 2018)
- Women’s preferences for penis size: a new research method using selection among 3D models (PLoS ONE, 2015)
How it’s tested
11 worked examples for this page are checked by automated tests before every release: given the inputs, the tool must show the expected answer.
Privacy
On your device. Nothing you enter or open leaves this browser. About privacy labels
Changes
- Get your full report: your percentiles, grower or shower, condom fit, world regions and the studies on one page to print or save as a PDF, kept on your device.
- See how your size compares with what women picked in a study with 3D models, with a page on what the study found and its limits.
- Add your flaccid length beside your erect one to see whether you are a grower or a shower, against a published 4 cm line.
- The share card now sits open right under your result, redesigned, in three sizes and three looks.
- How the percentiles are worked out and the studies behind them now show under the tool, in “How this works”.
- Redesigned: your result is marked on a bell curve, with a labelled example until you enter your own measurements.
- Corrected the percentile tables so the median matches the study’s published averages (erect length 13.12 cm rather than 13.5 cm).
- Added an estimated volume, and condom fit is no longer suggested from a flaccid girth.
Newer data & how regions compare
The percentiles above use Veale et al. (2015), still the only study publishing full percentile curves (15,521 men). Two larger, newer meta-analyses add useful context:
Belladelli et al. (2023)
75 studies · 55,761 men
Pooled erect length 13.9 cm. Strikingly, erect length rose ~24% over 29 years (12.3→15.2 cm), likely from measurement and lifestyle/environmental factors, not genetics.
Mostafaei et al. (2025)
33 studies · 36,883 men
Grouped clinician-measured data by WHO region (table below). Overall stretched length 12.8 cm, erect length 13.8 cm.
How the datasets compare
erect length| Study | Men | Erect length | Method |
|---|---|---|---|
| Veale et al. (2015) | 15,521 | 13.1 cm ± 1.7 | Clinician-measured · bone-pressed |
| Belladelli et al. (2023) | 55,761 | 13.9 cm | Pooled meta-analysis (75 studies) |
| Mostafaei et al. (2025) | 36,883 | 13.8 cm | Clinician-measured · by WHO region |
All three broadly agree; only Veale publishes full percentile curves, so the percentiles above are based on it.
Read this before the table
Between-region averages differ by only a small amount, while variation within any region spans 7 cm or more. Individual difference dwarfs group difference by 15–30×. Measurement methods aren't standardized across these studies, sample sizes vary widely, and some regions are thinly sampled. As the authors put it: “the differences within a region are larger than [those] between the regions.” The viral “world map” figures online are self-reported and not reliable. Treat the table as rough context, not a ranking.
Stretched length by WHO region
cmEnter a measurement above to see where you land among regional averages.
Real scale: the spread from top region to bottom is only ~3.6 cm, far smaller than the 7 cm+ variation within any one region. Source: Mostafaei et al. (2025), Urology Research and Practice.
The science, in plain terms
Most men cluster tightly
Roughly 2 in 3 men fall within about 1.6 cm (0.6 in) of the average erect length. The curve is narrow; extremes are genuinely rare.
Size & satisfaction
Large studies find little to no correlation between penis size and partner sexual satisfaction. Other factors matter far more.
Built on real data
These percentiles come from Veale et al. (2015), a meta-analysis pooling 17 clinician-measured studies and 15,521 men worldwide.
Worry is common, and treatable
Most men anxious about size are within the normal range. Persistent distress responds well to support and therapy.
No proven shortcuts
No pill, pump, or exercise has solid evidence for permanent enlargement. Be skeptical of anything that promises it.
Frequently Asked Questions
How are the percentiles calculated?
Percentiles are calculated by comparing your measurements against the distribution data from the Veale et al. (2015) systematic review, which analyzed measurements from over 15,000 men. If you are at the 60th percentile, your measurement is larger than 60% of the men in the study population. Linear interpolation is used between known data points for precision.
Is this the same as a penis size calculator or a dick size calculator?
Yes. Those all describe the same thing. This page uses the clinical terms “penile length” and “penile girth” because that is how the underlying research reports measurements, but it answers the same question either way: how your measurements compare against the measured population. There is no difference in what is being measured, only in vocabulary.
Am I a grower or a shower?
Enter your erect length and add your flaccid length. A grower gains a lot of length from flaccid to erect; a shower stays about the same size. The line this page uses comes from Yafi et al. (2018, International Journal of Impotence Research), who measured 274 men at a urology clinic: the median gain was 4.0 cm (1.6 in), so a gain of 4 cm or more counts as a grower (26% of the men) and less as a shower (74%). Both are normal, and the two groups had the same flaccid length on average.
Does flaccid size predict erect size?
Not well. In a study of 80 men measured flaccid and then erect (Wessells et al., 1996, Journal of Urology), flaccid size did not accurately predict erect length; stretched length came closest. Flaccid size also changes with cold, warmth and stress. That is why this calculator ranks your erect measurements when you give them, and uses the flaccid ones for the grower or shower comparison.
What data sources does this calculator use?
This calculator uses data from the systematic review by Veale et al. (2015) published in BJU International. This study analyzed 17 peer-reviewed papers covering 15,521 men from multiple countries and ethnicities, making it one of the most comprehensive and globally representative datasets available on this topic.
How is volume calculated, and why is there no volume percentile?
Volume is a geometric estimate that models the shaft as a cylinder: volume = girth² × length ÷ 4π. It always uses bone-pressed length, so it reflects anatomy rather than the portion visible above the fat pad. There is no percentile rank for volume because the research reports length and girth as separate distributions and does not publish how strongly the two correlate. Deriving a volume percentile from them would be invented precision. So volume is shown as a comparison against the median instead of a rank.
What is the correct measurement methodology?
For length, measure along the top (dorsal side) from the pubic bone to the tip, pressing the ruler into the pubic fat pad. For girth, measure the circumference at the midpoint of the shaft using a flexible tape measure. Clinical measurements use the bone-pressed method for length to ensure consistency regardless of body composition.
What is considered average?
According to the Veale et al. study, the average erect length is approximately 13.12 cm (5.17 inches) and the average erect girth is approximately 11.66 cm (4.59 inches). The average flaccid length is 9.16 cm (3.61 inches) and flaccid girth is 9.31 cm (3.67 inches). There is significant natural variation around these averages.
When should I consult a doctor about size concerns?
A micropenis is a medical condition defined as an erect length more than 2.5 standard deviations below the mean (typically below about 7 cm or 2.75 inches erect). If you fall within the normal range, size concerns are typically psychological rather than medical. If you have concerns affecting your quality of life, speaking with a healthcare provider or therapist can be helpful.
Is there newer data than the 2015 study?
Yes. Belladelli et al. (2023, World Journal of Men’s Health) pooled 75 studies and 55,761 men, and Mostafaei et al. (2025, Urology Research and Practice) pooled 33 studies and 36,883 men grouped by WHO region. They report broadly similar averages and add useful context, including the finding that pooled erect length rose roughly 24% over 29 years, likely from changing measurement methods and lifestyle/environmental factors. We still calculate your percentile from Veale et al. (2015) because it remains the only study publishing full percentile curves (nomograms) rather than just averages.
Does penis size differ by region or ethnicity?
In clinician-measured studies the differences between regional or ethnic averages are very small (typically under 0.5 cm), while individual variation within any single group spans 7 cm or more, so personal variation is 15–30× larger than any group-average gap. Measurement methods are not standardized across these studies, so cross-region comparisons are rough at best, and the dramatic “world map” charts circulating online are based on unreliable self-reported data.