Americas · 335 million
🇺🇸 Average Size in United States
The US is the largest English-speaking search market for this topic, yet rigorous measured data remains surprisingly limited — most US studies have small samples.
Global mean (erect)
13.12 cm
5.17″ · BJU 2015
Global mean (girth)
11.66 cm
4.59″
United States study
12.9 cm
n=80
how do you compare?
Your percentile against 15,521 men
Your percentile
50th
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Data for United States
United States is one of the countries with a peer-reviewed regional study: Wessells, Lue & McAninch (1996). J Urol, 156, 995-997., with a sample of 80 men. The reported average erect length was 12.9 cm (5.08 inches), compared to the global pooled average of 13.12 cm from the Veale et al. (2015) BJU International meta-analysis.
That difference of 0.22 cm is within typical between-study variation — single-country samples tend to drift by small amounts depending on measurement protocol and participant recruitment. You can read the abstract at https://pubmed.ncbi.nlm.nih.gov/8709382/.
Why country averages are less useful than percentiles
Between-country variation in the scientific literature is small compared to within-country variation — the standard deviation inside any single country is larger than the differences between countries. That is why the percentile calculator above is more useful than a country-mean comparison: it tells you where you stand against the full global distribution, which is what actually matters.
Get the full AI breakdown
Size is only one data point. If you want the full picture — proportions, aesthetics, grooming, photo quality, lighting, and overall vibe scored by an AI that has seen tens of thousands of submissions — get a free rating on ratemyd.. Your photo is deleted instantly after the AI processes it.
Disclaimer: This content is educational / entertainment. It is not medical advice. Individual variation is normal. If you have concerns, consult a healthcare provider.