Average Size in United States
Based on compiled international research data, the average erect length in United States is 13.6 cm (5.35 in), with an average erect girth of 12.0 cm (4.72 in).
This measurement places United States statistically above the global average of 13.12 cm.
Average erect penis length
vs. global 13.12 cm
13.6 cm (5.35 in)
+0.5 cm vs. the global average. The United States mean sits at roughly the 61% percentile of the global distribution.
Length comparison
Average erect penis girth
vs. global 11.66 cm
12.0 cm (4.72 in)
+0.3 cm vs. the global average, roughly the 62% percentile of the global distribution.
Girth comparison
United States penis size chart
The compiled country average next to the published studies measured in United States and the global clinical average. Erect values in cm.
Erect length
Erect girth
Green bars are individual studies, details and sources below. Studies differ in age, region and method, so they rarely match the compiled figure exactly.
Aggregated country figures mix studies with different measurement methods, and self-reported values tend to run high. The clinical standard is the bone-pressed technique used by the Veale et al. 2015 meta-analysis. See how we measure for the exact protocol.
Data quality
- Source: Compiled from public aggregators (e.g. WorldData.info) — not a controlled national study.
- Sample type: Unknown for this country; the underlying sources mix clinician-measured studies and self-reported surveys (self-reports skew high).
- Reliability: Low–moderate — plausible range, but still an aggregated estimate, not a clinical measurement.
For context, the clinical global baseline (Veale et al. 2015, n = 15,521, clinician-measured): 13.12 cm length (SD 1.66), 11.66 cm girth (SD 1.10).
›Published national studies (2)
For transparency: individual studies measured in this country. Clinician-measured studies come first. Our charts and comparisons keep using the aggregated figure so all countries stay comparable.
erect length 12.90 cm
n = 80 · measured by clinicians, induced erection
Wessells H, Lue TF, McAninch JW. Penile length in the flaccid and erect states: guidelines for penile augmentation. J Urol. 1996;156(3):995–997. Source
erect length 14.15 cm · erect girth 12.23 cm
n = 1,661 · self-measured at home (tends to skew high)
Herbenick D, Reece M, Schick V, Sanders SA. Erect penile length and circumference dimensions of 1,661 sexually active men in the United States. J Sex Med. 2014;11(1):93–101. Source
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Frequently asked questions about United States
What is the average penis size in United States?
The average erect penis size in United States is 13.6 cm (5.35 in) in length and 12.0 cm (4.72 in) in girth, according to compiled international data.
Is United States above or below the global average?
United States's average erect length of 13.6 cm is 0.5 cm above the global average of 13.12 cm reported by the Veale et al. 2015 meta-analysis.