factually
Index/Topics/Penile Measurements

Penile Measurements

Average penile measurements across geographic regions and their variations.

Fact-Checks

2 results
Feb 4, 2026

How does average erect penis length change from 20s to 70s by decade?

Published measurement studies show adult erect reaches an average of roughly 5.1–5.3 inches in early adulthood and, based on the sources available, does not show a clear, consistent decade‑by‑decade d...

Jan 22, 2026

What do WHO‑region analyses reveal about geographic variation in erect penis length and sample limitations?

‑region meta‑analyses and recent systematic reviews find statistically detectable differences in average across geographic regions, with pooled global erect means around 13.8–13.9 cm and some regional...