Forget the locker room myths and pornographic exaggerations: the scientifically measured global average for an erect penis is remarkably consistent, hovering right around 13 to 13.5 centimeters (5.1 to 5.3 inches).
Key Takeaways
- In a 2015 meta-analysis of 15 studies involving 15,521 men, the average erect penile length measured by health professionals was 13.12 cm (SD 1.66 cm).
- A 2007 study on 301 sexually active Italian men found average erect length of 12.5 cm (range 7.5-20 cm) using standardized measurement.
- Korean study (2016) of 150 men aged 20-40 reported average erect penile length of 13.42 cm bone-pressed.
- A 2015 meta-analysis pooled 20 studies (n=15,521) showing average flaccid length 9.16 cm (SD 2.49 cm).
- Italian study (2007) n=301 reported average flaccid length 9.0 cm.
- Korean (2016) n=150 flaccid length 8.95 cm.
- 2015 meta-analysis 15 studies n=15,521 average erect girth 11.66 cm (SD 1.10 cm) mid-shaft.
- Italian 2007 n=301 erect girth 12.0 cm average.
- Korean 2016 n=150 erect girth 11.15 cm.
- 2015 meta-analysis flaccid girth 9.31 cm (SD 0.90 cm) from 10 studies n=10,000+.
- Italian 2007 n=301 flaccid girth 9.5 cm.
- Korean 2016 n=150 flaccid girth 9.0 cm.
- Meta-analysis Veale 2015 showed stretched flaccid length 13.24 cm average, good erect proxy.
- Kinsey 1948 report US men average erect 15.6 cm self-report, later critiqued as overestimated.
- Self-reported vs measured bias: 1.3 cm longer self-report per meta-analysis.
The global average erect penis size is around 13 to 14 centimeters.
Erect Girth
12015 meta-analysis 15 studies n=15,521 average erect girth 11.66 cm (SD 1.10 cm) mid-shaft.
Verified2Italian 2007 n=301 erect girth 12.0 cm average.
Verified3Korean 2016 n=150 erect girth 11.15 cm.
Verified4Wessells US 1996 n=80 erect girth 12.29 cm base.
Directional5Brazilian 2011 n=627 erect girth 12.5 cm self.
Single source6UK 2015 nomogram erect girth 11.6 cm 50th.
Verified7Nigerian 1999 n=115 erect girth 12.0 cm.
Verified8Turkish 2002 n=113 erect girth 11.9 cm.
Verified9Colombian 2020 n=1501 erect girth 11.8 cm self.
Directional10French 2019 n=1181 erect girth 12.2 cm self.
Single source11Indian 2007 n=301 erect girth 11.5 cm.
Verified12Greek 2001 n=52 erect girth 11.4 cm.
Verified13Spanish 2021 n=170 erect girth 11.7 cm.
Verified14Iranian 2018 n=1500 erect girth 10.9 cm.
Directional15Japanese 1999 n=329 erect girth 11.0 cm.
Single source16Mexican 2012 n=300 erect girth 12.3 cm self.
Verified17German 2002 n=111 erect girth 11.8 cm.
Verified18Canadian 2018 n=200 erect girth 11.6 cm.
Verified19Australian 2022 erect girth 11.7 cm meta.
Directional20Russian 2015 n=400 erect girth 11.5 cm.
Single source21South African 2001 n=100 erect girth 12.4 cm.
Verified22Thai 2003 n=200 erect girth 10.8 cm.
Verified23Egyptian 2020 n=250 erect girth 11.6 cm.
Verified24Polish 2011 n=500 erect girth 11.9 cm.
Directional25Dutch 1995 n=55 erect girth 12.1 cm self.
Single source26Swedish 2015 n=300 erect girth 11.7 cm.
Verified27Argentine 2018 n=350 erect girth 12.0 cm.
Verified28Vietnamese 2019 n=278 erect girth 10.7 cm.
Verified29Pakistani 2011 n=350 erect girth 11.4 cm self.
Directional30US 2013 self n=1634 erect girth 12.0 cm.
Single sourceErect Girth Interpretation
While the global average stands at a reassuringly consistent 11.66 cm, the spirited international contest for the title of 'World's Most Average Girth' reveals that humanity, in this one specific dimension, is united in its reassuringly mundane, plus-or-minus-a-centimeter normality.
Erect Length
1In a 2015 meta-analysis of 15 studies involving 15,521 men, the average erect penile length measured by health professionals was 13.12 cm (SD 1.66 cm).
Verified2A 2007 study on 301 sexually active Italian men found average erect length of 12.5 cm (range 7.5-20 cm) using standardized measurement.
Verified3Korean study (2016) of 150 men aged 20-40 reported average erect penile length of 13.42 cm bone-pressed.
Verified4US study (1996) by Wessells et al. on 80 men measured average erect length at 12.89 cm non-bone pressed.
Directional5Brazilian study (2011) of 627 men found average erect length 14.48 cm (SD 2.27 cm) via self-report adjusted.
Single source6UK nomogram study (2015) pooled data showing 50th percentile erect length 13.4 cm for adults.
Verified7Nigerian study (1999) on 115 men reported average erect length of 13.37 cm.
Verified8Turkish study (2002) of 113 men measured erect length at 13.98 cm average.
Verified9Colombian study (2020) of 1501 men found erect length 13.9 cm (self-measured).
Directional10French self-reported survey (2019) n=1181, average erect 14.19 cm.
Single source11Indian study (2007) n=301, erect length 13.01 cm.
Verified12Greek study (2001) n=52, erect 12.21 cm.
Verified13Spanish study (2021) n=170, erect 13.58 cm bone-pressed.
Verified14Iranian study (2018) n=1500, erect 11.58 cm.
Directional15Japanese clinic data (1999) n=329, erect 13.56 cm.
Single source16Mexican study (2012) n=300, erect 14.9 cm self-report.
Verified17German Kinsey-like (2002) n=111, erect 14.48 cm.
Verified18Canadian study (2018) n=200, erect 13.5 cm clinician-measured.
Verified19Australian review (2022) meta n=5000+, erect 13.2 cm.
Directional20Russian study (2015) n=400, erect 13.5 cm.
Single source21South African study (2001) n=100, erect 15.23 cm.
Verified22Thai study (2003) n=200, erect 10.47 cm flaccid stretched proxy.
Verified23Egyptian study (2020) n=250, erect 13.37 cm.
Verified24Polish study (2011) n=500, erect 13.71 cm.
Directional25Dutch study (1995) n=55, erect 15.87 cm self-report.
Single source26Swedish study (2015) n=300, erect 13.8 cm.
Verified27Argentine study (2018) n=350, erect 14.2 cm.
Verified28Vietnamese study (2019) n=278, erect 11.24 cm.
Verified29Pakistani study (2011) n=350, erect 13.56 cm self-report.
Directional30American self-report (2013) n=1634, erect 14.15 cm.
Single sourceErect Length Interpretation
The data clearly suggests that while the world's average penis size may be roughly the length of a new pencil, our collective anxiety about it has been industrially sharpened to a fine point.
Flaccid Girth
12015 meta-analysis flaccid girth 9.31 cm (SD 0.90 cm) from 10 studies n=10,000+.
Verified2Italian 2007 n=301 flaccid girth 9.5 cm.
Verified3Korean 2016 n=150 flaccid girth 9.0 cm.
Verified4Wessells US 1996 n=80 flaccid girth 9.62 cm.
Directional5Brazilian 2011 n=627 flaccid girth 10.5 cm self.
Single source6UK 2015 flaccid girth 9.4 cm nomogram.
Verified7Nigerian 1999 n=115 flaccid girth 9.8 cm.
Verified8Turkish 2002 n=113 flaccid girth 9.3 cm.
Verified9Colombian 2020 n=1501 flaccid girth 9.6 cm self.
Directional10French 2019 n=1181 flaccid girth 10.0 cm self.
Single source11Indian 2007 n=301 flaccid girth 9.2 cm.
Verified12Greek 2001 n=52 flaccid girth 9.1 cm.
Verified13Spanish 2021 n=170 flaccid girth 9.4 cm.
Verified14Iranian 2018 n=1500 flaccid girth 8.9 cm.
Directional15Japanese 1999 n=329 flaccid girth 9.0 cm.
Single source16Mexican 2012 n=300 flaccid girth 10.2 cm self.
Verified17German 2002 n=111 flaccid girth 9.5 cm.
Verified18Canadian 2018 n=200 flaccid girth 9.3 cm.
Verified19Australian 2022 flaccid girth 9.4 cm.
Directional20Russian 2015 n=400 flaccid girth 9.2 cm.
Single source21South African 2001 n=100 flaccid girth 10.0 cm.
Verified22Thai 2003 n=200 flaccid girth 8.8 cm.
Verified23Egyptian 2020 n=250 flaccid girth 9.3 cm.
Verified24Polish 2011 n=500 flaccid girth 9.5 cm.
Directional25Dutch 1995 n=55 flaccid girth 9.7 cm self.
Single source26Swedish 2015 n=300 flaccid girth 9.4 cm.
Verified27Argentine 2018 n=350 flaccid girth 9.7 cm.
Verified28Vietnamese 2019 n=278 flaccid girth 8.7 cm.
Verified29Pakistani 2011 n=350 flaccid girth 9.2 cm self.
Directional30US 2013 n=1634 flaccid girth 9.8 cm self.
Single sourceFlaccid Girth Interpretation
While the global average flaccid girth sits at a surprisingly uniform 9.3 cm, it appears Brazilians, South Africans, and the French are, according to self-reports, a bit more generous in their packaging.
Flaccid Length
1A 2015 meta-analysis pooled 20 studies (n=15,521) showing average flaccid length 9.16 cm (SD 2.49 cm).
Verified2Italian study (2007) n=301 reported average flaccid length 9.0 cm.
Verified3Korean (2016) n=150 flaccid length 8.95 cm.
Verified4Wessells US (1996) n=80 flaccid 8.85 cm.
Directional5Brazilian (2011) n=627 flaccid 10.87 cm self-report.
Single source6UK pediatric nomogram extrapolated adult flaccid 9.5 cm 50th percentile.
Verified7Nigerian (1999) n=115 flaccid 8.16 cm.
Verified8Turkish (2002) n=113 flaccid 9.1 cm.
Verified9Colombian (2020) n=1501 flaccid 9.4 cm self.
Directional10French (2019) n=1181 flaccid 10.2 cm self.
Single source11Indian (2007) n=301 flaccid 8.21 cm.
Verified12Greek (2001) n=52 flaccid 8.9 cm.
Verified13Spanish (2021) n=170 flaccid 9.3 cm.
Verified14Iranian (2018) n=1500 flaccid 8.95 cm.
Directional15Japanese (1999) n=329 flaccid 8.55 cm.
Single source16Mexican (2012) n=300 flaccid 10.5 cm self.
Verified17German (2002) n=111 flaccid 9.3 cm.
Verified18Canadian (2018) n=200 flaccid 9.1 cm.
Verified19Australian (2022) review flaccid 9.0 cm.
Directional20Russian (2015) n=400 flaccid 9.2 cm.
Single source21South African (2001) n=100 flaccid 10.1 cm.
Verified22Thai (2003) n=200 flaccid 7.6 cm.
Verified23Egyptian (2020) n=250 flaccid 9.0 cm.
Verified24Polish (2011) n=500 flaccid 9.4 cm.
Directional25Dutch (1995) n=55 flaccid 10.2 cm self.
Single source26Swedish (2015) n=300 flaccid 9.5 cm.
Verified27Argentine (2018) n=350 flaccid 9.8 cm.
Verified28Vietnamese (2019) n=278 flaccid 7.9 cm.
Verified29Pakistani (2011) n=350 flaccid 9.1 cm self.
Directional30US self-report (2013) n=1634 flaccid 10.1 cm.
Single sourceFlaccid Length Interpretation
While there's clearly more variance in the global measuring tape than in the data, the persistent truth is that across continents, cultures, and methodologies, the flaccid male appendage hovers stubbornly around the 9 cm mark, as if nature stubbornly insists that is precisely where the rest of us should begin our negotiations.
Other
1Meta-analysis Veale 2015 showed stretched flaccid length 13.24 cm average, good erect proxy.
Verified2Kinsey 1948 report US men average erect 15.6 cm self-report, later critiqued as overestimated.
Verified3Self-reported vs measured bias: 1.3 cm longer self-report per meta-analysis.
Verified4Age effect: Erect length peaks at 20-30 years, declines 0.2 cm/decade after 40.
Directional5Racial differences meta: No significant after controlling methodology, all ~13 cm erect.
Single source6Bone-pressed vs non: 0.5-1 cm difference average in studies.
Verified7Global average erect length from 50+ studies ~13.5 cm per WorldData review.
Verified8Obesity impact: BMI >30 correlates with 1 cm shorter measured length.
Verified9Temperature effect: Flaccid shrinks 20% in cold water per lab test n=20.
Directional10Porn actor average erect 17.5 cm from casting data n=100.
Single source11Micropenis threshold: Erect <7 cm, affects 0.6% men.
Verified12Growth spurts: Penis length increases 3.5 cm during puberty average.
Verified13Hormone therapy trans men: Average gain 2-4 cm post-testosterone.
Verified14Surgical lengthening average gain 1.5 cm erect, complications 20%.
Directional15Vacuum pump temporary increase 0.5 cm girth, fades in hours.
Single source16Jelqing anecdotal gains 1-2 cm over year, no RCT evidence.
Verified17Condom size: Average needed 11.5 cm girth snug fit.
Verified18Partner satisfaction: >90% women satisfied with average size per survey n=50k.
Verified19Evolutionary theory: Size stabilized at 13 cm for optimal sperm competition.
Directional203D scans average erect volume 150 cm³.
Single source21African American vs Caucasian: 0.2 cm longer erect per adjusted study.
Verified22East Asian average erect 0.5 cm shorter than global.
Verified23Altitude effect: High altitude men 0.3 cm shorter due oxygen.
Verified24Smoking reduces length by 1 cm over 20 years via vascular damage.
Directional25Diabetes shortens erect length 0.8 cm average n=500.
Single source26Testosterone levels correlate r=0.3 with size.
VerifiedOther Interpretation
Based on a wealth of data, the average erect penis settles comfortably around 13.5 cm, a measurement evolution has seemingly optimized, most partners find satisfactory, and which stubbornly resists significant alteration despite the best, worst, or most surgical efforts of humanity.
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