What is this?
MaleMetrics is an educational tool that compares your measurements
with aggregated, published datasets. It estimates where you sit on a
percentile curve so you can understand how typical your numbers are.
How we calculate results
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Reference data: We use global summary statistics
from large, peer-reviewed studies and clinical reports.
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Percentiles: We estimate your percentile by
interpolating on a normal model around the reported mean and spread.
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Adjustments: Optional age/ancestry inputs nudge the
mean slightly. These are small statistical shifts, not
deterministic.
Estimates are approximate. Small differences (±1–2 mm) are not
meaningful.
Limitations
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Sources may not represent every population equally (sampling and
reporting biases exist).
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Self-measurement can vary; take 2–3 readings on different days and
average.
- Results are informational only and not medical advice.
Data Sources & Methodology
MaleMetrics aggregates published measurements from peer-reviewed
studies. The primary baseline is a large meta-analysis; we supplement
with regional studies where available. We do not use
crowdsourced/self-reports for headline figures.
Core References
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Veale, D., Miles, S., Bramley, S., et al. (2015). “Am I normal?
A systematic review and construction of nomograms for flaccid and
erect penis length and circumference.” BJUI.
DOI: 10.1111/bju.13010
Meta-analysis of 15k+ men across 20+ studies; provides global
percentiles used for our default ranges.
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Herbenick, D., Reece, M., Schick, V., et al. (2014). “Erect
penile length and circumference dimensions of 1,661 sexually active
men.” PLOS ONE.
DOI: 10.1371/journal.pone.0071393
Self-reported U.S. dataset; used for sensitivity checks and
condom-fit discussion, not our main estimates.
FAQ: Why do some sources show bigger averages?
You may see larger averages (e.g., ~14 cm+) on other sites. The
main reason is the measurement method:
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Non–bone pressed erect length (NBPEL): Ruler placed
on the skin at the base, no pressure. This is the standard in large
clinical studies and the basis for our averages (e.g.,
Veale 2015 global mean 13.12 cm).
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Bone-pressed erect length (BPEL): Ruler pressed
into the pubic bone, which typically adds about 1.0 cm compared
to NBPEL. Aggregators that focus on BPEL or include self-reports
will therefore show higher numbers.
MaleMetrics uses NBPEL so your measurement is
directly comparable to the largest, clinician-measured datasets. If
you measure bone-pressed, expect your number to be a little higher
than our NBPEL baselines.
Ancestry & Age Filters
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Ancestry: Evidence by ancestry (European, African,
East Asian, South Asian) mostly comes from smaller regional clinical
studies. We surface differences only where data quality is adequate
and sample sizes are reasonable.
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Age: Limited data by decade; where shown (18–59,
60–69, 70+) we flag wider uncertainty bands.
WHO Note
The World Health Organization does not maintain an official global
database of penile dimensions. References to “WHO data” online
typically refer to regional sexual-health surveys that do not include
standardized penis measurements.
Privacy
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On-device: Your entries stay in your browser;
nothing is uploaded by default.
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Opt-in sharing: If you tap “Allow” and then
“Anonymously add to our data”, we send bucketed values without
identifiers to help refine aggregates.
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Privacy Policy explains more
(cookie-less analytics, what we collect, and why).
Questions or suggestions?
Email us. We read everything
and prioritise fixes that improve clarity, performance, or
accessibility.