Methodology and editorial standards
How the site chooses sources, calculates approximate percentiles, labels limitations, and decides when not to build a calculator.
1. Prefer measured and representative evidence
Body percentiles use measured NCHS/NHANES data rather than anonymous self-report. Earnings use the Bureau of Labor Statistics. Marriage and living arrangements use Census estimates. Puberty guidance uses NICHD and CDC resources.
2. Match the tool to the evidence
Height, weight, and waist support approximate percentile interpolation. Activity can be compared with published guidance. Testosterone receives reference context but no diagnosis. Puberty and dating do not receive scores.
3. Show the reference population
A number belongs to a country, time, age range, sampling frame, measurement method, and definition. Pages name those limits rather than presenting “the average man” as universal.
4. Keep percentile separate from judgment
Percentile is rank within a reference distribution. It does not measure health, attractiveness, masculinity, competence, morality, maturity, or personal value.
5. Calculator interpolation
Adult height, weight, and waist tools estimate a percentile linearly between the official 5th, 10th, 15th, 25th, 50th, 75th, 85th, 90th, and 95th percentile points. Values outside the table are reported only as below the 5th or above the 95th.
6. Youth safety
The growing-up section collects no intimate measurement and offers no photo upload, account, comments, private messaging, or sexual-product funnel.
7. Privacy
All calculator logic runs locally in the browser. This build contains no analytics, advertising pixel, cookie, account system, or submission endpoint.
8. Updating
Body tables should be refreshed when a newer comparable NCHS reference report appears. BLS earnings should be updated quarterly if the page is promoted as current. Census and sleep pages should be reviewed when new comparable releases appear.
Safety-content standards
Urgent steps appear before statistics. Pages avoid graphic detail, victim blaming, forced disclosure, intimate image collection, personalized legal claims, and simplistic identity labeling. Consent, behavior, attraction, and identity are treated as distinct concepts. Youth pages never request intimate measurements or photographs.
Sensitive survey definitions are stated explicitly. A survey measure of same-sex contact is not silently relabeled as consensual, and a social term such as virginity is not presented as a medical diagnosis.
Youth development ranges
V5 distinguishes descriptive reference bands from personal ranking. Age-based penis and testicle charts use published cross-sectional data from one regional cohort and are explicitly labeled non-universal. Clinical stage information is shown separately because chronological age and puberty stage are not interchangeable.
Question-based editorial design
Pages lead with a short answer, then ordinary variation, practical steps, and separate routine versus urgent warning signs. No page claims named clinical review unless a real reviewer has completed it.
Family and life information
Family-structure statistics describe household arrangements, not whether a particular home is loving or safe. Different family structures are not pathologized, while safety concerns are never excused by kinship.