Sources

Data Sources

The Delusion Calculator uses real demographic data from official government statistics, national health surveys, and reputable research organizations. Below is a comprehensive list of all data sources used for each of our 40+ country calculators, along with explanations of what each source provides.

How We Use the Data

For each country, we gather data across several categories:

• Demographics & Age Distribution — Population age breakdowns from national census data
• Marriage & Relationship Status — Marital status rates, cohabitation patterns, and divorce statistics
• Income Distribution — Median income and income percentile data from labor/statistics bureaus
• Height & Body Composition — Average heights and BMI/obesity rates from health surveys (CDC, NHS, WHO, etc.)
• Sexuality & LGBTQ+ Identification — Self-identification rates from polls and census data
• Race & Ethnicity — Population composition from census data using country-specific categories
• Eye & Hair Color — Population estimates from genetic studies and demographic surveys

All percentages are estimates based on the most recent available data. Where exact figures aren’t available for a specific country, we use data from the closest comparable source.

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Sources by Country

United States

• US Census Bureau — demographics, marital status, fertility
• Bureau of Labor Statistics — income distribution
• CDC NHANES — BMI, height
• Gallup — LGBTQ+ identification
• World Population Review — hair color

Canada

• Statistics Canada — demographics, income
• Health Canada — BMI, height
• Gallup / Ipsos — sexuality

United Kingdom

• ONS — demographics, income
• NHS Digital — BMI, height
• Gallup / ONS — sexuality

Germany

• Destatis — demographics, income
• RKI — BMI, height
• LSVD / Ipsos — sexuality

Australia

• ABS — demographics, income
• AIHW — BMI, height
• ABS / Gallup — sexuality

India

• Census of India — demographics
• NSSO / PLFS — income
• NFHS — BMI, height

Poland

• GUS — demographics, income
• NIZP-PZH — BMI, height
• CBOS / Ipsos — sexuality

Netherlands

• CBS — demographics, income
• RIVM — BMI, height
• SCP / Ipsos — sexuality

France

• INSEE — demographics, income
• DREES — BMI, height
• IFOP / Ipsos — sexuality

Brazil

• IBGE — demographics, income
• VIGITEL / MS — BMI, height
• Datafolha / Ipsos — sexuality

Croatia

• DZS — demographics, income
• HZJZ — BMI, height
• Ipsos — sexuality

Sweden

• SCB — demographics, income
• Folkhalsomyndigheten — BMI, height
• SCB / Ipsos — sexuality

Spain

• INE — demographics, income
• ENSE — BMI, height
• CIS / Ipsos — sexuality

Switzerland

• BFS — demographics, income
• BAG — BMI, height
• Ipsos — sexuality

Italy

• ISTAT — demographics, income
• ISS — BMI, height
• ISTAT / Ipsos — sexuality

Russian Federation

• Rosstat — demographics, income
• GNIC PM — BMI, height
• Levada / VTsIOM — sexuality

Mexico

• INEGI — demographics, income
• ENSANUT — BMI, height
• INEGI / Ipsos — sexuality

Finland

• Statistics Finland — demographics, income
• THL — BMI, height
• Ipsos — sexuality

Austria

• Statistik Austria — demographics, income
• GÖG — BMI, height
• Ipsos — sexuality

Romania

• INS — demographics, income
• INSP — BMI, height
• Ipsos — sexuality

Belgium

• Statbel — demographics, income
• Sciensano — BMI, height
• Ipsos — sexuality

Norway

• SSB — demographics, income
• FHI — BMI, height
• SSB / Ipsos — sexuality

Denmark

• DST — demographics, income
• SST — BMI, height
• DST / Ipsos — sexuality

Singapore

• DOS — demographics, income
• HPB — BMI, height
• Ipsos — sexuality

Turkey

• TurkStat — demographics, income
• HSGM — BMI, height
• Ipsos — sexuality

South Africa

• Stats SA — demographics, income
• SADHS — BMI, height
• Ipsos — sexuality

Czech Republic

• CZSO — demographics, income
• UZIS — BMI, height
• Ipsos — sexuality

New Zealand

• Stats NZ — demographics, income
• Ministry of Health — BMI, height
• Stats NZ / Gallup — sexuality

Ireland

• CSO — demographics, income
• HSE — BMI, height
• CSO / Ipsos — sexuality

Hungary

• KSH — demographics, income
• NNK — BMI, height
• Ipsos — sexuality

Portugal

• INE — demographics, income
• DGS — BMI, height
• Ipsos — sexuality

Philippines

• PSA — demographics, income
• FNRI — BMI, height
• Ipsos — sexuality

Serbia

• RZS — demographics, income
• IZJZ — BMI, height
• Ipsos — sexuality

Israel

• CBS — demographics, income
• MoH — BMI, height
• Ipsos — sexuality

Japan

• e-Stat — demographics, income
• MHLW — BMI, height
• Ipsos — sexuality

Bulgaria

• NSI — demographics, income
• NCPHA — BMI, height
• Ipsos — sexuality

Slovenia

• SURS — demographics, income
• NIJZ — BMI, height
• Ipsos — sexuality

South Korea

• KOSTAT — demographics, income
• KDCA — BMI, height
• Ipsos — sexuality

Greece

• ELSTAT — demographics, income
• EODY — BMI, height
• Ipsos — sexuality

Argentina

• INDEC — demographics, income
• ENFR — BMI, height
• Ipsos — sexuality

Lithuania

• OSP — demographics, income
• HI — BMI, height
• Ipsos — sexuality

Colombia

• DANE — demographics, income
• ENSIN — BMI, height
• Ipsos — sexuality

Bosnia And Herzegovina

• BHAS — demographics, income
• ZZJZ — BMI, height
• Ipsos — sexuality

Hong Kong

• C&SD — demographics, income
• DH — BMI, height
• Ipsos — sexuality

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General Methodology Notes

• All calculations are performed client-side in your browser — no data is sent to our servers.
• Each filter dimension is treated as an independent probability factor. The final percentage is the product of all selected filter percentages.
• When a filter is set to “Any” or all checkboxes are selected, that dimension contributes a multiplier of 1.0 (100%), meaning it has no effect on the result.
• Income data is adjusted for each country’s currency and cost of living. Income brackets reflect local purchasing power.
• Height data is converted to country-appropriate units where applicable.
• Race/ethnicity categories use each country’s official census terminology to accurately reflect how populations are measured locally.

Data is sourced from the most recent publicly available statistics as of early 2026. If you notice any inaccuracies or have suggestions for additional data sources, please contact us.