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📊 Data Sources

Data Sources

What public data sources and assumptions are used for global trait estimates.

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Method FAQ

Is Avortas scientific research?

No. It’s an educational, curiosity-first calculator that uses probability-style thinking.

Why do you use 8.2 billion?

It’s a simple global population frame to make comparisons intuitive.

How can I interpret results responsibly?

Treat them as estimates and entertainment—real-world distributions are complex.

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Where Our Data Comes From

All trait frequency data on Avortas comes from publicly available, peer-reviewed, and institutional sources. We never fabricate numbers or rely on unverified claims. Here are the primary categories and their sources:

Physical traits (eye color, hair color, height): World Atlas demographic surveys, peer-reviewed studies published in journals like Human Genetics and American Journal of Human Genetics, and national health surveys from individual countries.

Blood type: Red Cross blood donation databases, WHO hematology data, and regional blood bank statistics from 50+ countries.

Population & demographics: United Nations World Population Prospects (2024 revision), World Bank indicators, and national census data.

Wealth & income: Credit Suisse Global Wealth Report, World Bank poverty and income data, Gallup World Poll.

Personality types: MBTI Foundation statistics, academic Big Five personality research, Truity and 16Personalities published frequency data.

Birthday frequency: US Social Security Administration birth data, NHS birth records, and published birth seasonality studies.