Modern World K8 is a contemporary admixture calculator that estimates the proportion of your genome attributable to eight broad, modern reference clusters: European, Southeast–East Asian, Central–South Asian, Northeast African, Amerindian–Siberian, West Asian, West African, and East Asian. Designed for a global audience, it gives clear, accessible results for direct-to-consumer DNA users, genealogists, educators, students, and researchers seeking a continental-to-subcontinental overview of ancestry in a modern context. This calculator analyzes genome-wide allele frequency patterns and assigns relative percentages of similarity to each reference cluster (K=8). The output reveals which large-scale population pools your DNA most closely resembles, highlights mixed ancestry and regional contributions, and identifies broad migration and admixture signals common in recent millennia. Because it uses contemporary reference panels, Modern World K8 is best for understanding recent and historically documented population mixtures rather than deep Paleolithic lineages. Interpreting results: percentages represent genetic affinity to the defined clusters, not precise population labels. For example, a higher score in West Asian or Central–South Asian suggests shared ancestry or gene flow from those regions; an Amerindian–Siberian signal points to Native American or northern Eurasian connections. This calculator is particularly valuable as a first-pass, educational tool that contextualizes personal results and guides further investigation with higher-resolution or region-specific analyses. Limitations and value: Modern World K8 balances clarity and breadth—providing intuitive, reproducible summaries while acknowledging resolution limits. It is a practical starting point for anyone exploring global ancestry patterns, comparing results across different calculators, or teaching how modern population structure maps onto contemporary genetic diversity.