Every number on this dashboard is an estimate. We do not count individuals; we rely on statistical agencies and international organizations that do, and we interpolate between their reports.

Our base population figures come from the World Bank Open Data API, which itself draws on the UN World Population Prospects and national censuses. Country growth rates are derived from year-over-year changes in these sources. Demographic breakdowns by age and sex come from the UN World Population Prospects.

The "live" counter is a real-time interpolation. We take a base population and add births, subtract deaths, and apply the growth rate second by second. The births-today and deaths-today figures use annualized rates prorated to the time elapsed since midnight.

These are estimates, not measurements. Censuses happen every 5–10 years and are themselves imperfect — undercounting is common, especially for young children, migrants, and marginalized groups. In many countries, births and deaths are not fully registered.

For a full description of our methods and sources, see our Methodology and Sources pages. We distinguish estimated data (based on rates applied to a base population), calculated data (derived from other figures, like density = population ÷ area), and projected data (forward extrapolations that assume current trends continue).