How the count works

Memento displays a real-time estimate of the total number of humans who have ever been born and the total who have ever died. These are cumulative historical totals, not current population figures. The counter does not reset, does not measure only the living, and does not restart on page refresh.

The baseline

All values are anchored to a single calibrated baseline: April 19, 2026 at 00:00 UTC. At that moment:

• Total humans ever born: approximately 117.03 billion
• Currently living: approximately 8.12 billion
• Total humans ever deceased: approximately 108.91 billion

The rates

From the baseline forward, the counter adds elapsed time multiplied by global average rates:

• Births: approximately 4.3 per second
• Deaths: approximately 2.0 per second

How the counter computes its values

Every frame, the counter reads the current time, computes seconds elapsed since the baseline, and adds the expected births and deaths. This means the value is deterministic: two people opening the page at the same moment on opposite sides of the world see the same numbers, and refreshing the page does not reset or falsify the count.

Sources

• Population Reference Bureau (2024). How Many People Have Ever Lived on Earth? The foundational estimate of cumulative human births, beginning from approximately 50,000 BCE.
• United Nations, Department of Economic and Social Affairs, Population Division (2024). World Population Prospects 2024. Source for the current-population and per-second rate figures.
• CIA World Factbook. Cross-reference for global birth and death rate figures.

Uncertainty

All cumulative-historical figures are estimates. Demographic models for prehistoric and ancient populations carry meaningful uncertainty; different models produce totals ranging from roughly 100 billion to 125 billion. Memento uses the Population Reference Bureau's 2024 midpoint as its anchor. The tool is designed for illustration and reflection, not for statistical research.

Return to the live counter.