Every country conducts a census every 5 to 10 years. Between censuses, statisticians estimate population using birth records, death records, and migration data. International bodies like the UN Population Division reconcile these national estimates into a consistent global figure. Our counter interpolates between those figures so the number moves continuously rather than jumping when a new report lands.

Globally, about 4.3 babies are born and 1.7 people die every second — a net gain of roughly 2.6 people per second, or about 80 million per year. The "Births Today" and "Deaths Today" counters use these annualized rates prorated to the time elapsed since midnight in your time zone. Population change also includes migration, which our country growth rates fold in.

The time slider lets you scrub from 1950 to 2100. Figures before the present are historical estimates from the UN; figures after the present are projections that assume current trends in fertility and mortality continue. Projections are not predictions — they describe what would happen if assumptions hold. The further out you look, the more uncertain they become.

Censuses undercount young children, migrants, and marginalized groups. In many countries, births and deaths are not fully registered. Migration is especially hard to measure and can change suddenly. Our live counter is a statistical interpolation, not a measurement — treat it as an approximation that becomes more accurate as new official data arrives.