How many people have ever been born?

45 billion babies have been born in the 2,027 years this map covers, adding up every year from 0 CE to 2026. The total for all of human history is larger — the Population Reference Bureau puts it near 117 billion going back 190,000 years — and far less certain than either figure looks.

The striking part is the distribution. Of the 45 billion births this map accounts for, 41% happened after 1800 and 22% after 1950 — the last seventy-five years of a two-thousand-year window. About 18% of everyone born since 0 CE is alive right now.

Why our number and the famous one disagree

The most cited answer to this question comes from the Population Reference Bureau: about 117 billion people ever born, counting from 190,000 BCE, of whom roughly 62 billion arrived after 1 CE. Our figure for the same period is 45 billion — about 27% lower.

The gap is not a mistake in either estimate. It is what the uncertainty in this question actually looks like. Reproducing PRB's figure from the population series this map uses would require an average birth rate of about 96 births per 1,000 people per year across the whole two millennia, against the 70 per 1,000 our model produces. Both are defensible readings of pre-modern demography; the higher one assumes shorter lives and higher fertility than we do, and different population reconstructions to apply them to.

Treat any single figure for "people ever born" as an order of magnitude, not a count. It is the product of two things nobody can check: how many people were alive in eras with no censuses, and how often they had children. Our own pre-1800 estimates carry an uncertainty of roughly a third, which alone spans several billion births.

What is actually solid

The recent part. Births since 1950 — about 9.8 billion — rest on censuses, vital registration and UN reconciliation, and are unlikely to be wrong by more than a few percent. It is the 1,950 years before that which carry almost all of the uncertainty while contributing only 78% of the total.

How the pre-modern estimates are made

Related questions

Figures on this page are generated from the same dataset the map draws, and update whenever it does. See the methodology for how each era is estimated and how much it should be trusted.