The Life Expectancy Misconception
Seven interactive views into what 'average life expectancy' actually meant across history — and why the headline number is almost always wrong.
ReactRechartsHMDOWIDUN WPP
COUNTRY
The myth vs reality at any year
DRAG TO EXPLORE YEAR1900
EXPECTED AGE AT DEATH — UNITED STATES, 1900
47
if reached
birth
58
if reached
age 5
+11 vs birth
63
if reached
age 15
+16 vs birth
65
if reached
age 25
+18 vs birth
70
if reached
age 45
+23 vs birth
77
if reached
age 65
+30 vs birth
The headline number was 47. Reaching age 25 raised your expected lifespan to 65 — a 18-year gap almost entirely from mass infant and child death, not short adult lives.
EXPECTED AGE AT DEATH BY SURVIVAL THRESHOLD — 1900
SOURCES: Human Mortality Database (HMD, 2025) pre-1950 period tables · UN World Population Prospects (2024) post-1950 · SSA Actuarial Life Tables — US sex-disaggregated · Our World in Data processed datasets · Values = expected AGE AT DEATH given mortality rates of each year (period life expectancy). Approximate. For research illustration.