The average life expectancy around the year 1700 was only about 30–40 years at birth , depending heavily on region, with places like England often estimated in the mid‑30s.

Quick Scoop: Life Expectancy in 1700

A surprisingly low number

When people ask “what was the average life expectancy in 1700” , historians usually mean life expectancy at birth – the statistical average of how long a newborn was expected to live.

  • In England and parts of Western Europe between 1600 and 1800, life expectancy at birth generally hovered around 35–40 years.
  • Some broader summaries of the “1700–1900” era give a rough global range of about 40–50 years , but those are very coarse and mix later improvements into the same block of time.
  • Local conditions mattered a lot: crowded, poor urban parishes could have life expectancies closer to 20–30 years , while healthier rural or elite groups could be noticeably higher.

A big part of why that headline number looks so low is infant and child mortality. Many children died before age 5, which drags the average down sharply.

If you made it to adulthood…

Here’s the twist: if you’re imagining that “everyone dropped dead at 35,” that’s not how it worked.

  • Once someone survived childhood, their odds improved dramatically.
  • Studies of early modern Britain show that a 30‑year‑old might expect roughly another 28–30 years of life, putting a typical death age around the late 50s or early 60s.
  • Research from Cambridge’s historical demography group notes that although life expectancy at birth was only about 35–40 years, the most common age for adult deaths was around 70 – the classic “three score and ten.”

So in a typical 1700s village, you would see grandparents and elderly neighbors; the problem was how many people never made it out of childhood.

Why it was so low

A few of the main forces pulling life expectancy down in 1700:

  • Infectious disease : Smallpox, tuberculosis, and other infections were constant threats, especially to children.
  • High infant mortality : In some places more than 10–20% of babies died before age one, and many more before age five.
  • Poor sanitation and water : Contaminated water and limited understanding of hygiene meant frequent deadly outbreaks.
  • Limited medical knowledge : No antibiotics, no vaccines for the major diseases of the time, and many treatments were ineffective or harmful.

Compared to modern high‑income countries, where life expectancy is often 75–80 years or more, that 1700 figure highlights how much progress since the 19th and 20th centuries has come from cleaner water, vaccines, and basic public health.

One last nuance

Historians also warn that there isn’t a single exact “1700 number” that fits all regions.

  • England and parts of Western Europe around 1700 are relatively well documented and often fall near 35–40 years at birth.
  • For places like colonial America, specialists note that estimates are much fuzzier, and any single “mean life expectancy in the 1700s” should be treated as an approximation, not a hard fact.

So the best short answer for “what was the average life expectancy in 1700” is:

Roughly 35–40 years at birth in well‑studied European regions , heavily depressed by high infant and child mortality, with many adults who survived childhood living into their 60s or 70s.

TL;DR: Average life expectancy in 1700 was about 35–40 years at birth in places like England, mostly because so many children died young; adults who got past childhood often lived into later middle age or old age.

Information gathered from public forums or data available on the internet and portrayed here.