Throughout most of history, average life expectancy from birth was fairly consistent across the globe, at around 24 years. A major contributor to this was high rates of infant and child mortality; those who survived into adulthood could expect to live to their 50s or 60s, yet pandemics, food instability, and conflict did cause regular spikes in mortality across the entire population. Gradually, from the 16th to 19th centuries, there was some growth in more developed societies, due to improvements in agriculture, infrastructure, and medical knowledge. However, the most significant change came with the introduction of vaccination and other medical advances in the 1800s, which saw a sharp decline in child mortality and the onset of the demographic transition. This phenomenon began in more developed countries in the 1800s, before spreading to Latin America, Asia, and (later) Africa in the 1900s. As the majority of the world's population lives in countries considered to be "less developed", this figure is much closer to the global average. However, today, there is a considerable difference in life expectancies across these countries, ranging from 84.7 years in Japan to 53 years in the Central African Republic.

A global phenomenon, known as the demographic transition, has seen life expectancy from birth increase rapidly over the past two centuries. In pre-industrial societies, the average life expectancy was around 24 years, and it is believed that this was the case throughout most of history, and in all regions. The demographic transition then began in the industrial societies of Europe, North America, and the West Pacific around the turn of the 19th century, and life expectancy rose accordingly. Latin America was the next region to follow, before Africa and most Asian populations saw their life expectancy rise throughout the 20th century.

Global life expactancy at birth has risen significantly since the mid-1900s, from roughly 46 years in 1950 to 73.5 years in 2025. Post-COVID-19 projections There was a drop of 1.7 years during the COVID-19 pandemic, between 2019 and 2021, however figures resumed upon their previous trajectory the following year due to the implementation of vaccination campaigns and the lower severity of later strains of the virus. By the end of the century it is believed that global life expectancy from birth will reach 82 years, although growth will slow in the coming decades as many of the more-populous Asian countries reach demographic maturity. However, there is still expected to be a wide gap between various regions at the end of the 2100s, with the Europe and North America expected to have life expectancies around 90 years, whereas Sub-Saharan Africa is predicted to be in the low-70s. The Great Leap Forward While a decrease of one year during the COVID-19 pandemic may appear insignificant, this is the largest decline in life expectancy since the "Great Leap Forward" in China in 1958, which caused global life expectancy to fall by almost four years between by 1960. The "Great Leap Forward" was a series of modernizing reforms, which sought to rapidly transition China's agrarian economy into an industrial economy, but mismanagement led to tens of millions of deaths through famine and disease.

Chart and table of Germany life expectancy from 1950 to 2025. United Nations projections are also included through the year 2100.

Life expectancy at birth, total (years) in United States was reported at 77.43 years in 2022, according to the World Bank collection of development indicators, compiled from officially recognized sources. United States - Life expectancy at birth, total (years) - actual values, historical data, forecasts and projections were sourced from the World Bank on March of 2025.

For most of the world, throughout most of human history, the average life expectancy from birth was around 24. This figure fluctuated greatly depending on the time or region, and was higher than 24 in most individual years, but factors such as pandemics, famines, and conflicts caused regular spikes in mortality and reduced life expectancy. Child mortality The most significant difference between historical mortality rates and modern figures is that child and infant mortality was so high in pre-industrial times; before the introduction of vaccination, water treatment, and other medical knowledge or technologies, women would have around seven children throughout their lifetime, but around half of these would not make it to adulthood. Accurate, historical figures for infant mortality are difficult to ascertain, as it was so prevalent, it took place in the home, and was rarely recorded in censuses; however, figures from this source suggest that the rate was around 300 deaths per 1,000 live births in some years, meaning that almost one in three infants did not make it to their first birthday in certain periods. For those who survived to adolescence, they could expect to live into their forties or fifties on average. Modern figures It was not until the eradication of plague and improvements in housing and infrastructure in recent centuries where life expectancy began to rise in some parts of Europe, before industrialization and medical advances led to the onset of the demographic transition across the world. Today, global life expectancy from birth is roughly three times higher than in pre-industrial times, at almost 73 years. It is higher still in more demographically and economically developed countries; life expectancy is over 82 years in the three European countries shown, and over 84 in Japan. For the least developed countries, mostly found in Sub-Saharan Africa, life expectancy from birth can be as low as 53 years.

Chart and table of India life expectancy from 1950 to 2025. United Nations projections are also included through the year 2100.

United States - Life Expectancy at Birth, Total for High Income Countries was 80.88737 Number of Years in January of 2019, according to the United States Federal Reserve. Historically, United States - Life Expectancy at Birth, Total for High Income Countries reached a record high of 80.88737 in January of 2019 and a record low of 68.55283 in January of 1960. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Life Expectancy at Birth, Total for High Income Countries - last updated from the United States Federal Reserve on March of 2025.

Chart and table of Hong Kong life expectancy from 1950 to 2025. United Nations projections are also included through the year 2100.

In 2023, the average life expectancy of the world was 70 years for men and 75 years for women. The lowest life expectancies were found in Africa, while Oceania and Europe had the highest.

What is life expectancy?

Life expectancy is defined as a statistical measure of how long a person may live, based on demographic factors such as gender, current age, and most importantly the year of their birth. The most commonly used measure of life expectancy is life expectancy at birth or at age zero. The calculation is based on the assumption that mortality rates at each age were to remain constant in the future.

Life expectancy has changed drastically over time, especially during the past 200 years. In the early 20th century, the average life expectancy at birth in the developed world stood at 31 years. It has grown to an average of 70 and 75 years for males and females respectively, and is expected to keep on growing with advances in medical treatment and living standard continuing.

Highest and lowest life expectancy worldwide

Life expectancy still varies greatly between different regions and countries of the world. The biggest impact on life expectancy is the quality of public health, medical care, and diet. As of 2021, the countries with the highest life expectancy were Japan, Liechtenstein, Switzerland, and South Korea, all at 84 years. Most of the countries with the lowest life expectancy are mostly African countries. The ranking was led by the Chad, Nigeria, and Lesotho with 53 years.

United States - Life Expectancy at Birth, Total for Countries with Fragile and Conflict Affected Situations was 62.48009 Number of Years in January of 2019, according to the United States Federal Reserve. Historically, United States - Life Expectancy at Birth, Total for Countries with Fragile and Conflict Affected Situations reached a record high of 62.48009 in January of 2019 and a record low of 35.04165 in January of 1950. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Life Expectancy at Birth, Total for Countries with Fragile and Conflict Affected Situations - last updated from the United States Federal Reserve on March of 2025.

Chart and table of Sweden life expectancy from 1950 to 2025. United Nations projections are also included through the year 2100.

United States - Life Expectancy at Birth, Total for the Arab World was 71.98971 Number of Years in January of 2019, according to the United States Federal Reserve. Historically, United States - Life Expectancy at Birth, Total for the Arab World reached a record high of 71.98971 in January of 2019 and a record low of 40.34559 in January of 1950. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Life Expectancy at Birth, Total for the Arab World - last updated from the United States Federal Reserve on March of 2025.

Chart and table of Pakistan life expectancy from 1950 to 2025. United Nations projections are also included through the year 2100.

As of 2023, the countries with the highest life expectancy included Switzerland, Japan, and Spain. As of that time, a new-born child in Switzerland could expect to live an average of 84.2 years. Around the world, females consistently have a higher average life expectancy than males, with females in Europe expected to live an average of six years longer than males on this continent. Increases in life expectancy The overall average life expectancy in OECD countries increased by 11.3 years from 1970 to 2019. The countries that saw the largest increases included Turkey, India, and South Korea. The life expectancy at birth in Turkey increased an astonishing 24.4 years over this period. The countries with the lowest life expectancy worldwide as of 2022 were Chad, Lesotho, and Nigeria, where a newborn could be expected to live an average of 53 years. Life expectancy in the U.S. The life expectancy in the United States was 77.43 years as of 2022. Shockingly, the life expectancy in the United States has decreased in recent years, while it continues to increase in other similarly developed countries. The COVID-19 pandemic and increasing rates of suicide and drug overdose deaths from the opioid epidemic have been cited as reasons for this decrease.

Life expectancy at birth, male (years) in South Korea was reported at 79.9 years in 2022, according to the World Bank collection of development indicators, compiled from officially recognized sources. South Korea - Life expectancy at birth, male (years) - actual values, historical data, forecasts and projections were sourced from the World Bank on March of 2025.

United States - Life Expectancy at Birth, Total for Middle Income Countries was 72.05927 Number of Years in January of 2019, according to the United States Federal Reserve. Historically, United States - Life Expectancy at Birth, Total for Middle Income Countries reached a record high of 72.05927 in January of 2019 and a record low of 43.10400 in January of 1950. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Life Expectancy at Birth, Total for Middle Income Countries - last updated from the United States Federal Reserve on March of 2025.

The average for 2022 based on 12 countries was 72.9 years. The highest value was in Chile: 79.52 years and the lowest value was in Bolivia: 64.93 years. The indicator is available from 1960 to 2022. Below is a chart for all countries where data are available.

Chart and table of Ireland life expectancy from 1950 to 2025. United Nations projections are also included through the year 2100.

Life Expectancy at Birth, Total for Developing Countries in East Asia and Pacific was 75.40970 Number of Years in January of 2019, according to the United States Federal Reserve. Historically, Life Expectancy at Birth, Total for Developing Countries in East Asia and Pacific reached a record high of 75.40970 in January of 2019 and a record low of 43.30605 in January of 1950. Trading Economics provides the current actual value, an historical data chart and related indicators for Life Expectancy at Birth, Total for Developing Countries in East Asia and Pacific - last updated from the United States Federal Reserve on March of 2025.