Life expectancy at birth

alls, period, medium projections

What you should know about this indicator

  • Period life expectancy is a metric that summarizes death rates across all age groups in one particular year.
  • For a given year, it represents the average lifespan for a hypothetical group of people, if they experienced the same age-specific death rates throughout their lives as the age-specific death rates seen in that particular year.

World Population Prospects 2022 is the 27th edition of the official estimates and projections of the global population that have been published by the United Nations since 1951. The estimates are based on all available sources of data on population size and levels of fertility, mortality and international migration for 237 countries or areas. More details at

Life expectancy at birth alls, period, medium projections
The period life expectancy at birth, in a given year.
UN, World Population Prospects (2022) – processed by Our World in Data
Last updated
July 11, 2022
Date range

Sources and processing

This data is based on the following sources

UN, World Population Prospects (2022)

Data published by

UN, World Population Prospects (2022)

Retrieved on
September 9, 2022

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To cite this page overall, including any descriptions, FAQs or explanations of the data authored by Our World in Data, please use the following citation:

“Data Page: Life expectancy at birth”. Our World in Data (2024). Data adapted from UN, World Population Prospects (2022). Retrieved from [online resource]
How to cite this data

In-line citationIf you have limited space (e.g. in data visualizations), you can use this abbreviated in-line citation:

UN, World Population Prospects (2022) – processed by Our World in Data

Full citation

UN, World Population Prospects (2022) – processed by Our World in Data. “Life expectancy at birth – alls, period, medium projections” [dataset]. UN, World Population Prospects (2022) [original data]. Retrieved June 15, 2024 from