The number of years an individual can expect to live. Two methods of calculation are used. Period life expectancy is calculated on the basis of current deaths. In the UK, this amounts to 80 years for males and 84 for females born in 2016. Cohort life expectancy takes into account the expected increase in life expectancy, based on the pattern over preceding years. On this basis, a boy born in the UK in 2016 is likely to live until about 92 years and a girl 94 years.