Note, this will only give the estimated genetic potential of your lifespan, it will NOT tell you when you die but it's still pretty cool.

A controversial test capable of revealing just how long you have to live is set to hit the market in Britain within the year. The test measures a person's telomeres which are the structures found on the tips of chromosomes and researchers believe that these telomeres are crucial indicators of the speed in which a body is ageing.
The test was developed by Maria Blasco from the Spanish National Cancer Research Centre. Blasco’s company, Life Length, is in negotiations with medical diagnostic businesses throughout Europe in order to collect blood samples and market the tests.

The test works by measuring the length of the telomeres and is able to then determine the biological age of a person. Research shows that individuals with shorter than normal telomeres have a shorter life span than those individuals with longer telomeres. The test, however, is not capable of giving an exact length of life in terms of months or years.

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