Cowell, 55, said the test did not take into account any unfortunate accidents but said he will live till the year 2055, reported Daily Mirror.
"I had the DNA test done in LA which predicts when you're going to die. They take your blood and DNA, then give you back a sheet of paper which says 'We think you're going to be alive until xxxx'.
"Obviously it doesn't take account of the fact you might get hit by a bus tomorrow, but I got told I'd die aged 95 - which is about as good as you can expect," he said.
"I think a lot of it is down to having a family now, and a lack of stress. I've learned to deal with stress much better now, things don't bother me in the way that they once used to.