The average lifespan or life of a Cockapoo dog is around 14 to 18 years.
Since the Cockapoo is a small dog it tends to live longer than larger dogs and as long as you take good care of the Cockapoo and get it regular vet checkups to catch anything that the dog might have then you can except between 14 to 18 years of life of the Cockapoo.
Feed the Cockapoo a healthy diet, get it plenty of exercise etc and it will live a good long time and sometimes they may live a little longer than their life expectancy as I've known a Cockapoo to live for 21 years but it's rare.
Still if the Cockapoo lived for 18 years it lived an average lifespan.