I assert that Krishna lived for ~116 years.
The uncertainty around this number (116) expressed with the help of ‘~’ is due to the lack of precise information about Krishna’s age at the time of his killing of Kamsa.
Let’s say Krishna’s age at the time of killing of Kamsa = X
Then Krishna’s total lifespan = X + (5622 BCE through 5525 BCE)
I have shown, elsewhere**, that Kamsa was killed sometime after 22 March 5622 BCE.
The Mahabharata War happened in 5561 BCE.
Destruction of Dwarka due to seawater rise occurred in 5525 BCE. In addition to the internal reference of Mahabharata, for the destruction of Dwarka, 36 years after the Mahabharata War, I have shown, elsewhere**, numerous corroborative evidences from around the world, for 5525 BCE as the year for the destruction of Dwarka.
Krishna died around the same time as that of destruction of Dwarka(~5525 BCE).
I have assumed X = 18, based on two (repeat) references from Harivamsha – Vishnuparva, Adhyaya 33:1-2 and Adhyaya 37:1-2 (GP Edition)
** ‘The Year of Mahabharata War: Additional evidence from Astronomy, Geology & Anthropology’ (book in works)