In Jain Dharma, the age of a Tirthankar is not one fixed number. It varies according to the era and the specific Tirthankar.

For the 24th Tirthankar, Bhagwan Mahavir, the age was 72 years.

In general:

• Some Tirthankars lived for very long lifespans in earlier ages.
• In the current time cycle, lifespans became shorter as the era progressed.

If you mean the age of a particular Tirthankar, I can tell that specifically.