In Jain cosmology, there is no fixed direct conversion like “1 year on Earth = X time in hell.”

The reason is:

• Hell beings (narakī jīvas) have a much slower and different experience of time.
• Their lifespan is measured in sāgaropama units, which are extremely vast.
• Even the shortest lifespan in hell is enormously longer than human years.

So in simple words:

1 year on Earth is not equal to any standard time in hell. Hell time is described in Jain texts as vastly longer and very intense, but not converted into a simple human ratio.

If you want, I can also explain:

• how long beings live in each hell level, or
• the 7 or 8 narakas in Jainism in simple language.