Answer

In Jain Dharma, a yojan is a traditional unit of distance used in Jain cosmology and scriptures.

A commonly used traditional calculation is:

• 1 yojan = 4 gau
• 1 gau = 2 kos
• So, 1 yojan = 8 kos

In modern approximate terms, many Jain explanations take:

• 1 yojan ≈ 8 to 9 miles
• 1 yojan ≈ 13 to 14.5 kilometers

Explanation

The exact modern conversion can vary because ancient distance units were not standardized like today’s kilometers or miles. In Jain scriptures, yojan is especially used to describe vast measurements of:

• Jambudweep
• Mount Meru
• Lokakash
• Narak, Madhyalok, and Devlok dimensions

Takeaway

For general understanding, you may remember:

1 yojan ≈ 13 kilometers

But in Jain cosmology, yojan is mainly important as a scriptural measurement rather than an exact modern scientific unit.