In Jainism, as in many ancient Indian traditions, the "yojan" is a traditional unit of distance. According to Jain texts, the length of a yojan can vary, but it is commonly accepted as approximately 13 to 16 kilometers. Some Jain scriptures, such as those referenced in the Jainendra Siddhanta Kosa and other commentaries, consider 1 yojan to be about 13.2 kilometers (8.2 miles). However, interpretations may vary slightly depending on the specific text or tradition.

In summary: 1 yojan ≈ 13 to 16 kilometers (most commonly accepted as around 13.2 km in Jain tradition).