Convert from t'sun to legua [Spanish, post-1568]

Unit Definition (t'sun)
The t'sun is a Chinese unit of distance equal to 0.1 ch'ih or about 1.41 inches (3.58 centimeters).

Unit Definition (legua [Spanish, post-1568])
Unit of area used in the southwest US, equal to 25 labors, or 4428 acres (Texas), or 4439 acres (California). Also, a unit of length-- approximately three miles.