Fen (Area, China) to Square Miles: the quick answer
1 fen = 2.57401 × 10⁻⁵ mi²
1 fen (area, China) equals 2.57401 × 10⁻⁵ square miles
To convert fen (area, China) to square miles, multiply the value by 2.57401 × 10⁻⁵. To go the other way, multiply square miles by 38,849.8 to get fen (area, China).