Convert from square inch to square kilometer

Unit Definition (square inch)
The square inch is a traditional unit of area. 1 in² equals exactly 6.4516 cm² or 645.16 mm².

Unit Definition (square kilometer)
The square kilometer is a common metric unit of area. One square kilometer equals 100 hectares, 10E6 square meters, approximately 247.105 acres, or approximately 0.386 102 square mile.