Convert from square inch to square centimeter

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 centimeter)
The square centimeter is the CGS unit of area. 1 cm² equals 100 mm², 10^-4 m², or approximately 0.155 000 3 in².