Square millimeter -> Square kilometer
Measurement calculator that can be used to convert Square millimeter to Square kilometer, among others: 1 Square millimeter [mm²] = 0.000 000 000 001 Square kilometer [km²]
Convert Square millimeter to Square kilometer:Choose the right category from the selection list, in this case 'Area'. Next enter the value you want to convert. From the selection list, choose the unit that corresponds to the value you want to convert, in this case 'Square millimeter [mm²]'. Finally choose the unit you want the value to be converted to, in this case 'Square kilometer [km²]'.