Measurement calculator that can be used to convert Square mile to Acre (US), among others: 1 Square mile [mi²] = 639.997 378 305 67 Acre (US) [ac]
Convert Square mile to Acre (US):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 mile [mi²]'. Finally choose the unit you want the value to be converted to, in this case 'Acre (US) [ac]'.