Square Miles to Square Rods (Perches): the quick answer
1 mi² = 102,400 rd²
1 square mile equals 102,400 square rods (perches)
To convert square miles to square rods (perches), multiply the value by 102,400. To go the other way, multiply square rods (perches) by 9.76563 × 10⁻⁶ to get square miles.