Square Nanometers to Square Miles: the quick answer
1 nm² = 3.86102 × 10⁻²⁵ mi²
1 square nanometer equals 3.86102 × 10⁻²⁵ square miles
To convert square nanometers to square miles, multiply the value by 3.86102 × 10⁻²⁵. To go the other way, multiply square miles by 2.58999 × 10²⁴ to get square nanometers.