Square Nanometers to Square Meters: the quick answer
1 nm² = 1 × 10⁻¹⁸ m²
1 square nanometer equals 1 × 10⁻¹⁸ square meters
To convert square nanometers to square meters, multiply the value by 1 × 10⁻¹⁸. To go the other way, multiply square meters by 1 × 10¹⁸ to get square nanometers.