Square Kilometers to Square Inches: the quick answer
1 km² = 1,550,000,000 in²
1 square kilometer equals 1,550,000,000 square inches
To convert square kilometers to square inches, multiply the value by 1,550,000,000. To go the other way, multiply square inches by 6.4516 × 10⁻¹⁰ to get square kilometers.