Square Mils to Hectares: the quick answer
1 mil² = 6.4516 × 10⁻¹⁴ ha
1 square mil equals 6.4516 × 10⁻¹⁴ hectares
To convert square mils to hectares, multiply the value by 6.4516 × 10⁻¹⁴. To go the other way, multiply hectares by 15,500,000,000,000 to get square mils.