Square Meters to Square Mils: the quick answer
1 m² = 1,550,000,000 mil²
1 square meter equals 1,550,000,000 square mils
To convert square meters to square mils, multiply the value by 1,550,000,000. To go the other way, multiply square mils by 6.4516 × 10⁻¹⁰ to get square meters.