Convert square millimeters (mm²) to square inches (in²) with formulas, examples, and conversion tables.
To convert square millimeters to square inches, divide the value by 645.16.
1 square inch = 645.16 square millimeters
| square millimeters | square inches |
|---|---|
| 1 mm² | 0.00155000310001 in² |
| 2 mm² | 0.00310000620001 in² |
| 5 mm² | 0.00775001550003 in² |
| 10 mm² | 0.0155000310001 in² |
| 20 mm² | 0.0310000620001 in² |
| 25 mm² | 0.0387500775002 in² |
| 50 mm² | 0.0775001550003 in² |
| 100 mm² | 0.155000310001 in² |
| 250 mm² | 0.387500775002 in² |
| 500 mm² | 0.775001550003 in² |
| 1000 mm² | 1.55000310001 in² |
| Unit | 1 mm² = |
|---|---|
| Square Millimeters to Square Kilometers | 1e-12 km² |
| Square Millimeters to Hectares | 1e-10 ha |
| Square Millimeters to Square Meters | 1e-6 m² |
| Square Millimeters to Square Centimeters | 0.01 cm² |
| Square Millimeters to Square Miles | 3.86102158593e-13 mi² |
| Square Millimeters to Acres | 2.47105163015e-10 ac |
| Square Millimeters to Square Yards | 1.19599056124e-6 yd² |
| Square Millimeters to Square Feet | 1.07639150512e-5 ft² |
| Square Millimeters to Square Inches | 0.00155000310001 in² |
| Square Millimeters to Ares | 1e-8 a |
| Square Millimeters to Barns | 1e22 b |