| 1 sq in = | 645.16 mm² |
| 1 sq in = | 6.452 cm² |
| 1 sq in = | 0.0645 dm² |
| 1 sq in = | 0.00694 sq ft |
| 1 sq in = | 0.000772 sq yd |
| 1 sq in = | 0.000645 m² |
| 1 sq in = | 0.00000645 a |
| 1 sq in = | 0.000000159 acre |
| 1 sq in = | 0.0000000645 ha |
| 1 sq in = | 0.000000000645 km² |
| 1 sq in = | 0.000000000249 sq mi |