Convert Square Millimeter (mm²) to Square Inch (in²) instantly. Enter any value and get the result immediately.
mm² → in² Converter
| Square Millimeter (mm²) | Square Inch (in²) |
|---|---|
| 0.1 mm² | 0.000155 in² |
| 0.5 mm² | 0.000775 in² |
| 1 mm² | 0.00155 in² |
| 2 mm² | 0.00310001 in² |
| 5 mm² | 0.00775002 in² |
| 10 mm² | 0.01550003 in² |
| 20 mm² | 0.03100006 in² |
| 50 mm² | 0.07750016 in² |
| 100 mm² | 0.15500031 in² |
| 200 mm² | 0.31000062 in² |
| 500 mm² | 0.77500155 in² |
| 1000 mm² | 1.5500031 in² |
| 5000 mm² | 7.7500155 in² |
| 10000 mm² | 15.500031 in² |
Formula: Square Inch = Square Millimeter × 0.00155
Example: 1 mm² = 0.00155 in²
You can also use the interactive converter above. Simply enter any Square Millimeter value and the equivalent Square Inch value will appear instantly. Click the ⇄ button to reverse the conversion.
A little context on Square Millimeter and Square Inch helps this conversion stick, along with some frequently asked questions below.
A Square Millimeter (mm2) is a very small metric area unit equal to a 1 mm by 1 mm square.
A Square Inch (sq in) is a small imperial area unit equal to a 1 in by 1 in square.
The formula is: Square Inch = Square Millimeter x 0.00155. Multiply any Square Millimeter value by 0.00155 to get the equivalent in Square Inch.
1 mm2 = 0.00155 sq in.
1 sq in = 645.161290322581 mm2.
Square Millimeter is smaller than Square Inch. 1 Square Inch = 645.161290322581 mm2.