Square millimeters = length mm × width mm. Example: 10 mm × 10 mm = 100 mm².
mm
mm
Area
| Length | Width | Area |
|---|---|---|
| 10 mm | 10 mm | 100 mm² |
| 25 mm | 40 mm | 1000 mm² |
| 1 mm | 1 mm | 1 mm² |
Formula
mm² is area. A single millimeter value needs another side length before it becomes square millimeters.