4.2 mm2 = 0.042 cm2. To convert square millimeters to square centimeters, divide by 100: 4.2 ÷ 100 = 0.042.
How to convert square millimeters to square centimeters
cm2 = mm2 × 0.01
- 1 mm2 = 0.01 cm2 (and 1 cm2 = 100 mm2).
- Multiply the amount by the factor: 4.2 × 0.01 = 0.042.
- Answer: 4.2 mm2 = 0.042 cm2.
Shortcut: dividing by 100 gives the same result as multiplying by 0.01.
Square Millimeters to Square Centimeters table
| Square Millimeters (mm2) | Square Centimeters (cm2) |
|---|---|
| 3.7 mm2 | 0.037 cm2 |
| 3.8 mm2 | 0.038 cm2 |
| 3.9 mm2 | 0.039 cm2 |
| 4 mm2 | 0.04 cm2 |
| 4.1 mm2 | 0.041 cm2 |
| 4.2 mm2 | 0.042 cm2 |
| 4.3 mm2 | 0.043 cm2 |
| 4.4 mm2 | 0.044 cm2 |
| 4.5 mm2 | 0.045 cm2 |
| 4.6 mm2 | 0.046 cm2 |
| 4.7 mm2 | 0.047 cm2 |
| mm2 | cm2 |
|---|---|
| 1 mm2 | 0.01 cm2 |
| 5 mm2 | 0.05 cm2 |
| 10 mm2 | 0.1 cm2 |
| 50 mm2 | 0.5 cm2 |
| 100 mm2 | 1 cm2 |
| 1,000 mm2 | 10 cm2 |