4.2 in = 106.68 mm. To convert inches to millimeters, multiply by 25.4: 4.2 × 25.4 = 106.68.
How to convert inches to millimeters
mm = in × 25.4
- 1 in = 25.4 mm (and 1 mm = 0.039370079 in).
- Multiply the amount by the factor: 4.2 × 25.4 = 106.68.
- Answer: 4.2 in = 106.68 mm.
Inches to Millimeters table
| Inches (in) | Millimeters (mm) |
|---|---|
| 3.7 in | 93.98 mm |
| 3.8 in | 96.52 mm |
| 3.9 in | 99.06 mm |
| 4 in | 101.6 mm |
| 4.1 in | 104.14 mm |
| 4.2 in | 106.68 mm |
| 4.3 in | 109.22 mm |
| 4.4 in | 111.76 mm |
| 4.5 in | 114.3 mm |
| 4.6 in | 116.84 mm |
| 4.7 in | 119.38 mm |
| in | mm |
|---|---|
| 1 in | 25.4 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 50 in | 1,270 mm |
| 100 in | 2,540 mm |
| 1,000 in | 25,400 mm |
Good to know
1 inch = 2.54 cm exactly; 1 cm = 10 mm; 1 m = 100 cm; 1 foot = 12 inches = 30.48 cm.