4.2 mm ≈ 0.0137795 ft. To convert millimeters to feet, multiply by 0.0032808399: 4.2 × 0.0032808399 = 0.0137795.
How to convert millimeters to feet
ft = mm × 0.0032808399
- 1 mm = 0.0032808399 ft (and 1 ft = 304.8 mm).
- Multiply the amount by the factor: 4.2 × 0.0032808399 = 0.0137795.
- Answer: 4.2 mm ≈ 0.0137795 ft (rounded to 6 significant figures).
Millimeters to Feet table
| Millimeters (mm) | Feet (ft) |
|---|---|
| 3.7 mm | 0.0121391 ft |
| 3.8 mm | 0.0124672 ft |
| 3.9 mm | 0.0127953 ft |
| 4 mm | 0.0131234 ft |
| 4.1 mm | 0.0134514 ft |
| 4.2 mm | 0.0137795 ft |
| 4.3 mm | 0.0141076 ft |
| 4.4 mm | 0.0144357 ft |
| 4.5 mm | 0.0147638 ft |
| 4.6 mm | 0.0150919 ft |
| 4.7 mm | 0.0154199 ft |
| mm | ft |
|---|---|
| 1 mm | 0.00328084 ft |
| 5 mm | 0.0164042 ft |
| 10 mm | 0.0328084 ft |
| 50 mm | 0.164042 ft |
| 100 mm | 0.328084 ft |
| 1,000 mm | 3.2808 ft |
Good to know
1 inch = 2.54 cm exactly; 1 cm = 10 mm; 1 m = 100 cm; 1 foot = 12 inches = 30.48 cm.