4.2 cm = 0.000042 km. To convert centimeters to kilometers, divide by 100,000: 4.2 ÷ 100,000 = 0.000042.
How to convert centimeters to kilometers
km = cm × 0.00001
- 1 cm = 0.00001 km (and 1 km = 100,000 cm).
- Multiply the amount by the factor: 4.2 × 0.00001 = 0.000042.
- Answer: 4.2 cm = 0.000042 km.
Shortcut: dividing by 100,000 gives the same result as multiplying by 0.00001.
Centimeters to Kilometers table
| Centimeters (cm) | Kilometers (km) |
|---|---|
| 3.7 cm | 0.000037 km |
| 3.8 cm | 0.000038 km |
| 3.9 cm | 0.000039 km |
| 4 cm | 0.00004 km |
| 4.1 cm | 0.000041 km |
| 4.2 cm | 0.000042 km |
| 4.3 cm | 0.000043 km |
| 4.4 cm | 0.000044 km |
| 4.5 cm | 0.000045 km |
| 4.6 cm | 0.000046 km |
| 4.7 cm | 0.000047 km |
| cm | km |
|---|---|
| 1 cm | 0.00001 km |
| 5 cm | 0.00005 km |
| 10 cm | 0.0001 km |
| 50 cm | 0.0005 km |
| 100 cm | 0.001 km |
| 1,000 cm | 0.01 km |
Good to know
1 inch = 2.54 cm exactly; 1 cm = 10 mm; 1 m = 100 cm; 1 foot = 12 inches = 30.48 cm.