18 cm = 180 mm. To convert centimeters to millimeters, multiply by 10: 18 × 10 = 180.
How to convert centimeters to millimeters
mm = cm × 10
- 1 cm = 10 mm (and 1 mm = 0.1 cm).
- Multiply the amount by the factor: 18 × 10 = 180.
- Answer: 18 cm = 180 mm.
Centimeters to Millimeters table
| Centimeters (cm) | Millimeters (mm) |
|---|---|
| 13 cm | 130 mm |
| 14 cm | 140 mm |
| 15 cm | 150 mm |
| 16 cm | 160 mm |
| 17 cm | 170 mm |
| 18 cm | 180 mm |
| 19 cm | 190 mm |
| 20 cm | 200 mm |
| 21 cm | 210 mm |
| 22 cm | 220 mm |
| 23 cm | 230 mm |
| cm | mm |
|---|---|
| 1 cm | 10 mm |
| 5 cm | 50 mm |
| 10 cm | 100 mm |
| 50 cm | 500 mm |
| 100 cm | 1,000 mm |
| 1,000 cm | 10,000 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.