30 cm = 300 mm. To convert centimeters to millimeters, multiply by 10: 30 × 10 = 300.
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: 30 × 10 = 300.
- Answer: 30 cm = 300 mm.
Centimeters to Millimeters table
| Centimeters (cm) | Millimeters (mm) |
|---|---|
| 25 cm | 250 mm |
| 26 cm | 260 mm |
| 27 cm | 270 mm |
| 28 cm | 280 mm |
| 29 cm | 290 mm |
| 30 cm | 300 mm |
| 31 cm | 310 mm |
| 32 cm | 320 mm |
| 33 cm | 330 mm |
| 34 cm | 340 mm |
| 35 cm | 350 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.