2.1 mm = 0.21 cm. To convert millimeters to centimeters, divide by 10: 2.1 ÷ 10 = 0.21.
How to convert millimeters to centimeters
cm = mm × 0.1
- 1 mm = 0.1 cm (and 1 cm = 10 mm).
- Multiply the amount by the factor: 2.1 × 0.1 = 0.21.
- Answer: 2.1 mm = 0.21 cm.
Shortcut: dividing by 10 gives the same result as multiplying by 0.1.
Millimeters to Centimeters table
| Millimeters (mm) | Centimeters (cm) |
|---|---|
| 1.6 mm | 0.16 cm |
| 1.7 mm | 0.17 cm |
| 1.8 mm | 0.18 cm |
| 1.9 mm | 0.19 cm |
| 2 mm | 0.2 cm |
| 2.1 mm | 0.21 cm |
| 2.2 mm | 0.22 cm |
| 2.3 mm | 0.23 cm |
| 2.4 mm | 0.24 cm |
| 2.5 mm | 0.25 cm |
| 2.6 mm | 0.26 cm |
| mm | cm |
|---|---|
| 1 mm | 0.1 cm |
| 5 mm | 0.5 cm |
| 10 mm | 1 cm |
| 50 mm | 5 cm |
| 100 mm | 10 cm |
| 1,000 mm | 100 cm |
Good to know
1 inch = 2.54 cm exactly; 1 cm = 10 mm; 1 m = 100 cm; 1 foot = 12 inches = 30.48 cm.