820 mm = 82 cm. To convert millimeters to centimeters, divide by 10: 820 ÷ 10 = 82.
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: 820 × 0.1 = 82.
- Answer: 820 mm = 82 cm.
Shortcut: dividing by 10 gives the same result as multiplying by 0.1.
Millimeters to Centimeters table
| Millimeters (mm) | Centimeters (cm) |
|---|---|
| 815 mm | 81.5 cm |
| 816 mm | 81.6 cm |
| 817 mm | 81.7 cm |
| 818 mm | 81.8 cm |
| 819 mm | 81.9 cm |
| 820 mm | 82 cm |
| 821 mm | 82.1 cm |
| 822 mm | 82.2 cm |
| 823 mm | 82.3 cm |
| 824 mm | 82.4 cm |
| 825 mm | 82.5 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.