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How to Convert Millimeters to Centimeters
Divide the millimeter value by 10 (or multiply by 0.1). There are exactly 10 millimeters in one centimeter.
Millimeters to Centimeters Conversion Table
| Millimeters | Centimeters |
|---|---|
| 0.5 | 0.05 |
| 1 | 0.1 |
| 2 | 0.2 |
| 5 | 0.5 |
| 10 | 1 |
| 15 | 1.5 |
| 20 | 2 |
| 25 | 2.5 |
| 50 | 5 |
| 100 | 10 |
| 250 | 25 |
| 500 | 50 |
| 1000 | 100 |
How Many Centimeters in a Millimeter?
1 millimeter equals 0.1 centimeters. To convert any value, multiply the number of millimeters by 0.1.
Common Use Cases
Radiologists reading imaging studies such as CT scans and MRIs measure lesions and anatomical structures in millimeters, but clinical reports and patient-facing summaries often express sizes in centimeters. A 22 mm kidney stone is reported as 2.2 cm, which is easier for patients and referring physicians to contextualize against everyday objects.
Watchmakers and horologists specify case diameters, lug widths, and crystal sizes in millimeters for precision fitting, but marketing materials and product listings sometimes use centimeters. A 42 mm watch case is 4.2 cm, and converting correctly matters when ordering replacement parts like gaskets, crystals, and straps from catalogs that mix units.
Graphic designers preparing print layouts convert between millimeters and centimeters when switching between software that defaults to different units. Bleed margins of 3 mm (0.3 cm) and spine widths measured in millimeters must be entered correctly in centimeter-based page-setup dialogs to avoid misaligned trimming at the print shop.