Millimeter to Centimeter (mm to cm)
Convert mm to cm — Typography converter
One millimeter equals 0.1 cm, so to convert millimeters to centimeters you multiply the value by 0.1. A millimeter is smaller than a centimeter — going the other way, 1 cm = 10 mm. For example, 10 mm = 1 cm and 50 mm = 5 cm.
1 mm = 0.1 cm
Millimeter to Centimeter formula
1 Millimeter = 0.1 cm
Worked examples
- 25 mm = 2.5 cm
- 100 mm = 10 cm
Millimeter to Centimeter conversion table
| Millimeter (mm) | Centimeter (cm) |
|---|---|
| 1 | 0.1 |
| 8 | 0.8 |
| 10 | 1 |
| 11 | 1.1 |
| 12 | 1.2 |
| 14 | 1.4 |
| 16 | 1.6 |
| 18 | 1.8 |
| 20 | 2 |
| 24 | 2.4 |
| 32 | 3.2 |
| 36 | 3.6 |
| 48 | 4.8 |
| 64 | 6.4 |
| 72 | 7.2 |
Why 16 px equals 12 pt
Two fixed definitions drive every conversion on this page. A typographic point is 1/72 of an inch. A CSS reference pixel is 1/96 of an inch. That makes 1 px exactly 0.75 pt, and 16 px exactly 12 pt — which is why 16 px became the default body size on the web: it matches the 12 pt that print had already settled on.
A pica is 12 points, so 1 pica = 16 px. InDesign, Quark and most print workflows measure column widths and gutters in picas; CSS has no pica unit, so those measurements have to be converted before they reach a stylesheet. On this page, 1 mm = 0.1 cm.
The CSS pixel is a reference unit, not a hardware pixel. On a 2× or 3× display, one CSS px still occupies 1/96 inch of visual space — the device simply renders it with more physical pixels. Converting CSS px to physical pixels requires the device pixel ratio, which is a separate calculation from anything on this page.
Metric print specs go through the inch: 1 in = 25.4 mm = 96 px = 72 pt. A 210 mm A4 page width is therefore about 794 px at 96 dpi — useful when matching a web layout to a printed one.
Frequently asked questions
How many centimeters are in one millimeter?
One millimeter equals 0.1 centimeters (cm).
How many millimeters are in one centimeter?
One centimeter equals 10 millimeters (mm).
How do you convert millimeters to centimeters?
1 Millimeter = 0.1 cm. Use the calculator above for any value.
What is 5 mm in cm?
5 mm = 0.5 cm.
What is 100 mm in cm?
100 mm = 10 cm.
What is 12 mm in cm?
12 mm = 1.2 cm.
What is 14 mm in cm?
14 mm = 1.4 cm.
What is 16 mm in cm?
16 mm = 1.6 cm.
What is 18 mm in cm?
18 mm = 1.8 cm.
What is 24 mm in cm?
24 mm = 2.4 cm.
Is a millimeter bigger than a centimeter?
No. A millimeter is smaller — one millimeter equals 0.1 centimeters, while one centimeter equals 10 millimeters.