Convert Centimeter (cm) to Millimeter (mm) instantly. Enter any value and get the result immediately.
cm → mm Converter
| Centimeter (cm) | Millimeter (mm) |
|---|---|
| 0.1 cm | 1 mm |
| 0.5 cm | 5 mm |
| 1 cm | 10 mm |
| 2 cm | 20 mm |
| 5 cm | 50 mm |
| 10 cm | 100 mm |
| 20 cm | 200 mm |
| 50 cm | 500 mm |
| 100 cm | 1000 mm |
| 200 cm | 2000 mm |
| 500 cm | 5000 mm |
| 1000 cm | 10,000 mm |
| 5000 cm | 50,000 mm |
| 10000 cm | 100,000 mm |
Converting centimeters to millimeters is one of the simplest metric conversions — both units are part of the same system and are used daily in engineering, construction, medicine, and manufacturing. Since 1 centimeter = 10 millimeters, you just multiply by 10. No complex formulas needed.
A centimeter is one-hundredth of a meter (1 cm = 0.01 m). It is used for measuring everyday objects — body height, clothing sizes, room furniture, and screen sizes. Most rulers show both centimeters and millimeters side by side, with each centimeter divided into 10 millimeter markings.
A millimeter is one-thousandth of a meter (1 mm = 0.001 m) and one-tenth of a centimeter. It is used for highly precise measurements in engineering, machining, medical devices, and technical drawings. Rainfall is also measured in millimeters by meteorologists worldwide.
| Real-World Object | Centimeters (cm) | Millimeters (mm) |
|---|---|---|
| SIM card thickness | 0.076 cm | 0.76 mm |
| Pencil diameter | 0.7 cm | 7 mm |
| Credit card thickness | 0.08 cm | 0.8 mm |
| Standard ruler | 30 cm | 300 mm |
| A4 paper width | 21 cm | 210 mm |
| Smartphone screen (6") | 15.24 cm | 152.4 mm |
| Average adult foot | 26 cm | 260 mm |
| Heavy rainfall (1 day) | 10 cm | 100 mm |
There are exactly 10 millimeters in 1 centimeter. This is the fundamental relationship — "milli" means one-thousandth and "centi" means one-hundredth, so 1 cm = 10 mm.
Simply multiply by 10 — or move the decimal point 1 place to the right. For example: 4.5 cm → 45 mm. Or 12 cm → 120 mm.
25 mm = 2.5 cm. Divide by 10: 25 ÷ 10 = 2.5 cm. Use the ⇄ swap button to convert mm back to cm instantly.
Yes, 10 mm = 1 cm exactly. On any standard ruler, you can see 10 small millimeter divisions within each centimeter marking.
150 cm = 1,500 mm. Multiply by 10: 150 × 10 = 1,500 mm. This is also equal to 1.5 meters.
Millimeters are preferred in engineering, manufacturing, and technical drawings because they allow precise measurements without decimals. For example, a bolt diameter of 8 mm is clearer than 0.8 cm in a technical specification.