Millimeters to Centimeters (mm to cm) Converter
1 millimeter (mm) = 0.1 centimeters (cm). To convert millimeters to centimeters, multiply by 0.1: 297 mm × 0.1 = 29.7 cm. Also searched as millimetres to centimetres.
Quick facts
- 1 mm = 0.1 cm
- 1 cm = 10 mm
- Formula: cm = mm × 0.1
- Quick estimate: multiply by about 0.1
How to convert millimeters to centimeters
- Take the value in millimeters.
- Multiply it by 0.1 (the number of centimeters in one millimeter).
- Round the result to the precision you need.
Worked example (the long side of an A4 sheet): 297 mm × 0.1 = 29.7 cm.
To convert centimeters back to millimeters, multiply by 10, or divide by 0.1.
Source: NIST Special Publication 811 (2008), Appendix B; the international yard and pound agreement of 1959 (1 inch = 25.4 mm exactly).
Millimeters to Centimeters conversion table
| Millimeters [mm] | Centimeters [cm] |
|---|---|
| 0.01 mm | 0.001 cm |
| 0.1 mm | 0.01 cm |
| 1 mm | 0.1 cm |
| 2 mm | 0.2 cm |
| 3 mm | 0.3 cm |
| 5 mm | 0.5 cm |
| 10 mm | 1 cm |
| 20 mm | 2 cm |
| 50 mm | 5 cm |
| 100 mm | 10 cm |
| 1000 mm | 100 cm |
mm to cm chart from 1 to 100
- 1 mm 0.1 cm
- 2 mm 0.2 cm
- 3 mm 0.3 cm
- 4 mm 0.4 cm
- 5 mm 0.5 cm
- 6 mm 0.6 cm
- 7 mm 0.7 cm
- 8 mm 0.8 cm
- 9 mm 0.9 cm
- 10 mm 1 cm
- 11 mm 1.1 cm
- 12 mm 1.2 cm
- 13 mm 1.3 cm
- 14 mm 1.4 cm
- 15 mm 1.5 cm
- 16 mm 1.6 cm
- 17 mm 1.7 cm
- 18 mm 1.8 cm
- 19 mm 1.9 cm
- 20 mm 2 cm
- 25 mm 2.5 cm
- 30 mm 3 cm
- 35 mm 3.5 cm
- 40 mm 4 cm
- 45 mm 4.5 cm
- 50 mm 5 cm
- 55 mm 5.5 cm
- 60 mm 6 cm
- 65 mm 6.5 cm
- 70 mm 7 cm
- 75 mm 7.5 cm
- 80 mm 8 cm
- 85 mm 8.5 cm
- 90 mm 9 cm
- 95 mm 9.5 cm
- 100 mm 10 cm
Centimeters to Millimeters conversion table
| Centimeters [cm] | Millimeters [mm] |
|---|---|
| 0.01 cm | 0.1 mm |
| 0.1 cm | 1 mm |
| 1 cm | 10 mm |
| 2 cm | 20 mm |
| 3 cm | 30 mm |
| 5 cm | 50 mm |
| 10 cm | 100 mm |
| 20 cm | 200 mm |
| 50 cm | 500 mm |
| 100 cm | 1000 mm |
| 1000 cm | 10000 mm |
Millimeters vs Centimeters
| Millimeter | Centimeter | |
|---|---|---|
| Symbol | mm | cm |
| Equals | 1 mm = 0.1 cm | 1 cm = 10 mm |
What is a millimeter?
One thousandth of a meter, the SI base unit of length. Used for small, precise measurements in engineering, printing, and manufacturing tolerances.
What is a centimeter?
One hundredth of a meter — a common everyday metric unit. Used worldwide for height, clothing sizes, and small object measurements outside the US.
Frequently asked questions
How many centimeters are in a millimeter?
There are 0.1 centimeters in 1 millimeter (1 mm = 0.1 cm).
How many millimeters are in a centimeter?
There are 10 millimeters in 1 centimeter (1 cm = 10 mm).
How do I convert millimeters to centimeters?
Multiply the number of millimeters by 0.1. For example, 10 mm × 0.1 = 1 cm. To convert back, multiply by 10.
What is 10 mm in centimeters?
10 mm = 1 cm.
What is 100 mm in centimeters?
100 mm = 10 cm.
Is the conversion exact?
Yes. The factor comes from the official definitions of both units (NIST Special Publication 811 (2008), Appendix B; the international yard and pound agreement of 1959 (1 inch = 25.4 mm exactly)). Results are shown to up to 10 decimal places; round them to suit your purpose.
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