# Convert centimeters to millimeters

Enter the number of centimeters you want to convert to millimeters in the text box below. The conversion to length in millimeters will update as you type.

centimeters (cm)
1 centimeters = 10 millimeters

## Precise decimal and fraction answers

The conversion in millimeters rounded to six significant decimal places is 1 cm = 10.000000 mm. The precise fraction answer is 10 0/1 mm.

### Decimal Precision

Conversion from one to ten decimal places

• 1 cm = 10.0 mm
• 1 cm = 10.00 mm
• 1 cm = 10.000 mm
• 1 cm = 10.0000 mm
• 1 cm = 10.00000 mm
• 1 cm = 10.000000 mm
• 1 cm = 10.0000000 mm
• 1 cm = 10.00000000 mm
• 1 cm = 10.000000000 mm
• 1 cm = 10.0000000000 mm

## How many millimeters are in a centimeter?

There are 10 millimeters in one centimeter. A centimeter is 10 times longer than a millimeter. A millimeter is 10.00% of a centimeter

## Centimeters to millimeters conversion factor and formulas

Formula

The conversion factor between centimeters and millimeters is 10. This represents the ratio of millimeters per one centimeter. To calculate the value in millimeters, we can either multiply by the conversion factor or divide by its inverse.

### Multiplication

To convert from centimeters to millimeters, multiply centimeters by 10.
The formula is expressed as:
cm × 10 = mm

### Division

Alternatively we can divide by the inverse conversion factor to get the same result.
The inverse of 10 is 1/10 or 0.1. To convert from centimeters to millimeters, divide centimeters by 0.1.
The formula is expressed as:
cm ÷ 0.1 = mm

A conversion from centimeters to millimeters are units within in the metric (SI) or SI compatible systems.

SI Unit

Within the SI (metric) system of measurement, the centimeter is officially defined as one hundredth (1/100) of a meter. It is commonly used as measurement from shorter lengths. Internationally it is spelled 'centimetre' whereas the U.S. spells it 'centimeter'. The symbol for centimeters is cm.

SI Unit

Within the SI (metric) system of measurement, the millimeter is officially defined as one thousandth (1/1,000) of a meter. It is commonly used when measuring very short lengths. Internationally it is spelled 'millimetre' whereas the U.S. spells it 'millimeter'. The symbol for millimeters is mm.

## Reverse this conversion

Convert from millimeters to centimeters instead.

## 1 centimeters to other length units

### Metric

• 1 cm = 1×10-5 km
• 1 cm = 0.01 m
• 1 cm = 0.1 dm
• 1 cm = 1 cm
• 1 cm = 10 mm
• 1 cm = 10,000 µ
• 1 cm = 1×107 nm

### Imperial/U.S.

• 1 cm = 6.214×10-6 mi
• 1 cm = 0.011 yd
• 1 cm = 0.033 ft
• 1 cm = 0.394 in

## References and Citations

1. International Bureau of Weights and Measures (BIPM) The International System of Units (SI)

## Centimeters to millimeters conversion table

cm mm
1 cm 10 mm
2 cm 20 mm
3 cm 30 mm
4 cm 40 mm
5 cm 50 mm
6 cm 60 mm
7 cm 70 mm
8 cm 80 mm
9 cm 90 mm
10 cm 100 mm
cm mm
20 cm 200 mm
30 cm 300 mm
40 cm 400 mm
50 cm 500 mm
60 cm 600 mm
70 cm 700 mm
80 cm 800 mm
90 cm 900 mm
100 cm 1,000 mm
1,000 cm 10,000 mm