# Convert millimeters to centimeters

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

millimeters (mm)
1 millimeters = 0.1 centimeters

## Precise decimal and fraction answers

The conversion in centimeters rounded to six significant decimal places is 1 mm = 0.100000 cm. The precise fraction answer is 1/10 cm.

### Decimal Precision

Conversion from one to ten decimal places

• 1 mm = 0.1 cm
• 1 mm = 0.10 cm
• 1 mm = 0.100 cm
• 1 mm = 0.1000 cm
• 1 mm = 0.10000 cm
• 1 mm = 0.100000 cm
• 1 mm = 0.1000000 cm
• 1 mm = 0.10000000 cm
• 1 mm = 0.100000000 cm
• 1 mm = 0.1000000000 cm

## How many centimeters are in a millimeter?

There are 0.1 centimeters in one millimeter. A millimeter is 10.00% of a centimeter. A centimeter is 900% longer than one millimeter.

## Millimeters to centimeters conversion factor and formulas

Formula

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

### Division

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

### Multiplication

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

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

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.

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.

## Reverse this conversion

Convert from centimeters to millimeters instead.

## 1 millimeters to other length units

### Metric

• 1 mm = 1×10-6 km
• 1 mm = 0.001 m
• 1 mm = 0.01 dm
• 1 mm = 0.1 cm
• 1 mm = 1 mm
• 1 mm = 1,000 µ
• 1 mm = 1,000,000 nm

### Imperial/U.S.

• 1 mm = 6.214×10-7 mi
• 1 mm = 0.001 yd
• 1 mm = 0.003 ft
• 1 mm = 0.039 in

## References and Citations

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

mm cm
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
mm cm
20 mm 2 cm
30 mm 3 cm
40 mm 4 cm
50 mm 5 cm
60 mm 6 cm
70 mm 7 cm
80 mm 8 cm
90 mm 9 cm
100 mm 10 cm
1,000 mm 100 cm