Convert Millimeters to Centimeters

Enter the length in millimeters below to get the value converted to centimeters.

Results in Centimeters:
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1 mm = 0.1 cm

How to Convert Millimeters to Centimeters

Tape measures can be used to measure units of length, and a calculator can be used to convert to another unit

Convert millimeters to centimeters with this simple formula:

centimeters = millimeters × 0.1

Converting a millimeter length measurement to a centimeter measurement involves multiplying the length by the conversion ratio to find the result. One millimeter is equal to 0.1 centimeters, so to convert simply multiply by 0.1.

For example, here's how to convert 5 millimeters to centimeters using the formula above.
5 mm = (5 × 0.1) = 0.5 cm

Our inch fraction calculator can add millimeters and centimeters together and it also automatically converts the results to US customary, imperial and SI metric values.

Millimeters and centimeters are both units used to measure length. Learn more about length and find more length measurement conversion calculators. Millimeters are a metric measurement and can be abbreviated as mm, for example 1 mm. Centimeters are a metric measurement and can be abbreviated as cm, for example 1 cm. Learn more about the metric system, including the common unit prefixes and how to convert between metric units.

Millimeter is spelled millimetre internationally, and it is equal in length to .1 centimeters, 1000 micrometers, or 5/127 inch. They are represented by the smallest ticks on most metric rulers. To get a reference point of the size, the thickness of a dime is 1.35mm.

To get an idea of how small a millimeter is, a dime is 1.35mm thick.

Internationally the centimeter is actually spelled centimetre and it's equal to 10 millimeters, .01 meters, or .393701 inches. Metric rulers have 30 cm and they are the larger measurement. A standard pencil is just about 1cm thick, and can be used to get a rough idea of the size of a centimeter.

A pencil is just about 1cm thick and is a good reference point for a centimeter's actual size

We recommend using a ruler or tape measure for measuring length, which can be found at a local retailer or home center. Rulers are available in imperial, metric, or combination with both values, so make sure you get the correct type for your needs. If you need a ruler you can also download and print our free printable rulers which include both imperial and metric measurements.

millimeters and centimeters are units used to measure length
Convert Centimeters to Millimeters

Millimeter Measurements and Equivalent Centimeter Conversions

Common millimeter values converted to the equivalent centimeter value
Millimeters Centimeters
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
21 mm 2.1 cm
22 mm 2.2 cm
23 mm 2.3 cm
24 mm 2.4 cm
25 mm 2.5 cm
26 mm 2.6 cm
27 mm 2.7 cm
28 mm 2.8 cm
29 mm 2.9 cm
30 mm 3 cm
31 mm 3.1 cm
32 mm 3.2 cm
33 mm 3.3 cm
34 mm 3.4 cm
35 mm 3.5 cm
36 mm 3.6 cm
37 mm 3.7 cm
38 mm 3.8 cm
39 mm 3.9 cm
40 mm 4 cm

More Millimeter Length Conversions

US Customary & Imperial Units
Convert to Miles
1 mm is equal to 6.2137E-7 miles
Convert to Yards
1 mm is equal to 0.001094 yards
Convert to Feet
1 mm is equal to 0.003281 feet
Convert to Inches
1 mm is equal to 0.03937 inches
SI Units
Convert to Kilometers
1 mm is equal to 1.0E-6 kilometers
Convert to Meters
1 mm is equal to 0.001 meters
Convert to Micrometers
1 mm is equal to 1,000 micrometers
Convert to Nanometers
1 mm is equal to 1,000,000 nanometers