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Convert cm to mm
Interactive centimeters to millimeters conversion tool
The cm to mm converter below can be used to quickly and easily convert centimeters to millimeters. Simply enter the number of centimeters you want to convert and the calculator will output the corresponding value in millimeters.
What is the conversion factor between centimeters and millimeters?
A conversion factor is used to change the units of a measured quantity without changing its value. It represents the ratio (or fraction) that expresses the relationship between two different units. A conversion factor is always equal to 1.
The relationship between centimeters and millimeters is 10, such as:
Following the formula above, we can see that there are 10 millimeters for every centimeter, and for every millimeter, there are 110 centimeters (0.1 cm).
To convert from centimeters to millimeters, we turn our formula into a conversion factor that is equal to 1.
Both these fractions are equal to 1. The numerator and the denominator are equivalent, they are just expressed in different units.
Because we are converting from centimeter to millimeter, we will use the first fraction: 10 mm1 cm so that centimeters are canceled out. We then multiply the value in centimeters by this fraction to get the result in millimeters (see example).
Note that cm is in the denominator (bottom) of the conversion factor. This is important, you always want to have the unit you are converting from at the bottom and the unit you are converting to in the numerator (top).
You will find below how to use this ratio to convert from cm to mm. Just remember for now that the conversion factor for converting from centimeters to millimeters is:
Which is bigger, a centimeter or a millimeter?
When it comes to measurements, there can be some confusion over which is bigger, a centimeter or an millimeter. To find out which one is larger, we must first convert one unit to the other and then compare them.
- 1 cm = 10 mm
- 10 millimeters is bigger than 1 millimeter.
- 1 centimeter is, therefore, bigger than 1 millimeter.
- To be more specific, a millimeter is 10 times smaller than a centimeter.
centimeters to millimeters conversion table
| centimeters | millimeters | centimeters | millimeters |
|---|---|---|---|
| 1 cm | 10 mm | 11 cm | 110 mm |
| 2 cm | 20 mm | 12 cm | 120 mm |
| 3 cm | 30 mm | 13 cm | 130 mm |
| 4 cm | 40 mm | 14 cm | 140 mm |
| 5 cm | 50 mm | 15 cm | 150 mm |
| 6 cm | 60 mm | 16 cm | 160 mm |
| 7 cm | 70 mm | 17 cm | 170 mm |
| 8 cm | 80 mm | 18 cm | 180 mm |
| 9 cm | 90 mm | 19 cm | 190 mm |
| 10 cm | 100 mm | 20 cm | 200 mm |
How to convert centimeters to millimeters?
Multiplying any value by 1 will get you the same value back. You can do that one time or multiple times.
For example:
- 63 x 1 = 63
- 840 x 1 x 1 x 1 = 840
Multiplying by 1 is the first step in any unit conversion problem. The second step is to replace the number 1 with the conversion factor that is also equal to 1.
For example, if we want to convert 1000 centimeters into millimeters we multiply 1000 cm by the conversion factor of 10 mm1 cm
By replacing the number 1 with the conversion factor, centimeters are canceled out and we get the result in millimeters. And since the conversion factor is equal to 1, multiplying it with the original value won't change its magnitude and will only change its unit.
Based on this, we can conclude that 1000 centimeters are equal to 10000 millimeters.
Remember:
- When converting from centimeters to millimeters, we use 10 mm1 cm as a conversion factor.
Practice: centimeters to millimeters conversion
Try answering the following questions without using our custom conversion calculator. Knowing how to convert manually between centimeters and millimeters could prove to be useful, so give it a shot. Once you are confident you can convert centimeters to millimeters, there is no harm then in taking full advantage of the tools available to you.
How to convert 12 centimeters to millimeters?
We multiply 12 by the factor of 1
We replace the number 1 with the conversion factor for centimeters to millimeters
We multiply 12 centimeters by the conversion factor. Having centimeters in the denominator allows us to cancel out the undesired units (cm) leaving only millimeters in the final result.
Answer: There are 120 millimeters in 12 centimeters
How many millimeters are in 430 centimeters?
Multiply 430 by the conversion factor. Make sure the unwanted unit (cm) is in the denominator.
This allows us to cancel out the centimeters (cm) and leave the millimeters (mm)
Answer: There are 4300 millimeters in 430 centimeters
millimeters to centimeters conversion
- 1 mm = 110 cm = 0.1 cm
- To convert from millimeters to centimeters use our mm to cm converter
centimeters conversion
Convert from Centimeters (cm):
- Centimeters to kilometers (cm to km)
1 cm = 1100000 km = 1e-5 km - Centimeters to meters (cm to m)
1 cm = 1100 m = 0.01 m - Centimeters to millimeters (cm to mm)
1 cm = 10 mm - Centimeters to micrometers (cm to μm)
1 cm = 10000 μm - Centimeters to nanometers (cm to nm)
1 cm = 1e+7 nm - Centimeters to nautical miles (cm to nmi)
1 cm = 1185200 nmi = 5.399568035e-6 nmi - Centimeters to miles (cm to mi)
1 cm = 1160934.4 mi = 6.213711922e-6 mi - Centimeters to yards (cm to yd)
1 cm = 191.44 yd = 0.01093613298 yd - Centimeters to feet (cm to ft)
1 cm = 130.48 ft = 0.03280839895 ft - Centimeters to inches (cm to in)
1 cm = 12.54 in = 0.3937007874 in
Convert to Centimeters (cm):
- Kilometers to centimeters (km to cm)
1 km = 100000 cm - Meters to centimeters (m to cm)
1 m = 100 cm - Millimeters to centimeters (mm to cm)
1 mm = 110 cm = 0.1 cm - Micrometers to centimeters (μm to cm)
1 μm = 110000 cm = 1e-4 cm - Nanometers to centimeters (nm to cm)
1 nm = 11e+7 cm = 1e-7 cm - Nautical miles to centimeters (nmi to cm)
1 nmi = 185200 cm - Miles to centimeters (mi to cm)
1 mi = 160934.4 cm - Yards to centimeters (yd to cm)
1 yd = 91.44 cm - Feet to centimeters (ft to cm)
1 ft = 30.48 cm - Inches to centimeters (in to cm)
1 in = 2.54 cm
millimeters conversion
Convert from Millimeters (mm):
- Millimeters to kilometers (mm to km)
1 mm = 11e+6 km = 1e-6 km - Millimeters to meters (mm to m)
1 mm = 11000 m = 0.001 m - Millimeters to centimeters (mm to cm)
1 mm = 110 cm = 0.1 cm - Millimeters to micrometers (mm to μm)
1 mm = 1000 μm - Millimeters to nanometers (mm to nm)
1 mm = 1e+6 nm - Millimeters to nautical miles (mm to nmi)
1 mm = 11.852e+6 nmi = 5.399568035e-7 nmi - Millimeters to miles (mm to mi)
1 mm = 11.609344e+6 mi = 6.213711922e-7 mi - Millimeters to yards (mm to yd)
1 mm = 1914.4 yd = 0.001093613298 yd - Millimeters to feet (mm to ft)
1 mm = 1304.8 ft = 0.003280839895 ft - Millimeters to inches (mm to in)
1 mm = 125.4 in = 0.03937007874 in
Convert to Millimeters (mm):
- Kilometers to millimeters (km to mm)
1 km = 1e+6 mm - Meters to millimeters (m to mm)
1 m = 1000 mm - Centimeters to millimeters (cm to mm)
1 cm = 10 mm - Micrometers to millimeters (μm to mm)
1 μm = 11000 mm = 0.001 mm - Nanometers to millimeters (nm to mm)
1 nm = 11e+6 mm = 1e-6 mm - Nautical miles to millimeters (nmi to mm)
1 nmi = 1.852e+6 mm - Miles to millimeters (mi to mm)
1 mi = 1.609344e+6 mm - Yards to millimeters (yd to mm)
1 yd = 914.4 mm - Feet to millimeters (ft to mm)
1 ft = 304.8 mm - Inches to millimeters (in to mm)
1 in = 25.4 mm