Unit Converter
Conversion formula
The conversion factor from centimeters to millimeters is 10, which means that 1 centimeter is equal to 10 millimeters:
1 cm = 10 mm
To convert 18 centimeters into millimeters we have to multiply 18 by the conversion factor in order to get the length amount from centimeters to millimeters. We can also form a simple proportion to calculate the result:
1 cm → 10 mm
18 cm → L(mm)
Solve the above proportion to obtain the length L in millimeters:
L(mm) = 18 cm × 10 mm
L(mm) = 180 mm
The final result is:
18 cm → 180 mm
We conclude that 18 centimeters is equivalent to 180 millimeters:
18 centimeters = 180 millimeters
Alternative conversion
We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.0055555555555556 × 18 centimeters.
Another way is saying that 18 centimeters is equal to 1 ÷ 0.0055555555555556 millimeters.
Approximate result
For practical purposes we can round our final result to an approximate numerical value. We can say that eighteen centimeters is approximately one hundred eighty millimeters:
18 cm ≅ 180 mm
An alternative is also that one millimeter is approximately zero point zero zero six times eighteen centimeters.
Conversion table
centimeters to millimeters chart
For quick reference purposes, below is the conversion table you can use to convert from centimeters to millimeters
centimeters (cm) | millimeters (mm) |
---|---|
19 centimeters | 190 millimeters |
20 centimeters | 200 millimeters |
21 centimeters | 210 millimeters |
22 centimeters | 220 millimeters |
23 centimeters | 230 millimeters |
24 centimeters | 240 millimeters |
25 centimeters | 250 millimeters |
26 centimeters | 260 millimeters |
27 centimeters | 270 millimeters |
28 centimeters | 280 millimeters |