Sumwise

Centimeters to millimeters

millimeters = centimeters × 10

Reverse: millimeters to centimeters

How to convert centimeters to millimeters

One centimeter is 10 millimeters, so multiply the number of centimeters by 10. For example, 20 centimeters is 20 × 10 = 200 millimeters. To go back, divide by the same number, or multiply by 0.1.

Quick estimate

Multiplying by about 10 gets within 0.0% of the exact answer, which is enough to check that a result makes sense.

Where it comes up

Length conversions come up in DIY and building plans, running and cycling distances, maps, clothing sizes and travel between countries that use metric and imperial units.

centimetersmillimeters
1 cm10 mm
2 cm20 mm
3 cm30 mm
4 cm40 mm
5 cm50 mm
6 cm60 mm
7 cm70 mm
8 cm80 mm
9 cm90 mm
10 cm100 mm
11 cm110 mm
12 cm120 mm
13 cm130 mm
14 cm140 mm
15 cm150 mm
16 cm160 mm
17 cm170 mm
18 cm180 mm
19 cm190 mm
20 cm200 mm
25 cm250 mm
30 cm300 mm
40 cm400 mm
50 cm500 mm
60 cm600 mm
70 cm700 mm
75 cm750 mm
80 cm800 mm
90 cm900 mm
100 cm1,000 mm
120 cm1,200 mm
150 cm1,500 mm
200 cm2,000 mm
250 cm2,500 mm
300 cm3,000 mm
400 cm4,000 mm
500 cm5,000 mm
750 cm7,500 mm
1,000 cm10,000 mm
1,500 cm15,000 mm
2,000 cm20,000 mm
5,000 cm50,000 mm
10,000 cm100,000 mm

Questions

How many millimeters are in a centimeter?

10 millimeters.

How do I convert centimeters to millimeters in a spreadsheet?

Put the value in A1 and type =A1*10, then fill the formula down the column.

Are the values in the table exact?

They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.