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CM to MM Live Converter

CM to MM Live Converter

CM to MM Converter

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Tip: type centimeters to get millimeters and meters. Several values (new line, space or semicolon) and decimals like 12.5 or 12,5 also work.
Output appears here
 

Example 1: Convert 15 cm to MM

StepCalculationResult
1. Multiply by 1015 x 10150 mm
2. Divide by 100 for meters15 / 1000.15 m
3. Scientific notation150 mm1.5 x 10^2 mm
15 cm = 150 mm = 0.15 m.

Example 2: Convert 2.5 cm to MM

StepCalculationResult
1. Multiply by 102.5 x 1025 mm
2. Divide by 100 for meters2.5 / 1000.025 m
3. Scientific notation25 mm2.5 x 10^1 mm
2.5 cm = 25 mm = 0.025 m.

Standard Stationery & Object Scale (CM to MM)

Centimeters (cm)Millimeters (mm)Real Object Example
0.11Coin edge
110Small button
550Matchbox
15150Pocket scale
303001-Foot Ruler
1001000Meter stick

CM to MM Chart (1 to 100 cm)

Centimeters (cm)Millimeters (mm)Meters (m)
1100.01
2200.02
3300.03
4400.04
5500.05
6600.06
7700.07
8800.08
9900.09
101000.1
111100.11
121200.12
131300.13
141400.14
151500.15
161600.16
171700.17
181800.18
191900.19
202000.2
212100.21
222200.22
232300.23
242400.24
252500.25
262600.26
272700.27
282800.28
292900.29
303000.3
313100.31
323200.32
333300.33
343400.34
353500.35
363600.36
373700.37
383800.38
393900.39
404000.4
414100.41
424200.42
434300.43
444400.44
454500.45
464600.46
474700.47
484800.48
494900.49
505000.5
515100.51
525200.52
535300.53
545400.54
555500.55
565600.56
575700.57
585800.58
595900.59
606000.6
616100.61
626200.62
636300.63
646400.64
656500.65
666600.66
676700.67
686800.68
696900.69
707000.7
717100.71
727200.72
737300.73
747400.74
757500.75
767600.76
777700.77
787800.78
797900.79
808000.8
818100.81
828200.82
838300.83
848400.84
858500.85
868600.86
878700.87
888800.88
898900.89
909000.9
919100.91
929200.92
939300.93
949400.94
959500.95
969600.96
979700.97
989800.98
999900.99
10010001

Fractions of a Centimeter (0.1 to 2 cm)

Centimeters (cm)Millimeters (mm)
0.11
0.22
0.33
0.44
0.55
0.66
0.77
0.88
0.99
110
1.111
1.212
1.313
1.414
1.515
1.616
1.717
1.818
1.919
220

Common Sizes in CM and MM

ObjectCentimeters (cm)Millimeters (mm)Meters (m)
Sheet of printer paper (thickness)0.010.10.0001
Credit card thickness (ISO 7810)0.0760.760.00076
35 mm film width3.5350.035
AA battery length5.0550.50.0505
Credit card height (ISO 7810)5.39853.980.05398
Credit card width (ISO 7810)8.5685.60.0856
A4 paper width212100.21
US Letter paper width21.59215.90.2159
US Letter paper length27.94279.40.2794
A4 paper length29.72970.297
Standard school ruler303000.3
A3 paper length424200.42

CM to MM in Scientific Notation

Centimeters (cm)Centimeters (sci)Millimeters (sci)Meters (sci)
0.0011 x 10^-31 x 10^-21 x 10^-5
0.55 x 10^-15 x 10^05 x 10^-3
11 x 10^01 x 10^11 x 10^-2
151.5 x 10^11.5 x 10^21.5 x 10^-1
2502.5 x 10^22.5 x 10^32.5 x 10^0
100001 x 10^41 x 10^51 x 10^2
1500001.5 x 10^51.5 x 10^61.5 x 10^3

Technical Q&A / FAQ Matrix

Technical Developer QuestionExact Solution & Code Snippet
How do I convert cm to mm in JavaScript?15 * 10 // 150
How do I convert cm to mm in Python?15 * 10
How do I convert cm to mm in Go?fmt.Println(15 * 10)
How do I convert cm to mm in Java?double mm = 15 * 10.0;
How do I convert cm to mm in C#?double mm = 15 * 10.0;
How do I convert cm to mm in PHP?echo 15 * 10;
How do I convert cm to mm in Rust?let mm = 15.0 * 10.0;
How do I convert cm to mm on Linux?awk 'BEGIN { print 15 * 10 }'
How do I write mm in scientific notation in JavaScript?(15 * 10).toExponential() // 1.5e+2
How do I write mm in scientific notation in Python?format(15 * 10, '.1e') # 1.5e+02
How do I convert cm to mm by hand?Multiply by 10, which moves the decimal point one place to the right. 15 cm = 150 mm and 2.5 cm = 25 mm.
Why do I multiply by 10?One centimeter is exactly 10 millimeters, so cm x 10 = mm.
How do I convert cm to meters?Divide by 100, which moves the decimal point two places to the left. 15 cm = 0.15 m.
How do I convert mm back to cm?Divide by 10. For example 150 mm / 10 = 15 cm.
How do I convert cm to inches?Divide by 2.54. For example 15 cm = 5.9055 in.
Why does code show 10.049999999999999 for 1.005 * 10?Floating-point numbers store binary approximations of decimals. Round for display, for example (1.005 * 10).toFixed(2) gives 10.05. This tool uses exact decimal math, so it never shows that error.

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