This length unit converter dynamically calculates the value you enter in **millimeters (mm)** and converts it to its equivalent value in **kilometers (km)**.

## Convert millimeters to other units of length:

- millimeters to nanometers
- millimeters to micrometers
- millimeters to centimeters
- millimeters to decimeters
- millimeters to meters
- millimeters to kilometers
**millimeters to inches**- millimeters to feet
- millimeters to yards
- millimeters to miles
- millimeters to nautical miles

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## How many millimeters (mm) are in 1 kilometer (km)? What is the formula for how to convert millimeters to kilometers (mm to km)?

**1 millimeter (mm) = 0.000001 kilometer (km)**

So we can say that there is 0.000001 kilometer in 1 millimeter.

This means that the multiplication conversion factor to convert a quantity expressed in a millimeter unit of measurement to an equivalent quantity expressed in a kilometer unit of measurement is 0.000001.

Inversely (or reciprocally),

**1 kilometer (km) = 1,000,000 millimeters (mm)**

So we can say that there are 1,000,000 millimeters in 1 kilometer.

This means that the division conversion factor to convert a quantity expressed in a millimeter unit of measurement to an equivalent quantity expressed in a kilometer unit of measurement is 1,000,000.

Knowing this inverse mathematical relationship between the two conversion factors and their reciprocal operations, we can derive two formulas to calculate and convert a quantity of length expressed in millimeters to an equivalent quantity of length expressed in kilometers (mm to km). Both formulas will yield the same result. The formulas are:

km = mm × 0.000001→ This is the formula based on the multiplication conversion factor.

and

km = mm ÷ 1,000,000→ This is the formula based on the division conversion factor.

For example, if you have a length of 85.5 millimeters that you want to convert to kilometers, you would use either of the two formulas as follows:

km = 85.5 mm × 0.000001 = 0.0000855 km

km = 85.5 mm ÷ 1,000,000 = 0.0000855 km

So, the result is the same using either formula, which is 0.0000855 kilometer.

## Millimeters to kilometers (mm to km) conversion chart

To save you time and effort spent on having to perform manual calculations or look up conversion formulas every time a conversion from millimeters to kilometers is needed, here is a millimeters-to-kilometers conversion chart for your quick and easy reference. This conversion chart (or conversion table) shows common measurement values of length in millimeters and their equivalent measurement values in kilometers. These equivalent measurement values may be rounded off to 1 or 2 decimal places when it is mathematically expedient for everyday applications.

millimeters (mm) | kilometers (km) |
---|---|

1 mm | 0.000001 km |

2 mm | 0.000002 km |

3 mm | 0.000003 km |

4 mm | 0.000004 km |

5 mm | 0.000005 km |

6 mm | 0.000006 km |

7 mm | 0.000007 km |

8 mm | 0.000008 km |

9 mm | 0.000009 km |

10 mm | 0.000010 km |

11 mm | 0.000011 km |

12 mm | 0.000012 km |

13 mm | 0.000013 km |

14 mm | 0.000014 km |

15 mm | 0.000015 km |

16 mm | 0.000016 km |

17 mm | 0.000017 km |

18 mm | 0.000018 km |

19 mm | 0.000019 km |

20 mm | 0.000020 km |

21 mm | 0.000021 km |

22 mm | 0.000022 km |

23 mm | 0.000023 km |

24 mm | 0.000024 km |

25 mm | 0.000025 km |

26 mm | 0.000026 km |

27 mm | 0.000027 km |

28 mm | 0.000028 km |

29 mm | 0.000029 km |

30 mm | 0.000030 km |

31 mm | 0.000031 km |

32 mm | 0.000032 km |

33 mm | 0.000033 km |

34 mm | 0.000034 km |

35 mm | 0.000035 km |

36 mm | 0.000036 km |

37 mm | 0.000037 km |

38 mm | 0.000038 km |

39 mm | 0.000039 km |

40 mm | 0.000040 km |

41 mm | 0.000041 km |

42 mm | 0.000042 km |

43 mm | 0.000043 km |

44 mm | 0.000044 km |

45 mm | 0.000045 km |

46 mm | 0.000046 km |

47 mm | 0.000047 km |

48 mm | 0.000048 km |

49 mm | 0.000049 km |

50 mm | 0.000050 km |

51 mm | 0.000051 km |

52 mm | 0.000052 km |

53 mm | 0.000053 km |

54 mm | 0.000054 km |

55 mm | 0.000055 km |

56 mm | 0.000056 km |

57 mm | 0.000057 km |

58 mm | 0.000058 km |

59 mm | 0.000059 km |

60 mm | 0.000060 km |

61 mm | 0.000061 km |

62 mm | 0.000062 km |

63 mm | 0.000063 km |

64 mm | 0.000064 km |

65 mm | 0.000065 km |

66 mm | 0.000066 km |

67 mm | 0.000067 km |

68 mm | 0.000068 km |

69 mm | 0.000069 km |

70 mm | 0.000070 km |

71 mm | 0.000071 km |

72 mm | 0.000072 km |

73 mm | 0.000073 km |

74 mm | 0.000074 km |

75 mm | 0.000075 km |

76 mm | 0.000076 km |

77 mm | 0.000077 km |

78 mm | 0.000078 km |

79 mm | 0.000079 km |

80 mm | 0.000080 km |

81 mm | 0.000081 km |

82 mm | 0.000082 km |

83 mm | 0.000083 km |

84 mm | 0.000084 km |

85 mm | 0.000085 km |

86 mm | 0.000086 km |

87 mm | 0.000087 km |

88 mm | 0.000088 km |

89 mm | 0.000089 km |

90 mm | 0.000090 km |

91 mm | 0.000091 km |

92 mm | 0.000092 km |

93 mm | 0.000093 km |

94 mm | 0.000094 km |

95 mm | 0.000095 km |

96 mm | 0.000096 km |

97 mm | 0.000097 km |

98 mm | 0.000098 km |

99 mm | 0.000099 km |

100 mm | 0.000100 km |

millimeters (mm) | kilometers (km) |
---|---|

101 mm | 0.000101 km |

102 mm | 0.000102 km |

103 mm | 0.000103 km |

104 mm | 0.000104 km |

105 mm | 0.000105 km |

106 mm | 0.000106 km |

107 mm | 0.000107 km |

108 mm | 0.000108 km |

109 mm | 0.000109 km |

110 mm | 0.000110 km |

111 mm | 0.000111 km |

112 mm | 0.000112 km |

113 mm | 0.000113 km |

114 mm | 0.000114 km |

115 mm | 0.000115 km |

116 mm | 0.000116 km |

117 mm | 0.000117 km |

118 mm | 0.000118 km |

119 mm | 0.000119 km |

120 mm | 0.000120 km |

121 mm | 0.000121 km |

122 mm | 0.000122 km |

123 mm | 0.000123 km |

124 mm | 0.000124 km |

125 mm | 0.000125 km |

126 mm | 0.000126 km |

127 mm | 0.000127 km |

128 mm | 0.000128 km |

129 mm | 0.000129 km |

130 mm | 0.000130 km |

131 mm | 0.000131 km |

132 mm | 0.000132 km |

133 mm | 0.000133 km |

134 mm | 0.000134 km |

135 mm | 0.000135 km |

136 mm | 0.000136 km |

137 mm | 0.000137 km |

138 mm | 0.000138 km |

139 mm | 0.000139 km |

140 mm | 0.000140 km |

141 mm | 0.000141 km |

142 mm | 0.000142 km |

143 mm | 0.000143 km |

144 mm | 0.000144 km |

145 mm | 0.000145 km |

146 mm | 0.000146 km |

147 mm | 0.000147 km |

148 mm | 0.000148 km |

149 mm | 0.000149 km |

150 mm | 0.000150 km |

151 mm | 0.000151 km |

152 mm | 0.000152 km |

153 mm | 0.000153 km |

154 mm | 0.000154 km |

155 mm | 0.000155 km |

156 mm | 0.000156 km |

157 mm | 0.000157 km |

158 mm | 0.000158 km |

159 mm | 0.000159 km |

160 mm | 0.000160 km |

161 mm | 0.000161 km |

162 mm | 0.000162 km |

163 mm | 0.000163 km |

164 mm | 0.000164 km |

165 mm | 0.000165 km |

166 mm | 0.000166 km |

167 mm | 0.000167 km |

168 mm | 0.000168 km |

169 mm | 0.000169 km |

170 mm | 0.000170 km |

171 mm | 0.000171 km |

172 mm | 0.000172 km |

173 mm | 0.000173 km |

174 mm | 0.000174 km |

175 mm | 0.000175 km |

176 mm | 0.000176 km |

177 mm | 0.000177 km |

178 mm | 0.000178 km |

179 mm | 0.000179 km |

180 mm | 0.000180 km |

181 mm | 0.000181 km |

182 mm | 0.000182 km |

183 mm | 0.000183 km |

184 mm | 0.000184 km |

185 mm | 0.000185 km |

186 mm | 0.000186 km |

187 mm | 0.000187 km |

188 mm | 0.000188 km |

189 mm | 0.000189 km |

190 mm | 0.000190 km |

191 mm | 0.000191 km |

192 mm | 0.000192 km |

193 mm | 0.000193 km |

194 mm | 0.000194 km |

195 mm | 0.000195 km |

196 mm | 0.000196 km |

197 mm | 0.000197 km |

198 mm | 0.000198 km |

199 mm | 0.000199 km |

200 mm | 0.000200 km |

## Conversion factor of 1 millimeter to other units of length

Here is a reference list providing a conversion of 1 millimeter (mm) to its equivalent values in various units of length, both metric and imperial:

- 1 millimeter (mm) = 1,000,000 nanometers (nm)
- 1 millimeter (mm) = 1,000 micrometers (µm)
- 1 millimeter (mm) = 0.1 centimeter (cm)
- 1 millimeter (mm) = 0.01 decimeter (dm)
- 1 millimeter (mm) = 0.001 meter (m)
- 1 millimeter (mm) = 0.000001 kilometer (km)
- 1 millimeter (mm) = 0.039370078740157 inch (in)
- 1 millimeter (mm) = 0.0032808398950131 foot (ft)
- 1 millimeter (mm) = 0.0010936132983377 yard (yd)
- 1 millimeter (mm) = 0.00000062137119223733 mile (mi)
- 1 millimeter (mm) = 0.00000053995680345572 nautical mile (nmi)

## What is a millimeter (mm)?

**Definition of millimeter:** A millimeter is a unit of length in the International System of Units (SI). It is equivalent to one thousandth of a meter (10^-3 m). It is commonly used for precisely measuring small lengths and dimensions such as mechanical parts in engineering and manufacturing.

The abbreviation for millimeter is **mm**. The single Unicode character **㎜** (U+339C) represents the 2-character Latin abbreviation for millimeter. The Windows Alt code for this character **㎜** is Alt + 13212.

## What is a kilometer (km)?

**Definition of kilometer:** A kilometer is a unit of length in the International System of Units (SI), commonly known as the metric system, equal to one thousand meters (10^3 m). It is commonly used for longer distances, such as races, road distances and geographical features.

The abbreviation for kilometer is **km**. The single Unicode character **㎞** (U+339E) represents the 2-character Latin abbreviation for kilometer. The Windows Alt code for this character **㎞** is Alt + 13214.