Micrometers (µm) to Millimeters (mm) Converter

This length unit converter dynamically calculates a value you enter in micrometers (µm) and converts it to its equivalent value in millimeters (mm). A micrometer is also known as a micron.

How many micrometers (µm) are in a millimeter (mm)? What is the formula for how to convert micrometers to millimeters (µm to mm)?

1 micrometer (µm) = 0.001 millimeter (mm)
So we can say that there is 0.001 millimeter in 1 micrometer.
This means that the multiplication conversion factor to convert a quantity expressed in a micrometer unit of measurement to an equivalent quantity expressed in a millimeter unit of measurement is 0.001.

Inversely (or reciprocally),

1 millimeter (mm) = 1,000 micrometers (µm)
So we can say that there is 1,000 micrometers in 1 millimeter.
This means that the division conversion factor to convert a quantity expressed in a micrometer unit of measurement to an equivalent quantity expressed in a millimeter unit of measurement is 1,000.

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 micrometers to an equivalent quantity of length expressed in millimeters (µm to mm). Both formulas will yield the same result. The formulas are:

mm = µm × 0.001    → This is the formula based on the multiplication conversion factor.

and

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

For example, if you have a length of 17,500 micrometers that you want to convert to millimeters, you would use either of the two formulas as follows:

mm = 17,500 µm × 0.001 = 17.5 mm
mm = 17,500 µm ÷ 1,000 = 17.5 mm

So, the result is the same using either formula, which is 17.5 millimeters.

Micrometers to millimeters (µm to mm) 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 micrometers to millimeters is needed, here is a micrometers-to-millimeters conversion chart for your quick and easy reference. This conversion chart (or conversion table) shows common measurement values of length in micrometers and their equivalent measurement values in millimeters. These equivalent measurement values may be rounded off to 1 or 2 decimal places when it is mathematically expedient for everyday applications.

micrometers (µm)millimeters (mm)
1 µm0.001 mm
2 µm0.002 mm
3 µm0.003 mm
4 µm0.004 mm
5 µm0.005 mm
6 µm0.006 mm
7 µm0.007 mm
8 µm0.008 mm
9 µm0.009 mm
10 µm0.010 mm
11 µm0.011 mm
12 µm0.012 mm
13 µm0.013 mm
14 µm0.014 mm
15 µm0.015 mm
16 µm0.016 mm
17 µm0.017 mm
18 µm0.018 mm
19 µm0.019 mm
20 µm0.020 mm
21 µm0.021 mm
22 µm0.022 mm
23 µm0.023 mm
24 µm0.024 mm
25 µm0.025 mm
26 µm0.026 mm
27 µm0.027 mm
28 µm0.028 mm
29 µm0.029 mm
30 µm0.030 mm
31 µm0.031 mm
32 µm0.032 mm
33 µm0.033 mm
34 µm0.034 mm
35 µm0.035 mm
36 µm0.036 mm
37 µm0.037 mm
38 µm0.038 mm
39 µm0.039 mm
40 µm0.040 mm
41 µm0.041 mm
42 µm0.042 mm
43 µm0.043 mm
44 µm0.044 mm
45 µm0.045 mm
46 µm0.046 mm
47 µm0.047 mm
48 µm0.048 mm
49 µm0.049 mm
50 µm0.050 mm
51 µm0.051 mm
52 µm0.052 mm
53 µm0.053 mm
54 µm0.054 mm
55 µm0.055 mm
56 µm0.056 mm
57 µm0.057 mm
58 µm0.058 mm
59 µm0.059 mm
60 µm0.060 mm
61 µm0.061 mm
62 µm0.062 mm
63 µm0.063 mm
64 µm0.064 mm
65 µm0.065 mm
66 µm0.066 mm
67 µm0.067 mm
68 µm0.068 mm
69 µm0.069 mm
70 µm0.070 mm
71 µm0.071 mm
72 µm0.072 mm
73 µm0.073 mm
74 µm0.074 mm
75 µm0.075 mm
76 µm0.076 mm
77 µm0.077 mm
78 µm0.078 mm
79 µm0.079 mm
80 µm0.080 mm
81 µm0.081 mm
82 µm0.082 mm
83 µm0.083 mm
84 µm0.084 mm
85 µm0.085 mm
86 µm0.086 mm
87 µm0.087 mm
88 µm0.088 mm
89 µm0.089 mm
90 µm0.090 mm
91 µm0.091 mm
92 µm0.092 mm
93 µm0.093 mm
94 µm0.094 mm
95 µm0.095 mm
96 µm0.096 mm
97 µm0.097 mm
98 µm0.098 mm
99 µm0.099 mm
100 µm0.100 mm
micrometers (µm)millimeters (mm)
101 µm0.101 mm
102 µm0.102 mm
103 µm0.103 mm
104 µm0.104 mm
105 µm0.105 mm
106 µm0.106 mm
107 µm0.107 mm
108 µm0.108 mm
109 µm0.109 mm
110 µm0.110 mm
111 µm0.111 mm
112 µm0.112 mm
113 µm0.113 mm
114 µm0.114 mm
115 µm0.115 mm
116 µm0.116 mm
117 µm0.117 mm
118 µm0.118 mm
119 µm0.119 mm
120 µm0.120 mm
121 µm0.121 mm
122 µm0.122 mm
123 µm0.123 mm
124 µm0.124 mm
125 µm0.125 mm
126 µm0.126 mm
127 µm0.127 mm
128 µm0.128 mm
129 µm0.129 mm
130 µm0.130 mm
131 µm0.131 mm
132 µm0.132 mm
133 µm0.133 mm
134 µm0.134 mm
135 µm0.135 mm
136 µm0.136 mm
137 µm0.137 mm
138 µm0.138 mm
139 µm0.139 mm
140 µm0.140 mm
141 µm0.141 mm
142 µm0.142 mm
143 µm0.143 mm
144 µm0.144 mm
145 µm0.145 mm
146 µm0.146 mm
147 µm0.147 mm
148 µm0.148 mm
149 µm0.149 mm
150 µm0.150 mm
151 µm0.151 mm
152 µm0.152 mm
153 µm0.153 mm
154 µm0.154 mm
155 µm0.155 mm
156 µm0.156 mm
157 µm0.157 mm
158 µm0.158 mm
159 µm0.159 mm
160 µm0.160 mm
161 µm0.161 mm
162 µm0.162 mm
163 µm0.163 mm
164 µm0.164 mm
165 µm0.165 mm
166 µm0.166 mm
167 µm0.167 mm
168 µm0.168 mm
169 µm0.169 mm
170 µm0.170 mm
171 µm0.171 mm
172 µm0.172 mm
173 µm0.173 mm
174 µm0.174 mm
175 µm0.175 mm
176 µm0.176 mm
177 µm0.177 mm
178 µm0.178 mm
179 µm0.179 mm
180 µm0.180 mm
181 µm0.181 mm
182 µm0.182 mm
183 µm0.183 mm
184 µm0.184 mm
185 µm0.185 mm
186 µm0.186 mm
187 µm0.187 mm
188 µm0.188 mm
189 µm0.189 mm
190 µm0.190 mm
191 µm0.191 mm
192 µm0.192 mm
193 µm0.193 mm
194 µm0.194 mm
195 µm0.195 mm
196 µm0.196 mm
197 µm0.197 mm
198 µm0.198 mm
199 µm0.199 mm
200 µm0.200 mm

Conversion of 1 micrometer (µm) to other units of length

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

  • 1 micrometer (µm) = 1,000 nanometers (nm)
  • 1 micrometer (µm) = 0.001 millimeter (mm)
  • 1 micrometer (µm) = 0.0001 centimeter (cm)
  • 1 micrometer (µm) = 0.00001 decimeter (dm)
  • 1 micrometer (µm) = 0.000001 meter (m)
  • 1 micrometer (µm) = 0.000000001 kilometer (km)
  • 1 micrometer (µm) = 0.000039370078740157 inch (in)
  • 1 micrometer (µm) = 0.0000032808398950131 foot (ft)
  • 1 micrometer (µm) = 0.0000010936132983377 yard (yd)
  • 1 micrometer (µm) = 0.00000000062137119223733 mile (mi)
  • 1 micrometer (µm) = 0.00000000053995680345572 nautical mile (nmi)

What is a micrometer (µm)?

Definition of micrometer: A micrometer, also known as a micron, is a unit of length in the International System of Units (SI). It is equal to one millionth of a meter (10^-6 m). It is frequently used in scientific and industrial applications to measure very small distances such as cells, bacteria, and fine particles.

The term “micrometer” (µm) is the technically correct and preferred term according to the International System of Units (SI). But the term “micron” is more commonly used in everyday usage.

The abbreviation for micrometer is μm. The single Unicode character ㎛ (U+339B) represents the 2-character Greek/Latin abbreviation for micrometer. The Windows Alt code for this character ㎛ is Alt + 13211.

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.