This length unit converter dynamically calculates a value you enter in millimeters (mm) and converts it to its equivalent value in micrometers (µm). A micrometer is also known as a micron.
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
➞ browse complete list of length unit converters
➞ go to Unit Converters & Calculators homepage
How many millimeters (mm) are in a micrometer (µm)? What is the formula for how to convert millimeters to micrometers (mm to µm)?
1 millimeter (mm) = 1,000 micrometers (µm)
So we can say that there is 1,000 micrometers 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 micrometer unit of measurement is 1,000.
Inversely (or reciprocally),
1 micrometer (µm) = 0.001 millimeter (mm)
So we can say that there is 0.001 millimeter in 1 micrometer.
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 micrometer unit of measurement is 0.001.
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 micrometers (mm to µm). Both formulas will yield the same result. The formulas are:
µm = mm × 1,000 → This is the formula based on the multiplication conversion factor.
and
µm = mm ÷ 0.001 → This is the formula based on the division conversion factor.
For example, if you have a length of 80 millimeters that you want to convert to micrometers, you would use either of the two formulas as follows:
µm = 80 mm × 1,000 = 80,000 µm
µm = 80 mm ÷ 0.001 = 80,000 µm
So, the result is the same using either formula, which is 80,000 micrometers.
Millimeters to micrometers (mm to µm) 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 micrometers is needed, here is a millimeters-to-micrometers 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 micrometers. These equivalent measurement values may be rounded off to 1 or 2 decimal places when it is mathematically expedient for everyday applications.
| millimeters (mm) | micrometers (µm) |
| 1 mm | 1,000 µm |
| 2 mm | 2,000 µm |
| 3 mm | 3,000 µm |
| 4 mm | 4,000 µm |
| 5 mm | 5,000 µm |
| 6 mm | 6,000 µm |
| 7 mm | 7,000 µm |
| 8 mm | 8,000 µm |
| 9 mm | 9,000 µm |
| 10 mm | 10,000 µm |
| 11 mm | 11,000 µm |
| 12 mm | 12,000 µm |
| 13 mm | 13,000 µm |
| 14 mm | 14,000 µm |
| 15 mm | 15,000 µm |
| 16 mm | 16,000 µm |
| 17 mm | 17,000 µm |
| 18 mm | 18,000 µm |
| 19 mm | 19,000 µm |
| 20 mm | 20,000 µm |
| 21 mm | 21,000 µm |
| 22 mm | 22,000 µm |
| 23 mm | 23,000 µm |
| 24 mm | 24,000 µm |
| 25 mm | 25,000 µm |
| 26 mm | 26,000 µm |
| 27 mm | 27,000 µm |
| 28 mm | 28,000 µm |
| 29 mm | 29,000 µm |
| 30 mm | 30,000 µm |
| 31 mm | 31,000 µm |
| 32 mm | 32,000 µm |
| 33 mm | 33,000 µm |
| 34 mm | 34,000 µm |
| 35 mm | 35,000 µm |
| 36 mm | 36,000 µm |
| 37 mm | 37,000 µm |
| 38 mm | 38,000 µm |
| 39 mm | 39,000 µm |
| 40 mm | 40,000 µm |
| 41 mm | 41,000 µm |
| 42 mm | 42,000 µm |
| 43 mm | 43,000 µm |
| 44 mm | 44,000 µm |
| 45 mm | 45,000 µm |
| 46 mm | 46,000 µm |
| 47 mm | 47,000 µm |
| 48 mm | 48,000 µm |
| 49 mm | 49,000 µm |
| 50 mm | 50,000 µm |
| 51 mm | 51,000 µm |
| 52 mm | 52,000 µm |
| 53 mm | 53,000 µm |
| 54 mm | 54,000 µm |
| 55 mm | 55,000 µm |
| 56 mm | 56,000 µm |
| 57 mm | 57,000 µm |
| 58 mm | 58,000 µm |
| 59 mm | 59,000 µm |
| 60 mm | 60,000 µm |
| 61 mm | 61,000 µm |
| 62 mm | 62,000 µm |
| 63 mm | 63,000 µm |
| 64 mm | 64,000 µm |
| 65 mm | 65,000 µm |
| 66 mm | 66,000 µm |
| 67 mm | 67,000 µm |
| 68 mm | 68,000 µm |
| 69 mm | 69,000 µm |
| 70 mm | 70,000 µm |
| 71 mm | 71,000 µm |
| 72 mm | 72,000 µm |
| 73 mm | 73,000 µm |
| 74 mm | 74,000 µm |
| 75 mm | 75,000 µm |
| 76 mm | 76,000 µm |
| 77 mm | 77,000 µm |
| 78 mm | 78,000 µm |
| 79 mm | 79,000 µm |
| 80 mm | 80,000 µm |
| 81 mm | 81,000 µm |
| 82 mm | 82,000 µm |
| 83 mm | 83,000 µm |
| 84 mm | 84,000 µm |
| 85 mm | 85,000 µm |
| 86 mm | 86,000 µm |
| 87 mm | 87,000 µm |
| 88 mm | 88,000 µm |
| 89 mm | 89,000 µm |
| 90 mm | 90,000 µm |
| 91 mm | 91,000 µm |
| 92 mm | 92,000 µm |
| 93 mm | 93,000 µm |
| 94 mm | 94,000 µm |
| 95 mm | 95,000 µm |
| 96 mm | 96,000 µm |
| 97 mm | 97,000 µm |
| 98 mm | 98,000 µm |
| 99 mm | 99,000 µm |
| 100 mm | 100,000 µm |
| millimeters (mm) | micrometers (µm) |
| 101 mm | 101,000 µm |
| 102 mm | 102,000 µm |
| 103 mm | 103,000 µm |
| 104 mm | 104,000 µm |
| 105 mm | 105,000 µm |
| 106 mm | 106,000 µm |
| 107 mm | 107,000 µm |
| 108 mm | 108,000 µm |
| 109 mm | 109,000 µm |
| 110 mm | 110,000 µm |
| 111 mm | 111,000 µm |
| 112 mm | 112,000 µm |
| 113 mm | 113,000 µm |
| 114 mm | 114,000 µm |
| 115 mm | 115,000 µm |
| 116 mm | 116,000 µm |
| 117 mm | 117,000 µm |
| 118 mm | 118,000 µm |
| 119 mm | 119,000 µm |
| 120 mm | 120,000 µm |
| 121 mm | 121,000 µm |
| 122 mm | 122,000 µm |
| 123 mm | 123,000 µm |
| 124 mm | 124,000 µm |
| 125 mm | 125,000 µm |
| 126 mm | 126,000 µm |
| 127 mm | 127,000 µm |
| 128 mm | 128,000 µm |
| 129 mm | 129,000 µm |
| 130 mm | 130,000 µm |
| 131 mm | 131,000 µm |
| 132 mm | 132,000 µm |
| 133 mm | 133,000 µm |
| 134 mm | 134,000 µm |
| 135 mm | 135,000 µm |
| 136 mm | 136,000 µm |
| 137 mm | 137,000 µm |
| 138 mm | 138,000 µm |
| 139 mm | 139,000 µm |
| 140 mm | 140,000 µm |
| 141 mm | 141,000 µm |
| 142 mm | 142,000 µm |
| 143 mm | 143,000 µm |
| 144 mm | 144,000 µm |
| 145 mm | 145,000 µm |
| 146 mm | 146,000 µm |
| 147 mm | 147,000 µm |
| 148 mm | 148,000 µm |
| 149 mm | 149,000 µm |
| 150 mm | 150,000 µm |
| 151 mm | 151,000 µm |
| 152 mm | 152,000 µm |
| 153 mm | 153,000 µm |
| 154 mm | 154,000 µm |
| 155 mm | 155,000 µm |
| 156 mm | 156,000 µm |
| 157 mm | 157,000 µm |
| 158 mm | 158,000 µm |
| 159 mm | 159,000 µm |
| 160 mm | 160,000 µm |
| 161 mm | 161,000 µm |
| 162 mm | 162,000 µm |
| 163 mm | 163,000 µm |
| 164 mm | 164,000 µm |
| 165 mm | 165,000 µm |
| 166 mm | 166,000 µm |
| 167 mm | 167,000 µm |
| 168 mm | 168,000 µm |
| 169 mm | 169,000 µm |
| 170 mm | 170,000 µm |
| 171 mm | 171,000 µm |
| 172 mm | 172,000 µm |
| 173 mm | 173,000 µm |
| 174 mm | 174,000 µm |
| 175 mm | 175,000 µm |
| 176 mm | 176,000 µm |
| 177 mm | 177,000 µm |
| 178 mm | 178,000 µm |
| 179 mm | 179,000 µm |
| 180 mm | 180,000 µm |
| 181 mm | 181,000 µm |
| 182 mm | 182,000 µm |
| 183 mm | 183,000 µm |
| 184 mm | 184,000 µm |
| 185 mm | 185,000 µm |
| 186 mm | 186,000 µm |
| 187 mm | 187,000 µm |
| 188 mm | 188,000 µm |
| 189 mm | 189,000 µm |
| 190 mm | 190,000 µm |
| 191 mm | 191,000 µm |
| 192 mm | 192,000 µm |
| 193 mm | 193,000 µm |
| 194 mm | 194,000 µm |
| 195 mm | 195,000 µm |
| 196 mm | 196,000 µm |
| 197 mm | 197,000 µm |
| 198 mm | 198,000 µm |
| 199 mm | 199,000 µm |
| 200 mm | 200,000 µm |
Conversion of 1 millimeter (mm) 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 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.
