Millimeters to Micrometers Converter

1 millimeter (mm) equals 1,000 micrometers (µm).

Quick answer

  • 1 millimeter = 1,000 micrometers
  • 1 micrometer = 0.001 millimeters
  • Formula: µm = mm × 1,000

1 millimeter = 1,000 micrometers

How to convert millimeters to micrometers

µm = mm × 1,000

To convert millimeters to micrometers, multiply the number of millimeters by 1,000.

Example: 18 mm to µm

  1. Start with the value in millimeters: 18 mm.
  2. Multiply by 1,000: 18 × 1,000 = 18,000.
  3. Result: 18 millimeters = 18,000 micrometers.

Going the other way, 1 micrometer = 0.001 millimeters, so to convert micrometers back to millimeters you divide by the same number. See micrometers to millimeters.

Millimeters to micrometers conversion table

Millimeters (mm)Micrometers (µm)
0.25 mm 250 µm
0.5 mm 500 µm
0.75 mm 750 µm
1 mm 1,000 µm
1.5 mm 1,500 µm
2 mm 2,000 µm
2.5 mm 2,500 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

More mm to µm values

What is a millimeter?

The millimeter (also spelled millimetre) is a metric unit of length equal to one thousandth of a meter, or one tenth of a centimeter.

More about millimeters →

What is a micrometer?

The micrometer (also micrometre, and commonly called the micron) is a metric unit of length equal to one millionth of a meter, or one thousandth of a millimeter.

More about micrometers →

Convert millimeters to other units

Convert other units to micrometers

Frequently asked questions

How many micrometers are in a millimeter?

One millimeter is 1,000 micrometers.

How many millimeters are in a micrometer?

One micrometer is 0.001 millimeters.

What is the formula to convert millimeters to micrometers?

µm = mm × 1,000.