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Length converter

Millimeters to Micrometers (mm to µm)

Type in either box: it converts both ways, accepts sums like 12*3, and shows every other length unit too.

1 mm = 1,000 µm. To convert millimeters to micrometers, multiply the value in millimeters by 1,000.

How to convert millimeters to micrometers

To convert millimeters (mm) to micrometers (µm), multiply the value in millimeters by 1,000.

µm = mm × 1,000

Example: 10 mm = 10,000 µm.

You can also type 10 mm to µm into the smart calculator, or mix units: 1 mm + 1 µm.

Millimeters to Micrometers conversion table

Millimeters to Micrometers
MillimetersMicrometers
0.01 mm10 µm
0.1 mm100 µm
0.25 mm250 µm
0.5 mm500 µm
1 mm1,000 µm
2 mm2,000 µm
3 mm3,000 µm
4 mm4,000 µm
5 mm5,000 µm
6 mm6,000 µm
7 mm7,000 µm
8 mm8,000 µm
9 mm9,000 µm
10 mm10,000 µm
12 mm12,000 µm
15 mm15,000 µm
20 mm20,000 µm
25 mm25,000 µm
30 mm30,000 µm
40 mm40,000 µm
50 mm50,000 µm
60 mm60,000 µm
75 mm75,000 µm
100 mm100,000 µm
250 mm250,000 µm
500 mm500,000 µm
1,000 mm1,000,000 µm

Converting micrometers back to millimeters

1 µm = 0.001 mm. See the Micrometers to Millimeters converter, or press the swap button above.

About the units

Millimeter (mm)

One thousandth of a meter. Ten millimeters make a centimeter.

Micrometer (µm)

One millionth of a meter, also called a micron.

Length measures distance in one dimension. The SI base unit is the meter, defined by the distance light travels in a vacuum in 1/299,792,458 of a second. Since the 1959 international yard and pound agreement, imperial and US customary lengths are defined exactly in meters: an inch is exactly 2.54 centimeters.

Questions and answers

How many micrometers are in a millimeter?

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

How do I convert millimeters to micrometers?

To convert millimeters to micrometers, multiply the value in millimeters by 1,000. The formula is µm = mm × 1,000. For example, 10 mm = 10,000 µm.

What is 10 mm in µm?

10 millimeters is 10,000 micrometers.

Which is bigger, a millimeter or a micrometer?

A millimeter is bigger: 1 mm = 1,000 µm.

How many centimeters are in a foot?

A foot is exactly 30.48 centimeters, because an inch is defined as exactly 2.54 cm and a foot is 12 inches.

Does this mm to µm converter work offline?

Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.