Convert Micrometers to Millimeters

Q: How many millimeters are in a micrometer?

There are 0.001 millimeters in one micrometer.

Q: How many micrometers are in a millimeter?

There are 1,000 micrometers in one millimeter.

1 micrometer = 0.001 millimeters. Type any value below to convert in either direction — the calculation happens in your browser.

micrometers

millimeters

Micrometers to Millimeters formula

Multiply the number of micrometers by 0.001 to get millimeters.

millimeters = micrometers × 0.001

To go the other way: divide the number of millimeters by 0.001, or multiply by 1000.

micrometers = millimeters ÷ 0.001

Micrometers to Millimeters conversion table

Micrometers	Millimeters
1 µm	0.001 mm
2 µm	0.002 mm
3 µm	0.003 mm
4 µm	0.004 mm
5 µm	0.005 mm
6 µm	0.006 mm
7 µm	0.007 mm
8 µm	0.008 mm
9 µm	0.009 mm
10 µm	0.01 mm
15 µm	0.015 mm
20 µm	0.02 mm
25 µm	0.025 mm
30 µm	0.03 mm
40 µm	0.04 mm
50 µm	0.05 mm
75 µm	0.075 mm
100 µm	0.1 mm
250 µm	0.25 mm
500 µm	0.5 mm
1,000 µm	1 mm

Millimeters to Micrometers conversion table

Millimeters	Micrometers
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

About the micrometer

A micrometre, or micron, is one millionth of a metre — the scale of bacteria, fine dust and semiconductor features.

About the millimeter

A millimetre is one thousandth of a metre and is the default unit on engineering drawings and rulers.

Frequently asked questions

How many millimeters are in a micrometer?

There are 0.001 millimeters in one micrometer.

How many micrometers are in a millimeter?

There are 1,000 micrometers in one millimeter.

Is this conversion exact?

The ratio between the micrometer and the millimeter is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.

What is 10 micrometers in millimeters?

10 micrometers equals 0.01 millimeters.

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