Millimeters to micrometers

micrometers = millimeters × 1,000

How to convert millimeters to micrometers

One millimeter is 1,000 micrometers, so multiply the number of millimeters by 1,000. For example, 20 millimeters is 20 × 1,000 = 20,000 micrometers. To go back, divide by the same number, or multiply by 0.001.

Quick estimate

Multiplying by about 1000 gets within 0.0% of the exact answer, which is enough to check that a result makes sense.

Where it comes up

Length conversions come up in DIY and building plans, running and cycling distances, maps, clothing sizes and travel between countries that use metric and imperial units.

millimeters	micrometers
1 mm	1,000 um
2 mm	2,000 um
3 mm	3,000 um
4 mm	4,000 um
5 mm	5,000 um
6 mm	6,000 um
7 mm	7,000 um
8 mm	8,000 um
9 mm	9,000 um
10 mm	10,000 um
11 mm	11,000 um
12 mm	12,000 um
13 mm	13,000 um
14 mm	14,000 um
15 mm	15,000 um
16 mm	16,000 um
17 mm	17,000 um
18 mm	18,000 um
19 mm	19,000 um
20 mm	20,000 um
25 mm	25,000 um
30 mm	30,000 um
40 mm	40,000 um
50 mm	50,000 um
60 mm	60,000 um
70 mm	70,000 um
75 mm	75,000 um
80 mm	80,000 um
90 mm	90,000 um
100 mm	100,000 um
120 mm	120,000 um
150 mm	150,000 um
200 mm	200,000 um
250 mm	250,000 um
300 mm	300,000 um
400 mm	400,000 um
500 mm	500,000 um
750 mm	750,000 um
1,000 mm	1,000,000 um
1,500 mm	1,500,000 um
2,000 mm	2,000,000 um
5,000 mm	5,000,000 um
10,000 mm	10,000,000 um

Questions

How many micrometers are in a millimeter?

1,000 micrometers.

How do I convert millimeters to micrometers in a spreadsheet?

Put the value in A1 and type =A1*1000, then fill the formula down the column.

Are the values in the table exact?

They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.