Micrometers (um)

Millimeters (mm)

Inches

Mils (Thousandths)

"Tenths" (Ten-Thousandths)

Millionths (Microinch)

0.1

0.0001

0.000004

0.004

0.04

3.94

0.5

0.0005

0.000020

0.020

0.20

19.69

1.0

0.0010

0.000039

0.039

0.39

39.37

1.5

0.0015

0.000059

0.059

0.59

59.06

2.0

0.0020

0.000079

0.079

0.79

78.74

2.5

0.0025

0.000098

0.098

0.98

98.43

3.0

0.0030

0.000118

0.118

1.18

118.11

3.5

0.0035

0.000138

0.138

1.38

137.80

4.0

0.0040

0.000157

0.157

1.57

157.48

4.5

0.0045

0.000177

0.177

1.77

177.17

5.0

0.0050

0.000197

0.197

1.97

196.85

5.5

0.0055

0.000217

0.217

2.17

216.54

6.0

0.0060

0.000236

0.236

2.36

236.22

7.0

0.007

0.000276

0.276

2.76

275.59

8.0

0.008

0.000315

0.315

3.15

314.96

9.0

0.009

0.000354

0.354

3.54

354.33

10.0

0.01

0.000394

0.394

393.70

12.0

0.012

0.000472

0.472

4.72

472.44

15.0

0.015

0.000591

0.591

5.91

590.55

20.0

0.02

0.000787

0.787

7.87

787.40

25.0

0.025

0.000984

0.984

9.84

984.25

25.4

0.025

0.001

1

10

1,000

50.8

0.051

0.002

2

20

2,000

76.2

0.076

0.003

3

30

3,000

101.6

0.102

0.004

4

40

4,000

127.0

0.127

0.005

5

50

5,000

152.4

0.152

0.006

6

60

6,000

177.8

0.178

0.007

7

70

7,000

203.2

0.203

0.008

8

80

8,000

228.6

0.229

0.009

9

90

9,000

254.0

0.254

0.010

10

100

10,000

304.8

0.305

0.012

12

120

12,000

381.0

0.381

0.015

15

150

15,000

508.0

0.508

0.020

20

200

20,000

635.0

0.635

0.025

25

250

25,000

inches = mm / 25.4 mm = Inches * 25.4

mils = microns / 25.4 microns = mils * 25.4

0.001 inch = 1 mils = 10 "tenths" = 1,000 microinches

0.001 mm = 1 microns = 1 micrometers = 1,000 nanometers = 10,000 Angstroms