Particle Size Conversion Chart - ANSI

to compare millimeters, microns and inches to sieve sizes and ANSI grit sizes

Millimeters

Microns

Inches

ASTM Sieve

Tyler Sieve

*ANSI Table 2

*ANSI Table 3

5.6

5600

0.22

3 1/2

3 1/2

S-S

-

4.75

4750

0.187

4

4

4

-

4

4000

0.157

5

5

5

-

3.35

3350

0.132

6

6

6

-

2.8

2800

0.11

7

7

7

-

2.36

2360

0.093

8

8

8

-

2

2000

0.079

10

9

10

-

1.7

1700

0.067

12

10

12

-

1.4

1400

0.055

14

12

14

-

1.18

1180

0.046

16

14

16

16

1

1000

0.039

18

16

20

20

0.85

850

0.033

20

20

22

24

0.71

710

0.028

25

24

24

-

0.6

600

0.024

30

28

30

30

0.5

500

0.02

35

32

36

36

0.425

425

0.018

40

35

40

-

0.355

355

0.014

45

42

46

46

0.3

300

0.012

50

48

54

54

0.25

250

0.01

60

60

60

60

0.212

212

0.008

70

65

70

70

0.18

180

0.007

80

80

80

80

0.15

150

0.006

100

100

90

90

0.125

125

0.005

120

115

100

100

0.106

106

0.004

140

150

120

120

 

Micro Grits

Millimeters

Microns

Inches

D3% Max

D50 +/-

D94% Min

ANSI Grit Size

0.0500

50

0.00200

74-80

47-53

26-32

240

0.0395

39.5

0.00156

67-72

37-42

20-25

280

0.0295

29.5

0.00116

55-60

27-32

15-19

320

0.0230

23

0.00091

38-42

21-25

10.5-14.5

360

0.0183

18.3

0.00072

31.5-35.0

16.5-20

7.5-10.5

400

0.0139

13.9

0.00055

28.0-30.5

12.5-15.3

8.5-8.0

500

0.0106

10.6

0.00042

24.0-27.0

9.2-11.9

-

600

0.0077

7.8

0.00030

20.5-22.5

6.5-8.8

-

800

0.0058

5.8

0.00023

16-18

5.2-6.4

-

1000

0.0038

3.8

0.00015

13.5-15.5

2.8-4.8

-

1200

0.0450

45

0.00180

80

38-52

20

F

0.0275

27.5

0.00110

45-55

23-32

9-16.5

FF

0.0160

16

0.00063

35

12-20

5

FFF

0.0110

11

0.00043

35

11

4

FFFF

*A grit size is defined by the distribution of grits retained on a sieve set up that meets the requirements of ANSI Table 2 or 3. The numbers in the two sieve columns in this chart represent the midpoint sieve for the grading of the corresponding grit size. We've chosen to show the midpoint sieve since more material will be retained on this sieve than on any other in the sieve set up.