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Conversion Charts

Welcome to the Eternal Tools Conversion charts page. Scroll down the list to find your helpful chart.  We have Diamond grit versus Micron versus mesh conversions and Fractions, Inches and millimetre conversion charts. If there's a conversion you can't find, drop us a line, we'd love to hear from you. 

Fraction/Decimal to Millimetre (mm) Conversion Chart


Fraction
Decimal
mm
Fraction
Decimal
mm
Fraction
Decimal
mm
1/64
0.0156
0.3969
23/64
0.3594
9.1281
45/64
0.7031
17.8594
1/32
0.0313
0.7983
3/8
0.3750
9.5250
23/32
0.7188
18.2563
3/64
0.0469
1.1906
25/64
0.3906
9.9219
47/64
0.7344
18.6532
1/16
0.0625
1.5875
13/32
0.4063
10.3188
3/4
0.7500
19.0500
5/64
0.0781
1.9844
27/64
0.4219
10.7157
49/64
0.7656
19.4469
3/32
0.0938
2.3813
7/16
0.4375
11.1125
25/32
0.7813
19.8438
7/64
0.1094
2.7781
29/64
0.4531
11.5094
51/64
0.7969
20.2407
1/8
0.1250
3.1750
15/32
0.4688
11.9063
13/16
0.8125
20.6375
9/64
0.1406
3.5719
31/64
0.4844
12.3032
53/64
0.8281
21.0344
5/32
0.1563
2.3813
1/2
0.5000
12.7000
27/32
0.8438
21.4313
11/64
0.1719
4.3656
33/64
0.5156
13.0969
55/64
0.8594
21.8282
3/16
0.1875
4.7625
17/32
0.5313
13.4938
7/8
0.8750
22.2250
13/64
0.2031
5.1594
35/64
0.5469
13.8907
57/64
0.8906
22.6219
7/32
0.2188
5.5563
9/16
0.5625
14.2875
29/32
0.9063
23.0188
15/64
0.2344
5.9531
37/64
0.5781
14.6844
59/64
0.9219
23.4157
1/4
0.2500
6.3500
19/32
0.5938
15.0813
15/16
0.9375
23.8126
17/64
0.2656
6.7469
39/64
0.6094
15.4782
61/64
0.9531
24.2094
9/32
0.2813
7.1438
5/8
0.6250
15.8750
31/32
0.9688
24.6063
19/64
0.2969
7.5406
41/64
0.6406
16.2719
63/64
0.9844
25.0032
5/16
0.3125
7.9375
21/32
0.6563
16.6688
1
1.000
25.4001
21/64
0.3281
8.3344
43/64
0.6719
17.0657



11/32
0.3438
8.7313
11/16
0.6875
17.4625












Millimetre (mm) to Decimal (Inches) size 1mm and up


mm
Inches
mm
Inches
mm
Inches
1
0.0394
14
0.5512
32
1.2598
2
0.0787
16
0.6299
35
1.378
3
0.1181
18
0.7087
38
1.4961
4
0.1575
20
0.7874
40
1.5748
5
0.1969
22
0.8661
42
1.6535
6
0.2362
24
0.9449
45
1.7717
7
0.2756
26
1.0236
50
1.9685
8
0.315
28
1.1024
55
2.1654
10
0.3937
30
1.1811
60
2.3622
12
0.4724
31
1.2205


Millimetre (mm) to Decimal (Inches) size 0.1mm and up


mm
Inches
mm
Inches
mm
Inches
0.1
0.00394
1.10
0.04331
2.10
0.08268
0.2
0.00787
1.20
0.04724
2.20
0.08661
0.3
0.01181
1.30
0.05118
2.30
0.09055
0.4
0.01575
1.40
0.05511
2.40
0.09449
0.5
0.01969
1.50
0.05906
2.50
0.09843
0.6
0.02362
1.60
0.06299
2.60
0.1024
0.7
0.02756
1.70
0.06693
2.70
0.1063
0.8
0.0315
1.80
0.07087
2.80
0.1102
0.9
0.03543
1.90
0.07480
2.90
0.1142
1.00
0.03937
2.00
0.07874
3.00
0.11811

Micron, Grit & Mesh Conversion Chart

Diamond Paste, Aluminium Oxide and Cerium Oxide are measured in Microns.


Micron
Grit
Mesh
0.25
100,000
0-0.5
1
14,000
0-2
3
8,000
2-4
4
5000
2-6
5
4,500
4-6
7
2,800
5-10
9
1,800
6-12
14
1,400
8-20
25
800
20-30
45
325
40-50
90
225
80-100



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