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HOW TO CONVERT MM TO FRACTIONS:
Step 1.
Measure or identify the length in mm for the object of interest.
Step 2.
Divide the amount in Step 1 by 25.4 to get the inches in decimal form.
Step 3.
Take the decimal portion of the result of Step 2 and multiply it by 16.
The point is to determine the nearest 16th of an inch on a ruler.
For example: 120mm divided by 25.4 equals 4.7244 inches. Multiply the 0.7244 by 16 equals 11.591.
Round this to 12/16 or 3/4. The result therefore is 4-3/4"
1 mm = .03937 inches
1 inch = 25.4 mm
1 meter = 3.2809 feet
1 kg = 2.2 lbs.
MEASUREMENT CROSS REFERENCE
Fraction
Inch
Millimeter
Fraction
Inch
Millimeter
1/64
.0156
.3968
33/64
.5156
13.097
1/32
.0312
.7937
17/32
.5312
13.494
3/64
.0468
1.191
35/64
.5468
13.891
1/16
.0625
1.588
9/16
.5625
14.288
5/64
.0781
1.984
37/64
.5781
14.684
3/32
.0937
2.381
19/32
.5937
15.081
7/64
.1093
2.778
39/64
.6093
15.478
1/8
.125
3.175
5/8
.625
15.875
9/64
.1406
3.572
41/64
.6406
16.272
5/32
.1562
3.969
21/32
.6562
16.669
11/64
.1718
4.366
43/64
.6718
17.066
3/16
.1875
4.763
11/16
.6875
17.463
13/64
.2031
5.159
45/64
.7031
17.859
7/32
.2187
5.556
23/32
.7187
18.256
15/64
.2343
5.953
47/64
.7343
18.653
1/4
.25
6.350
3/4
.75
19.050
17/64
.2656
6.747
49/64
.7656
19.447
9/32
.2812
7.144
25/32
.7812
19.844
19/64
.2968
7.541
51/64
.7968
20.241
5/16
.3125
7.938
13/16
.8125
20.638
21/64
.3281
8.334
53/64
.8281
21.034
11/32
.3437
8.731
27/32
.8437
21.431
23/64
.3593
9.128
55/64
.8593
21.828
3/8
.375
9.525
7/8
.875
22.225
25/64
.3906
9.921
57/64
.8906
22.622
13/32
.4062
10.319
29/32
.9062
23.019
27/64
.4218
10.715
59/64
.9218
23.416
7/16
.4375
11.113
15/16
.9375
23.813
29/64
.4531
11.509
61/64
.9531
24.209
15/32
.4687
11.906
31/32
.9687
24.606
31/64
.4844
12.303
63/64
.9843
25.003
1/2
.5
12.700
1
1
25.400
Millimeter to Inch Equivalents
250
9-7/8
500
19-11/16
270
10-5/8
510
20-1/16
300
11-13/16
512
20-1/8
350
13-3/4
550
21-5/8
400
15-3/4
570
22-7/16
418
16-7/16
582
22-15/16
430
16-15/16
600
23-5/8
440
17-5/16
650
25
450
17-3/4
700
27-9/16
470
18-1/2
750
29-9/16
Millimeter to Inch Equivalents
1
1/32
13.5
17/32
1.5
1/16
14
9/16
2
3/32
15
19/32
3
1/8
16
5/8
4
5/32
17
21/32
5
3/16
17.5
11/16
5.5
7/32
18
23/32
6
1/4
19
3/4
7
9/32
20
25/32
8
5/16
20.5
13/16
9
11/32
21
27/32
9.5
3/8
22
7/8
10
13/32
23
29/32
11
7/16
24
15/16
12
15/32
24.5
31/32
13
1/2
25.4
1