FASTENERS Inch Bolts & Screws 1
REFERENCE CHART — INCH & METRIC CONVERSION
Fractional to Decimal to Millimeter
Millimeter to Inch
FRACTIONS
DECIMAL
MILLIMETERS mm INCHES
mm INCHES mm INCHES
FRACTIONS
DECIMAL
MILLIMETERS
1 64
33 64
1.515625 — 13.097
.1 — .0039 .2 — .0079 .3 — .0118 .4 — .0157 .5 — .0197 .6 — .0236 .7 — .0276 .8 — .0315 .9 — .0354 1 — .0394 2 — .0787 3 — .1181 4 — .1575 5 — .1969 6 — .2362 7 — .2756 8 — .3150 9 — .3543 10— .3937 11— .4331 12— .4724 13— .5118 14— .5512 15— .5906 16— .6299 17— .6693 18— .7087 19— .7480 20— .7874 21— .8268 22— .8661 23— .9055 24— .9449 25— .9843 26— 1.0236 27— 1.0630 28— 1.1024 29— 1.1417 30— 1.1811 31— 1.2205 32— 1.2598 33— 1.2992 34— 1.3386
35— 1.3780 36— 1.4173 37— 1.4567 38— 1.4961 39— 1.5354 40— 1.5748 41— 1.6142 42— 1.6535 43— 1.6929 44— 1.7323 45— 1.7717 46— 1.8110 47— 1.8504 48— 1.8898 49— 1.9291 50— 1.9685 51— 2.0079 52— 2.0472 53— 2.0866 54— 2.1260 55— 2.1654 56— 2.2047 57— 2.2441 58— 2.2835 59— 2.3228 60— 2.3622 61— 2.4016 62— 2.4409 63— 2.4803 64— 2.5197 65— 2.5591 66— 2.5984 67— 2.6378 68— 2.6772 69— 2.7165 70— 2.7559 71— 2.7953 72— 2.8346 73— 2.8740 74— 2.9134 75— 2.9528 76— 2.9921 77— 3.0315
78— 3.0709 79— 3.1102 80— 3.1496 81— 3.1890 82— 3.2283 83— 3.2677 84— 3.3071 85— 3.3465 86— 3.3858 87— 3.4252 88— 3.4646 89— 3.5039 90— 3.5433 91— 3.5827 92— 3.6220 93— 3.6614 94— 3.7008 95— 3.7402 96— 3.7795 97— 3.8189 98— 3.8583 99— 3.8976 100— 3.9370
0.015625 — 0.397
1
17 32
1 32
.53125
— 13.494
.03125
— 0.794
35 64
3 64
.546875 — 13.891
.046875 — 1.191
9 16
1 16
.5625
— 14.288
.0625
— 1.588
37 64
5 64
.578125 — 14.684
.078125 — 1.984
3 32
19 32
.59375
— 15.081
.09375
— 2.381
39 64
7 64
.609375 — 15.478
.109375 — 2.778
1 8
5 8
.6250
— 15.875
.1250
— 3.175
41 64
9 64
.640625 — 16.272
.140625 — 3.572
5 32
21 32
.65625
— 16.669
.15625
— 3.969
43 64
11 64
.671875 — 17.066
.171875 — 4.366
11 16
3 16
.6875
— 17.463
.1875
— 4.763
45 64
13 64
.703125 — 17.859
.203125 — 5.159
23 32
7 32
.71875
— 18.256
.21875
— 5.556
47 64
15 64
.734375 — 18.653
.234375 — 5.953
3 4
1 4
.7500
— 19.050
.2500
— 6.350
49 64
17 64
.765625 — 19.447
.265625 — 6.747
25 32
9 32
.78125
— 19.844
.28125
— 7.144
51 64
19 64
.796875 — 20.241
.296875 — 7.541
13 16
5 16
.8125
— 20.638
.3125
— 7.938
53 64
21 64
.828125 — 21.034
.328125 — 8.334
27 32
11 32
.84375
— 21.431
.34375
— 8.731
55 64
23 64
.859375 — 21.828
.359375 — 9.128
7 8
3 8
.8750
— 22.225
.3750
— 9.525
57 64
25 64
.890625 — 22.622
.390625 — 9.922
29 32
13 32
.90625
— 23.019
.40625
— 10.319
59 64
27 64
.921875 — 23.416
.421875 — 10.716
15 16
7 16
.9375
— 23.813
.4375
— 11.113
61 64
29 64
.953125 — 24.209
.453125 — 11.509
31 32
15 32
.96875
— 24.606
.46875
— 11.906
63 64
31 64
.984375 — 25.003
.484375 — 12.303
1 2
1
1.000
— 25.400
.5000
— 12.700
1 mm = .03937"
.001" = .0254mm
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