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Decimal
Conversion Chart (Metric)
Inch Equivalents of Standard
Millimeter Drill Sizes
For Inch
Chart CLICK
HERE
| mm Size |
Dec Equiv |
mm Size |
Dec Equiv |
mm Size |
Dec Equiv |
mm Size |
Dec Equiv |
mm Size |
Dec Equiv |
mm Size |
Dec Equiv |
| .35 |
.0138 |
1.95 |
.0768 |
4.30 |
.1693 |
7.25 |
.2855 |
10.50 |
.4134 |
27.00 |
1.0630 |
| .38 |
.0150 |
2.00 |
.0787 |
4.40 |
.1732 |
7.30 |
.2874 |
10.80 |
.4252 |
28.00 |
1.1024 |
| .40 |
.0157 |
2.05 |
.0807 |
4.50 |
.1772 |
7.40 |
.2913 |
11.00 |
.4331 |
29.00 |
1.1417 |
| .42 |
.0165 |
2.10 |
.0827 |
4.60 |
.1811 |
7.50 |
.2953 |
11.20 |
.4409 |
30.00 |
1.1811 |
| .45 |
.0177 |
2.15 |
.0846 |
4.70 |
.1850 |
7.60 |
.2992 |
11.50 |
.4528 |
31.00 |
1.2205 |
| .48 |
.0189 |
2.20 |
.0866 |
4.75 |
.1870 |
7.70 |
.3031 |
11.80 |
.4646 |
32.00 |
1.2598 |
| .50 |
.0197 |
2.25 |
.0886 |
4.80 |
.1890 |
7.75 |
.3051 |
12.00 |
.4724 |
33.00 |
1.2992 |
| .55 |
.0217 |
2.30 |
.0905 |
4.90 |
.1929 |
7.80 |
.3071 |
12.20 |
.4803 |
34.00 |
1.3386 |
| .60 |
.0236 |
2.35 |
.0925 |
5.00 |
.1968 |
7.90 |
.3110 |
12.50 |
.4921 |
35.00 |
1.3780 |
| .65 |
.0256 |
2.40 |
.0945 |
5.10 |
.2008 |
8.00 |
.3150 |
13.00 |
.5118 |
36.00 |
1.4173 |
| .70 |
.0276 |
2.45 |
.0965 |
5.20 |
.2047 |
8.10 |
.3189 |
13.50 |
.5315 |
37.00 |
1.4567 |
| .75 |
.0295 |
2.50 |
.0984 |
5.25 |
.2067 |
8.20 |
.3228 |
14.00 |
.5512 |
38.00 |
1.4961 |
| .80 |
.0315 |
2.55 |
.1004 |
5.30 |
.2087 |
8.25 |
.3248 |
14.50 |
.5709 |
39.00 |
1.5354 |
| .85 |
.0335 |
2.60 |
.1024 |
5.40 |
.2126 |
8.30 |
.3268 |
15.00 |
.5906 |
40.00 |
1.5748 |
| .90 |
.0354 |
2.65 |
.1043 |
5.50 |
.2165 |
8.40 |
.3307 |
15.50 |
.6102 |
41.00 |
1.6142 |
| .95 |
.0374 |
2.70 |
.1063 |
5.60 |
.2205 |
8.50 |
.3346 |
16.00 |
.6299 |
42.00 |
1.6535 |
| 1.00 |
.0394 |
2.75 |
.1083 |
5.70 |
.2244 |
8.60 |
.3386 |
16.50 |
.6496 |
43.00 |
1.6929 |
| 1.05 |
.0413 |
2.80 |
.1102 |
5.75 |
.2264 |
8.70 |
.3425 |
17.00 |
.6693 |
44.00 |
1.7323 |
| 1.10 |
.0433 |
2.90 |
.1142 |
5.80 |
.2283 |
8.75 |
.3445 |
17.50 |
.6890 |
45.00 |
1.7717 |
| 1.15 |
.0453 |
3.00 |
.1181 |
5.90 |
.2323 |
8.80 |
.3465 |
18.00 |
.7087 |
46.00 |
1.8110 |
| 1.20 |
.0472 |
3.10 |
.1220 |
6.00 |
.2362 |
8.90 |
.3504 |
18.50 |
.7283 |
47.00 |
1.8504 |
| 1.25 |
.0492 |
3.20 |
.1260 |
6.10 |
.2401 |
9.00 |
.3543 |
19.00 |
.7480 |
48.00 |
1.8898 |
| 1.30 |
.0512 |
3.25 |
.1280 |
6.20 |
.2441 |
9.10 |
.3583 |
19.50 |
.7677 |
49.00 |
1.9291 |
| 1.35 |
.0531 |
3.30 |
.1299 |
6.25 |
.2461 |
9.20 |
.3622 |
20.00 |
.7874 |
50.00 |
1.9685 |
| 1.40 |
.0551 |
3.40 |
.1339 |
6.30 |
.2480 |
9.25 |
.3642 |
20.50 |
.8071 |
55.00 |
2.1654 |
| 1.45 |
.0571 |
3.50 |
.1378 |
6.40 |
.2520 |
9.30 |
.3661 |
21.00 |
.8268 |
60.00 |
2.3622 |
| 1.50 |
.0591 |
3.60 |
.1417 |
6.50 |
.2559 |
9.40 |
.3701 |
21.50 |
.8465 |
65.00 |
2.5591 |
| 1.55 |
.0610 |
3.70 |
.1457 |
6.60 |
.2598 |
9.50 |
.3740 |
22.00 |
.8661 |
70.00 |
2.7559 |
| 1.60 |
.0629 |
3.75 |
.1477 |
6.700 |
.2638 |
9.60 |
.3780 |
22.50 |
.8858 |
75.00 |
2.9528 |
| 1.65 |
.0650 |
3.80 |
.1496 |
6.75 |
.2658 |
9.70 |
.3819 |
23.00 |
.9055 |
80.00 |
3.1496 |
| 1.70 |
.0669 |
3.90 |
.1535 |
6.80 |
.2677 |
9.75 |
.3539 |
23.50 |
.9252 |
85.00 |
3.3465 |
| 1.75 |
.0689 |
4.00 |
.1575 |
6.90 |
.2716 |
9.80 |
.3858 |
24.00 |
.9449 |
90.00 |
3.5433 |
| 1.80 |
.0709 |
4.10 |
.1614 |
7.00 |
.2756 |
9.90 |
.3898 |
24.50 |
.9646 |
95.00 |
3.7402 |
| 1.85 |
.0728 |
4.20 |
.1654 |
7.10 |
.2795 |
10.00 |
.3937 |
25.00 |
.9843 |
100.00 |
3.9370 |
| 1.90 |
.0748 |
4.25 |
.1674 |
7.20 |
.2835 |
10.20 |
.4016 |
26.00 |
1.0236 |
105.00 |
4.1339 |
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