DRILL SIZE COMPARISION CHART

The chart below gives the dimensional sizes for Fraction, number, Letter and Metric Drills with their decimal equivalent in Inches, upto 1 Inch.


FRACT SIZE# SIZELETTER SIZE METRIC SIZEDECIMAL INCHES
800.0135
790.0145
1/64 0.0156
780.0160
770.0180
0,50.0197
76 0.0200
750.0210
740.0225
730.0240
72 0.0250
710.0260
700.0280
690.0292
0,750.0295
680.0310
1/320.0312
670.0320
660.0330
650.0350
640.0360
630.0370
620.0380
610.0390
1.00.0394
60 0.0400
590.0410
580.0420
570.0430
56 0.0465
3/640.0469
1,250.0492
550.0520
54 0.0550
1,50.0591
530.0595
1/160.0625
520.0635
510.0670
1,750.0689
500.0700
490.0730
480.0760
5/640.0781
47 0.0785
20.0787
460.0810
450.0820
44 0.0860
2,250.0886
430.0890
420.0935
3/32 0.0938
410.0960
400.0980
2,50.0984
390.0995
380.1015
370.1040
360.1065
2,750.1083
7/640.1094
350.1100
34 0.1110
330.1130
320.1160
3.00.1181
31 0.1200
1/80.1250
3,250.1280
300.1285
290.1360
3,50.1378
280.1405
9/640.1406
270.1440
260.1470
3,750.1476
25 0.1495
240.1520
230.1540
5/320.1562
22 0.1570
40.1575
210.1590
200.1610
19 0.1660
4,250.1673
180.1695
11/640.1719
170.1730
160.1770
4,50.1772
150.1800
140.1820
130.1850
3/160.1875
12 0.1890
110.1910
100.1935
90.1960
5 0.1969
80.1990
70.2010
13/640.2031
6 0.2040
50.2055
5,250.2067
40.2090
3 0.2130
5,50.2165
7/320.2188
20.2210
5,750.2264
10.2280
A0.2340
15/640.2344
60.2362
B0.2380
C0.2420
D0.2460
6,250.2461
1/4E0.2500
6,50.2559
F 0.2570
G0.2610
17/640.2656
6,750.2657
H0.2660
I0.2720
70.2756
J0.2770
K0.2810
9/320.2812
7,250.2854
L0.2900
M0.2950
7,50.2953
19/640.2969
N0.3020
7,750.3051
5/160.3125
80.3150
O 0.3160
P0.3230
8,250.3248
21/640.3281
Q0.3320
8,50.3346
R0.3390
11/320.3438
8,750.3445
S0.3480
90.3543
T0.3580
23/640.3594
9,250.3642
U0.3680
9,5 0.3740
3/80.3750
V0.3770
9,750.3839
W 0.3860
25/640.3906
100.3937
X0.3970
Y0.4040
13/320.4063
Z0.4130
10,50.4134
27/640.4219
110.4331
7/160.4375
11,50.4528
29/640.4531
15/320.4688
120.4724
0.4844
12,50.4921
1/20.5000
130.5118
33/64 0.5156
17/320.5312
13,50.5315
35/640.5469
140.5512
9/160.5625
14,50.5709
37/64 0.5781
150.5906
19/320.5938
9/640.6094
15,50.6102
5/80.6250
160.6299
41/640.6406
16,50.6496
21/320.6562
170.6693
43/640.6719
11/160.6875
17,50.6890
45/640.7031
18 0.7087
23/320.7188
18,50.7283
47/640.7344
190.7480
3/40.7500
49/640.7656
19,50.7677
25/320.7813
200.7874
51/640.7969
20,5 0.8071
13/160.8125
210.8268
53/640.8281
27/32 0.8438
21,50.8465
55/640.8594
220.8661
7/80.8750
22,50.8858
57/640.8906
230.9055
29/320.9062
59/640.9219
23,50.9252
15/16 0.9375
240.9449
61/640.9531
24,50.9646
31/32 0.9688
250.9843
63/640.9844
11.0000