Metric-English-Decimal Chart
DRILL SIZE CHART

MetricEnglishDecimal
1mm 0.03937
 3/64.0469
 1/160.0625
 5/64.0781
2mm 0.07874
 3/320.0937
 7/640.1094
3mm 0.11811
 1/80.1250
 9/640.1406
 5/320.1562
4mm 0.15748
 11/640.1719
 3/160.1875
5mm 0.19685
 13/640.2031
 7/320.2187
 15/640.2344
6mm 0.23622
 1/40.2500
7mm 0.27559
 9/320.2812
MetricEnglishDecimal
 5/160.3125
8mm 0.31496
 11/320.3437
9mm 0.35433
 3/80.3750
10mm 0.39370
 13/320.4062
11mm 0.43307
 7/160.4375
 15/320.4687
12mm 0.47244
 1/20.5000
13mm 0.51181
14mm 0.55118
 9/160.5625
15mm 0.59055
 5/80.6250
16mm 0.62992
17mm 0.66929
 11/160.6875
18mm 0.70866
19mm 0.74803
MetricEnglishDecimal
 3/40.7500
20mm 0.78740
 13/160.8125
21mm 0.82677
22mm 0.86614
 7/80.8750
23mm 0.90551
 15/160.9375
24mm 0.94488
25mm 0.98425
 1 inch1.0000
26mm 1.02362
 1-1/161.0625
27mm 1.06299
28mm 1.10236
 1-1/81.125
29mm 1.14173
30mm 1.1811
 1-3/161.1875
31mm 1.22047
 1-1/41.250
32mm 1.25984