Number and Letter Drill Sizes

Drill sizes

Every number drill #1 to #60 and letter drill A to Z, with decimal, metric, nearest equivalents, tap uses and starting RPM.

SheetIndex

BasisResearched

Checked2026-09-24

number#60 drill0.0400" / 1.02 mm number#59 drill0.0410" / 1.04 mm number#58 drill0.0420" / 1.07 mm number#57 drill0.0430" / 1.09 mm number#56 drill0.0465" / 1.18 mm number#55 drill0.0520" / 1.32 mm number#54 drill0.0550" / 1.40 mm number#53 drill0.0595" / 1.51 mm number#52 drill0.0635" / 1.61 mm number#51 drill0.0670" / 1.70 mm number#50 drill0.0700" / 1.78 mm number#49 drill0.0730" / 1.85 mm number#48 drill0.0760" / 1.93 mm number#47 drill0.0785" / 1.99 mm number#46 drill0.0810" / 2.06 mm number#45 drill0.0820" / 2.08 mm number#44 drill0.0860" / 2.18 mm number#43 drill0.0890" / 2.26 mm number#42 drill0.0935" / 2.37 mm number#41 drill0.0960" / 2.44 mm number#40 drill0.0980" / 2.49 mm number#39 drill0.0995" / 2.53 mm number#38 drill0.1015" / 2.58 mm number#37 drill0.1040" / 2.64 mm number#36 drill0.1065" / 2.71 mm number#35 drill0.1100" / 2.79 mm number#34 drill0.1110" / 2.82 mm number#33 drill0.1130" / 2.87 mm number#32 drill0.1160" / 2.95 mm number#31 drill0.1200" / 3.05 mm number#30 drill0.1285" / 3.26 mm number#29 drill0.1360" / 3.45 mm number#28 drill0.1405" / 3.57 mm number#27 drill0.1440" / 3.66 mm number#26 drill0.1470" / 3.73 mm number#25 drill0.1495" / 3.80 mm number#24 drill0.1520" / 3.86 mm number#23 drill0.1540" / 3.91 mm number#22 drill0.1570" / 3.99 mm number#21 drill0.1590" / 4.04 mm number#20 drill0.1610" / 4.09 mm number#19 drill0.1660" / 4.22 mm number#18 drill0.1695" / 4.31 mm number#17 drill0.1730" / 4.39 mm number#16 drill0.1770" / 4.50 mm number#15 drill0.1800" / 4.57 mm number#14 drill0.1820" / 4.62 mm number#13 drill0.1850" / 4.70 mm number#12 drill0.1890" / 4.80 mm number#11 drill0.1910" / 4.85 mm number#10 drill0.1935" / 4.91 mm number#9 drill0.1960" / 4.98 mm number#8 drill0.1990" / 5.05 mm number#7 drill0.2010" / 5.11 mm number#6 drill0.2040" / 5.18 mm number#5 drill0.2055" / 5.22 mm number#4 drill0.2090" / 5.31 mm number#3 drill0.2130" / 5.41 mm number#2 drill0.2210" / 5.61 mm number#1 drill0.2280" / 5.79 mm letterLetter A drill0.2340" / 5.94 mm letterLetter B drill0.2380" / 6.05 mm letterLetter C drill0.2420" / 6.15 mm letterLetter D drill0.2460" / 6.25 mm letterLetter E drill0.2500" / 6.35 mm letterLetter F drill0.2570" / 6.53 mm letterLetter G drill0.2610" / 6.63 mm letterLetter H drill0.2660" / 6.76 mm letterLetter I drill0.2720" / 6.91 mm letterLetter J drill0.2770" / 7.04 mm letterLetter K drill0.2810" / 7.14 mm letterLetter L drill0.2900" / 7.37 mm letterLetter M drill0.2950" / 7.49 mm letterLetter N drill0.3020" / 7.67 mm letterLetter O drill0.3160" / 8.03 mm letterLetter P drill0.3230" / 8.20 mm letterLetter Q drill0.3320" / 8.43 mm letterLetter R drill0.3390" / 8.61 mm letterLetter S drill0.3480" / 8.84 mm letterLetter T drill0.3580" / 9.09 mm letterLetter U drill0.3680" / 9.35 mm letterLetter V drill0.3770" / 9.58 mm letterLetter W drill0.3860" / 9.80 mm letterLetter X drill0.3970" / 10.08 mm letterLetter Y drill0.4040" / 10.26 mm letterLetter Z drill0.4130" / 10.49 mm

Popular tools

7pcs Center Drill Bits Set

$7.99View

GuardPro 60pcs Cobalt Number Size Drill Bit Set

$29.99View

GMTOOLS 29Pcs Cobalt Drill Bit Set

$39.99View

Drill America - DWD26J-SET 26 Piece High Speed Steel Drill Bit Set...

$69.62View

Cobalt Drill Bit Set - 115Pcs M35 HSS Bits

$137.97View

KnKut 115 Piece Jobber Length Drill Bit Set Numbers

$466.82View