Having the right drill bit sizes on hand for your certain repair or structure task is necessary for any kind of seasoned carpenter or weekend-DIY’er.

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Knowing simply what size you have to use for the hole you’re making is likewise important.

It may not it is in totally noticeable at an initial glance.

Many times, we’re just trying to discover out the different sizes obtainable if you’re working through metric size (measured in millimeters) versus traditional or empirical values (our familiar fractional customs variety).

TIP: inspect out our full drill chart below for a quick reference to find all drill size equivalents.

Finally, acquiring the appropriate size drill bit set in your greater tool “chest” will arm you for the various species of jobs you’re doing.

We’ll comment on these in information in this article.

Scroll down if you just need a quick reference using our drill chart.

How plenty of Drill little Sizes are There?

First points first. If you were to look at the most all encompassing arsenal of multi-purpose, twist-type bits, how countless drill little bit sizes would there be?

Well, if friend base your answer top top how many size feet there room in the world, then there would certainly be unlimited amount the bits!

Thankfully, we deserve to narrow it under a little bit to some typical sized holes and bits.

For example, let’s look in ~ the most common applications:

Everyday house repair and also construction projects, hobby, marine, farming, woodworking, metal working, aircraft, arts and also crafts, commercial structure projects, machinery and more.

You acquire the point!

For each particular application area, you’re going to just see a couple of dozen or so relevant drill little bit sizes.

In fact, most nice sets include anywhere indigenous 12-30 piece of traditional drill little sizes. (And much an ext when you aspect in different types of bits).

Using our drill chart that complies with below, you’ll get an idea of just how numerous sizes over there are!

Types that Drill Bits

Various bit varieties exist for a wide selection of applications, and also in certain what material you’re drilling into.

For the services of simplicity, let’s look at a simple multi-purpose set.

One that can serve any of the over mentioned disciplines well.

Say, because that example, a usual 29-piece set. In the adhering to drill little chart space the usual fractional sizes this type of set would include.

This would generally use to many drill bit types, together as black color oxide, titanium, carbide, high-speed steel and also masonry (concrete), to surname a few.

Basic, twist-type drill bit sizes (fractional):

1/16″5/64″3/32″7/64″1/8″9/64″5/32″11/64″3/16″13/64″7/32″15/64″1/4″17/64″9/32″19/64″5/16″21/64″11/32″23/64″3/8″25/64″13/32″27/64″7/16″29/64″15/32″31/64″1/2″

There are undoubtedly larger sets. Specialty fasteners sometimes contact for a dimension that would certainly be thought about uncommon.

Sets with even an ext varying drill little sizes would encompass diameters smaller than 1/16″ or bigger than 1-1/2″.

In in between in these large tiny and huge sizes space every tantamount bit size known to “man”, so you always have the exact size needed depending on what you’re project is phone call for.

Here would be the traditional drill little bit sizes for spade bits (13-pieces):

1/4″, 3/8″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 7/8″, 1″, 1-1/8″, 1-1/4″, 1-3/8″ and 1-1/2″

And size for action drill bits:

Range native 1/8″ come 1-3/8″

If you require drill little sizes that are bigger than 1″, friend can often use a spade little for wood and other soft materials.

To protect against break-outs and also chipping, you have the right to stick to bigger round-shank types.

or shank bits though, you’ll usually need a

1/2; 33/64; 17/32; 35/64; 9/16; 37/64; 19/32; 39/64; 5/8; 41/64; 21/32; 43/64; 11/16; 45/64; 23/32; 47/64; 3/4; 49/64; 25/32; 51/64; 13/16; 53/64; 27/32; 55/64; 7/8; 57/64; 29/32; 59/64; 15/16; 61/64; 31/32; 63/64; 1; 1-1/8; 1-1/4; 1-3/8; 1-1/2

How carry out You know What size Drill Bits friend Need?

If you’re an typical weekend-warrior, you’ve more than likely stared in ~ a screw or bolt for a couple of moments and also wondered what dimension drill bit you would need.

Over time, you acquire so that you have the right to literally eye-ball it and also make an educated guess.

But if you’re looking in ~ a less common drill little size, you need an help to help you.

A drill bit size feet card can be an extremely helpful for this. A simple plastic drill chart sheet v perfect round holes and also markings ~ above it lets you perform a pair of things.

First, you can size screws merely by inserting them right into a feet then reading the marking.

You can additionally size drill bits by pushing them v holes.

This is especially valuable if you can’t read the engraved dimension markings ~ above the bits.

It’s likewise helpful to discover the substitute little bit size to overcome over between metric and also standard measurements.

How come Convert and Find equivalent Bit Sizes

You can use the drill chart that follows this ar to assist convert sizes, or you can do the mathematics yourself.

To do things just a little much more complicated, not all drill little bit sizes room in north American fractional measurements.

The metric mechanism is provided to specify metric drill bit sizes as well.

If you have this set, or should match, just use a straightforward formula to transform from metric come fractional inches, and also vice versa:

Converting native millimeters right into inches: Multiply by 0.039Converting from inches to millimeters: Multiply by 25.4

Matching Screw Sizes

If you’re curious what size drill little bit you’ll need for a details screw, use the complying with drill little size chart:

Screw Size

#1#2#3#4#5#6#7#8#9#10#11#12

Hole to clean screw

Drill bit Size Gauge

Even far better is to gain yourself a drill bit gauge.

These handy cards can aid you in a pinch, and can aid you to easily identify i beg your pardon size little bit you’ll need based on the screw or hole dimension you must drill out. Get one here!

Super handy little bit size gauge

Best that all, they’re quite inexpensive and also will it is in something to have as component of her DIY toolbox for numerous years come come.

Drill Chart:

As promised, below are a few drill little bit charts to assist you quickly transform all conventional drill little bit sizes to their equivalent measurements.

If you’re tapping holes you’re pre-drilling girlfriend can check out ours tap drill graph for particular size conversions.

Drill Chart because that Gauge 47-96 (smallest come largest)

This chart lists the phibìc American drill gauge sizes and also converts castle to your decimal indistinguishable in both inches and also millimeters because that metric sizes.

NOTE: listed below these charts is the standard fountain size switch drill chart.

GaugeDec. (in.)Dec. (mm)GaugeDec. (in.)Dec. (mm)
960.00630.16710.0260.66
950.00670.17700.0280.711
940.00710.18690.02920.742
930.00750.191680.0310.787
920.00790.201670.0320.813
910.00830.211660.0330.838
900.00870.221650.0350.889
890.00910.231640.0360.914
880.00950.241630.0370.94
870.010.254620.0380.965
860.01050.267610.0390.991
850.0110.279600.041.016
840.01150.292590.0411.041
830.0120.305580.0421.067
820.01250.318570.0431.092
810.0130.33560.04651.181
800.01350.343550.0521.321
790.01450.368540.0551.397
780.0160.406530.05951.511
770.0180.457520.06351.613
760.020.508510.0671.702
750.0210.533500.071.778
740.02250.572490.0731.854
730.0240.61480.0761.93
720.0250.635470.07851.994

Drill Chart for Gauge 1-46 (smallest to largest)

This chart rounds the end the second half of these number gauge sizes down to #1, i m sorry is the biggest drill bit size.

Gauge Dec. (in.) Dec. (mm) Gauge Dec. (in.) Dec. (mm)
460.0812.057230.1543.912
450.0822.083220.1573.988
440.0862.184210.1594.039
430.0892.261200.1614.089
420.09352.375190.1664.216
410.0962.438180.16954.305
400.0982.489170.1734.394
390.09952.527160.1774.496
380.10152.578150.184.572
370.1042.642140.1824.623
360.10652.705130.1854.699
350.112.794120.1894.801
340.1112.819110.1914.851
330.1132.87100.19354.915
320.1162.94690.1964.978
310.123.04880.1995.055
300.12853.26470.2015.105
290.1363.45460.2045.182
280.14053.56950.20555.22
270.1443.65840.2095.309
260.1473.73430.2135.41
250.14953.79720.2215.613
240.1523.86110.2285.791

Drill Chart for Gauge Letters (smallest come largest)

Letter gauge drill sizes are used generally in north American through A starting with the smallest size working 26 size increments come Z.

Gauge Dec. (in.) Dec. (mm) Gauge Dec. (in.) Dec. (mm)
A0.2345.944N0.3027.671
B0.2386.045O0.3168.026
C0.2426.147P0.3238.204
D0.2466.248Q0.3328.433
E0.256.35R0.3398.611
F0.2576.528S0.3488.839
G0.2616.629T0.3589.093
H0.2666.756U0.3689.347
I0.2726.909V0.3779.576
J0.2777.036W0.3869.804
K0.2817.137X0.39710.08
L0.297.366Y0.40410.26
M0.2957.493Z0.41310.49

Drill bit Size Chart: Fractional to Decimal & Metric (Small to Large)

The following drill chart covers the smallest traditional drill diameter size of strong>1/64 come 21/32 and offers you the identical sizes in both decimal inches and millimeters.

Diam.Dec. (In.)Dec. (mm) Diam.Dec. (In.)Dec. (mm)
1/640.01560.396911/320.34388.7313
1/320.03130.793823/640.35949.1281
3/640.04691.19063/80.3759.525
1/160.06251.587525/640.39069.9219
5/640.07811.984413/320.406310.3188
3/320.09382.381327/640.421910.7156
7/640.10942.77817/160.437511.1125
1/80.1253.17529/640.453111.5094
9/640.14063.571915/320.468811.9063
5/320.15633.968831/640.484412.3031
11/640.17194.36561/20.512.7
3/160.18754.762533/640.515613.0969
13/640.20315.159417/320.531313.4938
7/320.21885.556335/640.546913.8906
15/640.23445.95319/160.562514.2875
1/40.256.3537/640.578114.6844
17/640.26566.746919/320.593815.0813
9/320.28137.143839/640.609415.4781
19/640.29697.54065/80.62515.875
5/160.31257.937541/640.640616.2719
21/640.32818.334421/320.656316.6688

This final drill graph covers the standard little bit sizes from 43/64 to 1 27/64.

Diam.Dec. (In.)Dec. (mm) Diam.Dec. (In.)Dec. (mm)
43/640.671917.06561125.4
11/160.687517.462511/641.015625.7969
45/640.703117.859411/321.031326.1938
23/320.718818.256313/641.046926.5906
47/640.734418.653111/161.062526.9875
3/40.7519.0517/641.109428.1781
49/640.765619.446911/81.12528.575
25/320.781319.843815/321.156329.3688
51/640.796920.2406111/641.171929.7656
13/160.812520.637513/161.187530.1625
53/640.828121.0344113/641.203130.5594
27/320.843821.431317/321.218830.9563
55/640.859421.8281115/641.234431.3531
7/80.87522.22519/321.281332.5438
57/640.890622.6219119/641.296932.9406
29/320.906323.018815/161.312533.3375
59/640.921923.4156121/641.328133.7344
15/160.937523.8125111/321.343834.1313
61/640.953124.2094123/641.359434.5281
31/320.968824.6063113/321.406335.7188
63/640.984425.0031127/641.421936.1156

More about Drill little bit Sets and Sizing

Some other useful information to aid you in your expertise of drill bit sizes:

Fractional Sizing

Fractional sizing offers whole, half (1/2), quarter (1/4), eighth (1/8), sixteenths (1/16) and also sixty-fourths (1/64).

For example, something just above 31/64″ would be a half-inch, and also anything above 63/64″ would be a 1-inch drill bit size.

Super lengthy Bits

Long little bit sizes have typical lengths of: 12″ or 18″ overall length. These are handy in instances where you need to drill through thick or multi-layered materials.

Professionals in the electric industry for example will usage these once running wires or cables with finished walls and ceilings.

Other home builders will use masonry bits in your hammer drills to boring through products such together concrete, stones and bricks.

This is especially useful when developing a feet from the exterior of your home to the interior. Lengths of approximately 18″ or an ext may it is in needed.

Drill Bit suggest Angles

The common sizes of drill bit allude angles room 115° or 118° (degrees).

When buying a an excellent set, ensure it contains more than just one the the typical (important) dimension drill bits.

See more: How Much Do Snakebite Piercings Cost ? Snake Bites Piercing: Guide & Images

Bits perform break together they undermine from usage and also high quantities of heat created from friction.