Drill Bit Decimal Size Equivalents
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About Drill Bits
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Short-Length Carbide-Tipped Drill Bits
Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than standard-length drill bits. Made of carbide-tipped steel, which has better wear resistance than high-speed steel and cobalt steel, they maintain a sharper, harder edge at high temperatures for excellent performance on abrasive material, such as plastic. Because they aren’t as brittle as solid carbide bits, they can be used in less rigid setups, such as a hand-held drill.
Drill bits with a split point keep centered without a pilot hole.
Drill bits with 135° point angle produce smaller chips than 118° point to prevent clogging.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | For Use On | Point Angle | Each | |
Standard Point | |||||||||
Inch | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
| 1/8" | 0.125" | 1 7/8" | 0.36" | Round | 1/8" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 000000 |
| 9/64" | 0.1406" | 2 1/8" | 0.42" | Round | 9/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 5/32" | 0.1563" | 2 1/8" | 0.45" | Round | 5/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 11/64" | 0.1719" | 2 1/4" | 0.51" | Round | 11/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 3/16" | 0.1875" | 2 1/4" | 0.54" | Round | 3/16" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 13/64" | 0.2031" | 2 3/8" | 0.6" | Round | 13/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 7/32" | 0.2188" | 2 3/8" | 0.63" | Round | 7/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 1/4" | 0.25" | 2 1/2" | 0.75" | Round | 1/4" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 17/64" | 0.2656" | 2 3/4" | 0.78" | Round | 17/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 9/32" | 0.2813" | 2 3/4" | 0.84" | Round | 9/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 5/16" | 0.3125" | 2 7/8" | 0.93" | Round | 5/16" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 11/32" | 0.3438" | 3" | 1.02" | Round | 11/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 3/8" | 0.375" | 3 1/8" | 1.11" | Round | 3/8" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 25/64" | 0.3906" | 3 3/8" | 1.17" | Round | 25/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 13/32" | 0.4063" | 3 3/8" | 1.2" | Round | 13/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 27/64" | 0.4219" | 3 1/2" | 1.26" | Round | 27/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 7/16" | 0.4375" | 3 1/2" | 1.29" | Round | 7/16" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 1/2" | 0.5" | 3 3/4" | 1.5" | Round | 1/2" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 17/32" | 0.5313" | 3 7/8" | 1.59" | Round | 17/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 9/16" | 0.5625" | 4" | 1.68" | Round | 9/16" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 5/8" | 0.625" | 4 1/4" | 1.86" | Round | 5/8" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 11/16" | 0.6875" | 4 5/8" | 2.04" | Round | 11/16" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 3/4" | 0.75" | 5" | 2.25" | Round | 3/4" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
Metric | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
| 3.5 mm | 0.1378" | 52mm | 10.5mm | Round | 3.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 4.0 mm | 0.1575" | 52mm | 12mm | Round | 4mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 4.5 mm | 0.1772" | 56mm | 13.5mm | Round | 4.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 5.0 mm | 0.1968" | 60mm | 15mm | Round | 5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 5.5 mm | 0.2165" | 60mm | 16.5mm | Round | 5.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 6.0 mm | 0.2362" | 64mm | 18mm | Round | 6mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 6.5 mm | 0.2559" | 68mm | 19.5mm | Round | 6.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 7.0 mm | 0.2756" | 68mm | 21mm | Round | 7mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 7.5 mm | 0.2953" | 71mm | 22.5mm | Round | 7.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 8.0 mm | 0.315" | 71mm | 24mm | Round | 8mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 8.5 mm | 0.3346" | 76mm | 25.5mm | Round | 8.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 9.0 mm | 0.3543" | 79mm | 27mm | Round | 9mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 9.5 mm | 0.374" | 79mm | 28.5mm | Round | 9.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 10.0 mm | 0.3937" | 84mm | 30mm | Round | 10mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 10.5 mm | 0.4134" | 87mm | 31.5mm | Round | 10.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 11.0 mm | 0.4331" | 87mm | 33mm | Round | 11mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 11.5 mm | 0.4528" | 92mm | 34.5mm | Round | 11.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 12.0 mm | 0.4724" | 92mm | 36mm | Round | 12mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 12.5 mm | 0.4921" | 95mm | 37.5mm | Round | 12.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 13.0 mm | 0.5118" | 98mm | 39mm | Round | 13mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 13.5 mm | 0.5315" | 98mm | 40.5mm | Round | 13.5mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
| 14.0 mm | 0.5512" | 102mm | 42mm | Round | 14mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 118° | 000000000 | 00000 |
Split Point | |||||||||
Inch | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
| 1/8" | 0.125" | 1 7/8" | 0.36" | Round | 1/8" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 9/64" | 0.1406" | 2 1/8" | 0.42" | Round | 9/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 5/32" | 0.1563" | 2 1/8" | 0.45" | Round | 5/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 11/64" | 0.1719" | 2 1/4" | 0.51" | Round | 11/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 3/16" | 0.1875" | 2 1/4" | 0.54" | Round | 3/16" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 13/64" | 0.2031" | 2 3/8" | 0.6" | Round | 13/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 7/32" | 0.2188" | 2 3/8" | 0.63" | Round | 7/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 1/4" | 0.25" | 2 1/2" | 0.75" | Round | 1/4" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 17/64" | 0.2656" | 2 3/4" | 0.78" | Round | 17/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 9/32" | 0.2813" | 2 3/4" | 0.84" | Round | 9/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 5/16" | 0.3125" | 2 7/8" | 0.93" | Round | 5/16" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 11/32" | 0.3438" | 3" | 1.02" | Round | 11/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 3/8" | 0.375" | 3 1/8" | 1.11" | Round | 3/8" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 25/64" | 0.3906" | 3 3/8" | 1.17" | Round | 25/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 13/32" | 0.4063" | 3 3/8" | 1.2" | Round | 13/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 27/64" | 0.4219" | 3 1/2" | 1.26" | Round | 27/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 7/16" | 0.4375" | 3 1/2" | 1.29" | Round | 7/16" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 1/2" | 0.5" | 3 3/4" | 1.5" | Round | 1/2" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 17/32" | 0.5313" | 3 7/8" | 1.59" | Round | 17/32" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 9/16" | 0.5625" | 4" | 1.68" | Round | 9/16" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 5/8" | 0.625" | 4 1/4" | 1.86" | Round | 5/8" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 11/16" | 0.6875" | 4 5/8" | 2.04" | Round | 11/16" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |
| 3/4" | 0.75" | 5" | 2.25" | Round | 3/4" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 135° | 0000000 | 00000 |