Drill Bit Decimal Size Equivalents
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About Drill Bits
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Fast-Cutting Smooth-Finish Drill Bits for Wood
Multiple outlining teeth bore clean, flat-bottom holes without chipping or splintering your surface—even when cutting across the grain. These bits are excellent for boring straight holes, overlapping holes, and holes on close centers in soft wood, veneer, and laminates. The center guide point prevents the bit from wandering. Also known as multispur bits or Forstner bits.
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 | Point Style | Each | |
Inch | ||||||||
Uncoated Steel | ||||||||
| 1/4" | 0.25" | 4" | 2" | Round | 1/2" | Standard | 0000000 | 000000 |
| 5/16" | 0.3125" | 4" | 2" | Round | 1/2" | Standard | 0000000 | 00000 |
| 3/8" | 0.375" | 4" | 2" | Round | 1/2" | Standard | 0000000 | 00000 |
| 7/16" | 0.4375" | 4" | 2" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1/2" | 0.5" | 5" | 3" | Round | 1/2" | Standard | 0000000 | 00000 |
| 9/16" | 0.5625" | 5" | 3" | Round | 1/2" | Standard | 0000000 | 00000 |
| 5/8" | 0.625" | 5" | 3" | Round | 1/2" | Standard | 0000000 | 00000 |
| 11/16" | 0.6875" | 5" | 3" | Round | 1/2" | Standard | 0000000 | 00000 |
| 3/4" | 0.75" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 13/16" | 0.8125" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 7/8" | 0.875" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 15/16" | 0.9375" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1" | 1" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 1/16" | 1.0625" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 1/8" | 1.125" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 3/16" | 1.1875" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 1/4" | 1.25" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 5/16" | 1.3125" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 3/8" | 1.375" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 7/16" | 1.4375" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 1/2" | 1.5" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 9/16" | 1.5625" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 5/8" | 1.625" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 11/16" | 1.6875" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 3/4" | 1.75" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 13/16" | 1.8125" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 7/8" | 1.875" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 15/16" | 1.9375" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2" | 2" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 1/8" | 2.125" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 1/4" | 2.25" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 3/8" | 2.375" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 1/2" | 2.5" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 3/4" | 2.75" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 7/8" | 2.875" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 000000 |
| 3" | 3" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 000000 |