Drill Size Conversion
Convert between metric, imperial (inches), and numbered drill sizes.
Conversions
| Metric: | - |
| Imperial (inches): | - |
| Fractional (approx): | - |
| Numbered Drill: | - |
Common Drill Size Reference
| Metric (mm) | Inches (decimal) | Fractional | Number |
| 0.5 | 0.0197 | - | - |
| 0.75 | 0.0295 | - | - |
| 1.0 | 0.0394 | 1/64" | 70 |
| 1.2 | 0.0472 | - | 68 |
| 1.5 | 0.0591 | - | 61 |
| 1.6 | 0.0630 | - | 61 |
| 1.8 | 0.0709 | - | 57 |
| 2.0 | 0.0787 | 5/64" | 55 |
| 2.2 | 0.0866 | - | 53 |
| 2.5 | 0.0984 | - | 50 |
| 2.8 | 0.1102 | - | 46 |
| 3.0 | 0.1181 | 3/32" | 54 |
| 3.2 | 0.1260 | - | 52 |
| 3.5 | 0.1378 | - | 48 |
| 3.7 | 0.1457 | - | 47 |
| 4.0 | 0.1575 | 5/32" | 43 |
| 4.5 | 0.1772 | - | 39 |
| 5.0 | 0.1969 | 3/16" | 38 |
| 5.5 | 0.2165 | - | 34 |
| 6.0 | 0.2362 | 15/64" | 32 |
| 6.5 | 0.2559 | - | 29 |
| 7.0 | 0.2756 | - | 26 |
| 8.0 | 0.3150 | 5/16" | 29 |
| 9.0 | 0.3543 | - | 25 |
| 10.0 | 0.3937 | 3/8" | 25 |
| 12.0 | 0.4724 | 15/32" | 18 |