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1 inch in mm and decimal
1 in = 1 in = 25.400 mm. Closest metric drill: 20 mm.
Nearby drill sizes
| Drill | Type | Inch | mm | Difference |
|---|---|---|---|---|
| 15/16 | fraction | .9375 in | 23.812 | -62.5 thou |
| 61/64 | fraction | .9531 in | 24.209 | -46.9 thou |
| 31/32 | fraction | .9688 in | 24.606 | -31.3 thou |
| 63/64 | fraction | .9844 in | 25.003 | -15.6 thou |
| 1 in | fraction | 1.0000 in | 25.400 | 0.0 thou |
1 thou = 0.001 in = 0.0254 mm. Drills a few thou apart are usually interchangeable for clearance holes, but not for tap drills or reamer pilots.
1 inch in other units
- Decimal inches: 1
- Millimetres: 25.400 mm
- Centimetres: 2.5400 cm
- In 64ths: 64/64