Convert drill bit (mm) to drill bit (inch) instantly. Enter a value below, or use the formula and reference table further down the page.
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How to convert drill bit (mm) to drill bit (inch)
Multiply the value by 0.03937007874.
in = mm × 0.03937007874Example: 10 mm = 0.3937 in.
Drill Bit (mm) to Drill Bit (inch) conversion table
| Drill Bit (mm) (mm) | Drill Bit (inch) (in) |
|---|---|
| 1 mm | 0.0394 in |
| 2 mm | 0.0787 in |
| 3 mm | 0.1181 in |
| 4 mm | 0.1575 in |
| 5 mm | 0.1969 in |
| 10 mm | 0.3937 in |
| 15 mm | 0.5906 in |
| 20 mm | 0.7874 in |
| 25 mm | 0.9843 in |
| 50 mm | 1.9685 in |
| 100 mm | 3.937 in |
Frequently asked questions
How many drill bit (inch) is 1 drill bit mm?
1 drill bit mm equals 0.0394 drill bit (inch).
What is the formula to convert mm to in?
To convert mm to in, multiply the value by 0.03937007874. The full formula is: in = mm × 0.03937007874.
How do I convert drill bit (inch) back to drill bit (mm)?
Use the same calculator above and type your value into the drill bit (inch) field instead — it converts in both directions. Or use the reverse formula: mm = in ÷ 0.03937007874.
Is the mm to in conversion exact?
The conversion factor used here (0.03937007874) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.