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Convert inches to mm
Convert inch (in) to millimeter (mm) instantly. Free, no signup, nothing is uploaded — everything runs in your browser.
Inch (in)
To
25.4
Millimeter (mm)
Inch to Millimeter conversion table
| Inch [in] | Millimeter [mm] |
|---|---|
| 0.01 | 0.254 |
| 0.1 | 2.54 |
| 1 | 25.4 |
| 2 | 50.8 |
| 3 | 76.2 |
| 5 | 127 |
| 10 | 254 |
| 20 | 508 |
| 50 | 1,270 |
| 100 | 2,540 |
| 1,000 | 25,400 |
How to convert inch to millimeter
mm = inches × 25.4
Example: 5 in = 5 × 25.4 = 127 mm
To convert back (millimeter to inch): inches = mm ÷ 25.4
What is a inch?
An inch (in) is a unit of length in the US customary and imperial systems, defined as exactly 25.4 millimeters.
What is a millimeter?
A millimeter (mm) is a unit of length in the metric system, equal to one thousandth of a meter. It is the standard unit for small precise measurements.