How to use it
- Type the number of Millimeters in the first field.
- Read the result in Inches. You can also type in the Inches field to convert the other way.
- Use the table of common values, or copy the result with one click.
How it works
Formula: in = mm × 0.039370079
1 mm = 0.03937 in, and 1 in = 25.4 mm.
Results use the exact definitions of both units. The page shows up to 6 decimal places; copy the value for full precision.
Examples
1 mm in in
1 mm = 0.03937 in, using in = mm × 0.039370079.
10 mm in in
10 mm = 0.393701 in, using in = mm × 0.039370079.
25.4 mm in in
25.4 mm = 1 in, using in = mm × 0.039370079.
Frequently asked questions
How do I convert Millimeters to Inches?
Use the formula in = mm × 0.039370079. For example, 1 mm = 0.03937 in.
How do I convert Inches back to Millimeters?
Use the reverse formula mm = in × 25.4. For example, 1 in = 25.4 mm.
How accurate is this converter?
It uses the exact legal definitions of the units, so the only rounding is in the number of decimals shown. Copy the result to get the full value.
Privacy
The conversion runs entirely in your browser. Nothing you type is sent anywhere.