Enter Inches (in) and Millimeters (mm) to review mm with this tool. The result expresses the same measurement in millimeters.
Common inch fractions and their millimeter equivalents:
Converted value = Source value × Conversion factor
For affine conversions such as temperature, an offset is also applied.The calculation links Inches (in) and Millimeters (mm) to mm. The result expresses the same measurement in millimeters. The relationship is millimeters = inches × 25.4.
Enter Inches (in) and Millimeters (mm) to review mm with this tool. The result expresses the same measurement in millimeters.
Compare inch-based hardware or component measurements with millimeter specifications.
The result expresses the same measurement in millimeters. The relationship is millimeters = inches × 25.4.
Prepare Inches (in) and Millimeters (mm). Enter the inches amount in the source field and read the millimeters output; retain extra digits until the final required rounding.
The result expresses the same measurement in millimeters. The relationship is millimeters = inches × 25.4. A converted nominal size is not a guarantee of part compatibility or manufacturing tolerance.
Use the full settings in the worked-example table. They produce mm: 25.400000. Compare the method and units as well as the displayed number.
The displayed relationship is millimeters = inches × 25.4 Enter the inches amount in the source field and read the millimeters output; retain extra digits until the final required rounding.
A converted nominal size is not a guarantee of part compatibility or manufacturing tolerance. Check the original measurement, source data and the convention required by the task.
Worked inches to millimeters converter example. Set Inches (in) = 1; Millimeters (mm) = 25.400000. The corresponding output is mm: 25.400000. The result expresses the same measurement in millimeters.
Compare inch-based hardware or component measurements with millimeter specifications.
Enter the inches amount in the source field and read the millimeters output; retain extra digits until the final required rounding.
| Field | Example value | Entry check |
|---|---|---|
| Inches (in) | 1 | Read the source and destination units carefully; retain precision until the final rounding. |
| Millimeters (mm) | 25.400000 | Read the source and destination units carefully; retain precision until the final rounding. |
Relationship used for this example: millimeters = inches × 25.4
The result expresses the same measurement in millimeters. The relationship is millimeters = inches × 25.4.
| Output | Displayed result |
|---|---|
| mm | 25.400000 |
With these settings, mm is 25.400000. Use the same units and calculation mode when reproducing this example.
The result expresses the same measurement in millimeters. The relationship is millimeters = inches × 25.4. A converted nominal size is not a guarantee of part compatibility or manufacturing tolerance.
Replace the illustrative inches (in) value (1) with your own value, then complete the other inputs for the same scenario. Enter the inches amount in the source field and read the millimeters output; retain extra digits until the final required rounding.