1 in to mm
1 inches equals 25.4 millimeters.
Chinese version: 1 英寸等于多少毫米
Result
1 in = 25.4 mm
Formula: 1 × 25.4 = 25.4
Conversion steps
- The conversion factor: 1 inch = 25.4 millimeters.
- Multiply: 1 × 25.4 = 25.4 millimeters.
- So 1 inch = 25.4 millimeters (1 in = 25.4 mm).
Nearby values
Frequently asked questions
Multiply 1 by the conversion factor 25.4: 1 × 25.4 = 25.4 mm.
1 inch = 25.4 millimeters. For the reverse conversion, 1 millimeter = 0.0394 inches.
Yes — the factor 25.4 follows the international (SI) definition of these units, so 1 in = 25.4 mm is exact to the displayed precision.