Convert 1 Inches to Millimeters
1 inches equals 25.4 millimeters. Use the converter to change the value, see the formula and compare nearby conversions.
1 in = 25.4 mm
Worked example
mm = in × 25.4
1 in × 25.4 = 25.4 mm
Nearby values
| in | mm |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 4 in | 101.6 mm |
| 5 in | 127 mm |
| 6 in | 152.4 mm |
| 7 in | 177.8 mm |
| 8 in | 203.2 mm |
| 9 in | 228.6 mm |
Inches → Millimeters · Millimeters → Inches
Frequently asked questions
How do I convert Inches to Millimeters?
Use this formula: mm = in × 25.4. For example, 1 in × 25.4 = 25.4 mm.