EXACT CONVERSION FORMULA
Millimeters (mm) = Inches (in) ร 25.4
1 inch equals exactly 25.4 millimeters. Multiply inches by 25.4 to get mm.
Inches to Millimeters Conversion Table
Quick reference lookup table for converting common values from inches to millimeters:
| Inches (in) | Millimeters (mm) |
|---|---|
| 0.25 in | 6.35 mm |
| 0.5 in | 12.7 mm |
| 0.75 in | 19.05 mm |
| 1 in | 25.4 mm |
| 1.5 in | 38.1 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 |
| 8 in | 203.2 mm |
| 10 in | 254 mm |
| 12 in | 304.8 mm |
Practical Examples
1 in = 25.4 mm
Exact definition
0.5 in = 12.7 mm
Half inch in mm
12 in = 304.8 mm
One foot in mm
Frequently Asked Questions
How many mm is 1 inch?
1 inch is exactly 25.4 millimeters.