Inches to Millimeters (in to mm)
Convert inches to millimeters with the calculator below. 1 inch equals 25.4 millimeters.
Reverse: Millimeters to Inches (MM to Inches) →
How to convert inches to millimeters
Multiply the value in inches by 25.4. Formula: mm = in x 25.4.
1 in = 25.4 mm1 mm = 0.03937007874 in
Example
Convert 10 inches to millimeters: 10 in = 254 mm.
Inches to MM conversion table
| Inches (in) | Millimeters (mm) |
|---|---|
| 0.1 in | 2.54 mm |
| 0.25 in | 6.35 mm |
| 0.5 in | 12.7 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 |
| 10 in | 254 mm |
| 12 in | 304.8 mm |
| 15 in | 381 mm |
| 20 in | 508 mm |
| 25 in | 635 mm |
| 30 in | 762 mm |
| 40 in | 1016 mm |
| 50 in | 1270 mm |
| 75 in | 1905 mm |
| 100 in | 2540 mm |
| 250 in | 6350 mm |
| 500 in | 12700 mm |
| 1000 in | 25400 mm |
Convert inches to other units
- Inches to CM
- Inches to M
- Inches to KM
- Inches to Feet
- Inches to Yards
- Inches to Miles
- Inches to Nautical Miles
- Inches to Micrometers
- Inches to Nanometers
- Inches to Decimeters
- Inches to Light Years
Convert other units to millimeters
- CM to MM
- M to MM
- KM to MM
- Feet to MM
- Yards to MM
- Miles to MM
- Nautical Miles to MM
- Micrometers to MM
- Nanometers to MM
- Decimeters to MM
- Light Years to MM
Frequently asked questions
How many millimeters are in 1 inch?
1 inch = 25.4 millimeters.
How do you convert inches to millimeters?
Multiply the value in inches by 25.4. Formula: mm = in x 25.4.
How many inches are in 1 millimeter?
1 millimeter = 0.03937007874 inches.