Inches to Millimeters
Convert inches to millimeters instantly — type a value, get the answer.
Millimeters25.4000mm
Multiply inches by 25.4 to get millimeters. 1 in = 25.4 mm.
| Inches (in) | Millimeters (mm) |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 25 in | 635 mm |
| 50 in | 1,270 mm |
| 100 in | 2,540 mm |
Common inches-to-millimeters conversions, rounded to 4 decimals.
How to convert inches to millimeters
Multiply the number of inches by 25.4. For example, 10 in × 25.4 = 254 mm. The converter above does this for any value instantly, and the table below lists the conversions people look up most.
Converting millimeters back to inches
To go the other way, divide the mm value by 25.4 — or multiply by 0.0394. So 1 mm ≈ 0.0394 in.
Questions
How many millimeters are in a inche?
One inche equals 25.4 millimeters. Multiply any in figure by 25.4 to convert it to mm.
How do I convert millimeters back to inches?
Divide the mm value by 25.4, or multiply by 0.0394. For example, 5 mm ≈ 0.1969 in.
What is 10 in in mm?
10 in = 254 mm. Type any value into the converter above to see its millimeters equivalent.