Please provide values below to convert Inch [in] to Millimeter [mm], or vice versa.
1 Inch (in) = 25.4 Millimeter (mm)
1 Millimeter (mm) = 0.03937007874 Inch (in)
Example: convert 15 Inch (in) to Millimeter (mm):
15 Inch (in) = 15 × 25.4 Millimeter (mm) = 381 Millimeter (mm)
An inch is 1/12 of a foot. It is used in the United States and United Kingdom for small measurements.
| Inch [in] | Millimeter [mm] |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 20 in | 508 mm |
| 50 in | 1,270 mm |
| 100 in | 2,540 mm |
| 200 in | 5,080 mm |
| 500 in | 12,700 mm |
| 1000 in | 25,400 mm |
Enter the input value, choose source and target units, and read the converted result shown instantly.
Converted Value = Input Value × (From Unit Factor / To Unit Factor). For non-linear domains, category-specific standard formulas are applied.
If 1 source unit equals 1000 target units, then 2 source units equal 2000 target units. Use the live converter above for exact values.
Q: Is this conversion accurate?
A: Yes, it uses fixed reference factors or tested standard formulas.
Q: Can I reverse the conversion?
A: Yes, swap the units or use the reverse conversion direction.