Inch to Millimeter Converter
محوّل الطول المجاني, حوّل الأميال والكيلومترات والأقدام والأمتار والبوصات واليارد فورًا
1Inch=25.4Millimeter
1 Millimeter = 0.0393700787 Inch
Inch
- Symbol
- in
- System
- Metric/Imperial
- Dimension
- Various
Millimeter
- Symbol
- mm
- System
- Metric/Imperial
- Dimension
- Various
Quick Reference Table
| Inch | Millimeter | Millimeter | Inch |
|---|---|---|---|
| 1 | 25.4 | 1 | 0.0393700787 |
| 2 | 50.8 | 2 | 0.0787401575 |
| 3 | 76.2 | 3 | 0.1181102362 |
| 5 | 127 | 5 | 0.1968503937 |
| 10 | 254 | 10 | 0.3937007874 |
| 25 | 635 | 25 | 0.9842519685 |
| 50 | 1270 | 50 | 1.968503937 |
| 100 | 2540 | 100 | 3.937007874 |
| 500 | 12700 | 500 | 19.6850393701 |
| 1000 | 25400 | 1000 | 39.3700787402 |
Conversion Formula
Millimeter = Inch × 25.4
Inch = Millimeter × 0.0393700787
Factors are from BIPM SI brochure and NIST SP 811, stored unrounded and computed via a base unit. Reverse factor is 1 ÷ 25.4.
How to convert Inch to Millimeter
Multiply the value in inch by 25.4 to get millimeter. For example, 5 Inch = 127 Millimeter. All results in the الطول والمسافة converter update instantly as you type, so you can see every unit at once without manual math.
Common mistakes
Do not round the factor to 25.4 too early — keep full precision until the final display. For الطول والمسافة, always verify critical calculations (medicine, engineering) with a second source.
FAQ
- How many Millimeter in 1 Inch?
- 1 Inch = 25.4 Millimeter.
- How many Inch in 1 Millimeter?
- 1 Millimeter = 0.0393700787 Inch.
- What is the source?
- BIPM/NIST via OmniConverter base-unit engine. Source table and formula above are exact.
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