Inch to Millimeter Converter
Convert inches to millimeters instantly with our accurate and easy-to-use conversion tool.
Millimeter
Conversion Formula
Millimeter = Inch × 25.4Where:
- in = Inch
- mm = Millimeter
About Inch
The inch (in) is a unit of lengthin the imperial system of measurement.
About Millimeter
The millimeter (mm) is a unit of lengthin the metric system of measurement.
How to Convert Inch to Millimeter
To convert from inches to millimeters, use our converter above. Simply enter the value in inchesand get instant results in millimeters.
Quick Reference:
- 1 in = 25.400000 mm
- 1 mm = 0.039370 in
Common Inch to Millimeter Conversions
= 25.40 mm
= 127.00 mm
= 254.00 mm
= 635.00 mm
= 1270.00 mm
= 2540.00 mm
Conversion Reference Table
| Inch (in) | Millimeter (mm) |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 3 | 76.2 |
| 4 | 101.6 |
| 5 | 127 |
| 10 | 254 |
| 15 | 381 |
| 20 | 508 |
| 25 | 635 |
| 50 | 1,270 |
| 75 | 1,905 |
| 100 | 2,540 |
| 250 | 6,350 |
| 500 | 12,700 |
| 1,000 | 25,400 |
Quick reference table showing common inches to millimeters conversions.
Real-World Length Conversions
Running and Athletics
Track events like the 100-meter dash or marathon (26.2 miles). Athletes and coaches use conversions to compare international race distances.
Travel and Navigation
Converting road distances when traveling between countries. Speed limits and road signs may use different units (km/h vs mph).
Construction and Architecture
Building plans may use different units. Converting between feet and meters is essential for international construction projects.
Aviation and Aerospace
Flight altitudes are measured in feet, but distances may be in nautical miles or kilometers depending on the region.
Sports Fields and Courts
Soccer fields (100-130 yards), basketball courts (94 feet), and Olympic pools (50 meters) require conversions for international standards.
Science and Research
Scientific measurements typically use metric units, but may need conversion when collaborating with institutions using different systems.