Convert Inches to Kilometers
Convert units instantly — free, private, no signup.
Common Conversions
| Inches (in) | Kilometers (km) |
|---|---|
| 1 | 2.5400e-5 |
| 2 | 5.0800e-5 |
| 5 | 0.000127 |
| 10 | 0.000254 |
| 20 | 0.000508 |
| 50 | 0.00127 |
| 100 | 0.00254 |
| 200 | 0.00508 |
| 500 | 0.0127 |
| 1000 | 0.0254 |
| 2000 | 0.0508 |
| 5000 | 0.127 |
| 10000 | 0.254 |
| 20000 | 0.508 |
| 50000 | 1.2700 |
| 100000 | 2.5400 |
| 200000 | 5.0800 |
| 500000 | 12.7000 |
| 1000000 | 25.4000 |
| 10000000 | 254.00 |
What Is Inches TO Kilometers?
One inch equals exactly 0.0000254 kilometers, or 25.4 micrometers expressed differently as 0.0254 meters. This conversion bridges the smallest common imperial measurement with geographic-scale distances. Precision machining tolerances measured in thousandths of an inch must occasionally be contextualized against distances measured in kilometers — for instance, a 0.001-inch tolerance applied over a 1 km pipeline means ensuring alignment to within 0.0000000254 km at each joint. Surveyors using inch-calibrated instruments working on kilometer-scale projects must understand this relationship. The factor 0.0000254 is exact, following from the definition of the inch as exactly 25.4 mm = 0.0254 m = 0.0000254 km.
Formula
Multiply the inch value by 0.0000254 to get kilometers. Since 1 inch = 0.0254 m and 1 km = 1000 m, the factor is 0.0254/1000 = 0.0000254 km per inch exactly.
Best For:
- Surveying: relating inch-calibrated instrument precision to km-scale map accuracy
- Pipeline engineering: understanding tolerances across kilometer distances
- Cartography: converting inch measurements on large-format maps to ground distances in km
How to Inches TO Kilometers
Enter a Value
Type the number you want to convert in the input field above.
See Instant Result
The converted value is calculated instantly — no button click needed.
Swap or Explore
Click the swap button to reverse the conversion, or explore the common values table.
TweakFiles vs Google vs UnitConverters.net
| Feature | TweakFiles | UnitConverters.net | |
|---|---|---|---|
| Price | Free forever | Free | Free |
| File Privacy | 100% client-side | Server-side | Server-side |
| Dedicated page per pair | Yes — SEO optimized | No | Yes |
| Common values table | 20+ values | No | Limited |
| Formula explanation | Detailed | No | Brief |
| Ads | None | Minimal | Heavy |