Convert kilometers to inches
Converting kilometers to inches is a common length task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 km equals 39,370.1 in, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert kilometers to inches
To convert kilometers to inches, multiply the number of kilometers by 39,370.1. For example, 10 km × 39,370.1 = 393,701 in.
in = km × 39,370.1
- Write down the value in kilometers you want to convert.
- Multiply it by 39,370.1 (the exact km→in factor).
- The result is your value in inches. Check it below with the converter or the table.
Conversion table
Common values of kilometers and their equivalents in inches:
| km | in |
|---|---|
| 1 | 39,370.1 |
| 2 | 78,740.2 |
| 3 | 118,110 |
| 4 | 157,480 |
| 5 | 196,850 |
| 10 | 393,701 |
| 20 | 787,402 |
| 25 | 984,252 |
| 50 | 1,968,500 |
| 100 | 3,937,010 |
| 250 | 9,842,520 |
| 500 | 19,685,000 |
About these units
Kilometer (km). A kilometer equals 1,000 meters and is the standard metric unit for road distances and geography. One kilometer is about 0.62 miles or a 12-minute walk.
Inch (in). An inch is a unit of the imperial and US customary systems, legally defined as exactly 25.4 millimeters since 1959. It is used for screen sizes, tools and construction in the United States.
Frequently asked questions
How do I convert kilometers to inches?
To convert kilometers to inches, multiply the number of kilometers by 39,370.1. For example, 10 km × 39,370.1 = 393,701 in. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many inches are in 1 kilometer?
1 km = 39,370.1 in. That is the fixed relationship used by this converter and by international standards.
How many kilometers are in 1 inch?
1 in = 0.0000254 km. If you are converting in the opposite direction, use our Inch to Kilometer converter for the dedicated table and FAQ.
Is the kilometers to inches conversion exact?
Yes. Both units are defined by international agreement, so the factor of 39,370.1 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is kilometer used for?
A kilometer equals 1,000 meters and is the standard metric unit for road distances and geography. One kilometer is about 0.62 miles or a 12-minute walk.