ConvBolt — Unit ConverterKilometers to Miles Converter
Converting kilometers to miles is a multiplication by a fixed factor: 1 km = 0.6213712 mi. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one kilometer works out to 0.6213712 mi, the mile is the smaller unit of the two: a figure given in mile always carries a smaller number than the same measurement in kilometer. A chart drawn in km can hide that, so check which label the axis uses before you compare two readings.
Technical documentation is the other common source — a datasheet drawn up in kilometers often has to be re-expressed in miles for a supplier or a regulator who works in the other system.
The conversion factor used here is 0.6213712 mi per kilometer (7 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 km a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 1.609344 km per mi, the exact reciprocal, so a round trip through both pages returns your original number.
Kilometers to Miles formula
Use this formula to convert any kilometer value to miles:
Worked example: 100 km × 0.6213712 = 62.13712 mi.
Kilometers to Miles conversion table
| Kilometers (km) | Miles (mi) |
|---|---|
| 0.5 km | 0.3106856 mi |
| 1 km | 0.6213712 mi |
| 2 km | 1.242742 mi |
| 5 km | 3.106856 mi |
| 10 km | 6.213712 mi |
| 20 km | 12.42742 mi |
| 50 km | 31.06856 mi |
| 100 km | 62.13712 mi |
| 500 km | 310.6856 mi |
| 1000 km | 621.3712 mi |
How to convert kilometers to miles
Multiply the kilometer value by 0.6213712 to get the equivalent in miles. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Miles to Kilometers converter instead of dividing by hand; both pages use the same source factors. For every other km conversion in one place, see the km conversion hub.
Frequently asked questions
How many miles are in 1 kilometer?
1 kilometer = 0.6213712 mi.
What is 100 kilometers in miles?
100 km = 62.13712 mi.
Is converting kilometers to miles the same as miles to kilometers?
No — the direction changes the multiplier. The reverse conversion (1 mi = 1.609344 km) is on the Miles to Kilometers page.
Related conversions
Try the ConvBolt Unit Converter for any other length unit, browse the Length conversions, or read our conversion guides.