ConvBolt — Unit ConverterMiles to Kilometers Converter
Converting miles to kilometers is a multiplication by a fixed factor: 1 mi = 1.609344 km. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one mile works out to 1.609344 km, the kilometer is the larger unit of the two: a figure given in kilometer always carries a larger number than the same measurement in mile. A chart drawn in mi 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 miles often has to be re-expressed in kilometers for a supplier or a regulator who works in the other system.
The conversion factor used here is 1.609344 km per mile (6 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 mi a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 0.6213712 mi per km, the exact reciprocal, so a round trip through both pages returns your original number.
Miles to Kilometers formula
Use this formula to convert any mile value to kilometers:
Worked example: 100 mi × 1.609344 = 160.9344 km.
Miles to Kilometers conversion table
| Miles (mi) | Kilometers (km) |
|---|---|
| 0.5 mi | 0.804672 km |
| 1 mi | 1.609344 km |
| 2 mi | 3.218688 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 20 mi | 32.18688 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
| 500 mi | 804.672 km |
| 1000 mi | 1609.344 km |
How to convert miles to kilometers
Multiply the mile value by 1.609344 to get the equivalent in kilometers. 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 Kilometers to Miles converter instead of dividing by hand; both pages use the same source factors. For every other mi conversion in one place, see the mi conversion hub.
Frequently asked questions
How many kilometers are in 1 mile?
1 mile = 1.609344 km.
What is 100 miles in kilometers?
100 mi = 160.9344 km.
Is converting miles to kilometers the same as kilometers to miles?
No — the direction changes the multiplier. The reverse conversion (1 km = 0.6213712 mi) is on the Kilometers to Miles page.
Related conversions
Try the ConvBolt Unit Converter for any other length unit, browse the Length conversions, or read our conversion guides.