This converter turns miles into kilometers instantly, using the exact factor 1 mile = 1.609344 kilometers. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The statute mile: 5,280 feet, used for road distance in the US, UK and a handful of others. One thousand metres — the standard road-distance unit almost everywhere outside the US and UK.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
miles- The amount you are converting, measured in miles
1.609344- The exact number of kilometers in one mile
kilometers- The converted result
How it works, step by step
- Enter the number of miles you want to convert.
- The value is multiplied by 1.609344, the exact conversion factor.
- The result is displayed in kilometers, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 miles
Multiply 5 by 1.609344. That gives 8.0467 kilometers. A quick sanity check: one mile is larger than one kilometer, so the number should get bigger — and it does.
Converting 72 miles
72 × 1.609344 = 115.8728 kilometers. Working backwards, 115.8728 ÷ 1.609344 returns 72 miles, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many kilometers are in one mile?
Exactly 1.609344. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert miles to kilometers?
Kilometers = miles × 1.609344. To reverse it, divide instead: miles = kilometers ÷ 1.609344, which is the same as multiplying by 0.6213711922.
Is the mile bigger than the kilometer?
Yes. One mile equals 1.60934 kilometers, so it is the larger unit.
Why does my answer differ slightly from other miles to km converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a mile?
The statute mile: 5,280 feet, used for road distance in the US, UK and a handful of others.
What is a kilometer?
One thousand metres — the standard road-distance unit almost everywhere outside the US and UK.
Miles to kilometers reference table
| Miles | Kilometers |
|---|---|
| 0.5 mi | 0.804672 km |
| 1 mi | 1.6093 km |
| 2 mi | 3.2187 km |
| 3 mi | 4.828 km |
| 5 mi | 8.0467 km |
| 10 mi | 16.0934 km |
| 15 mi | 24.1402 km |
| 20 mi | 32.1869 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
| 75 mi | 120.7008 km |
| 100 mi | 160.9344 km |
| 250 mi | 402.336 km |
| 500 mi | 804.672 km |
| 1000 mi | 1,609.34 km |
Exact factor: 1 mile = 1.609344 kilometers. Values rounded for display.