Mile to KM Converter – Miles to Kilometers and Back
Mile to KM Converter
Convert linear distance parameters instantly with premium validation speed
Quick answer
To convert mile to km, multiply the miles by 1.609344, the exact length of an international mile in kilometers. For example, 26.2 mi × 1.609344 = 42.1648 km, the length of a marathon. To go from km to miles, divide by 1.609344: 10 km = 6.2137 mi.
Our free Mile to KM Converter handles both directions with one click. Enter a distance and it shows the result to four decimals, the exact constant, and the formula with your number. Use it for running and cycling distances, road trips, maps, and car speed or fuel figures.
How Long Is a Mile in Kilometers?
One international mile is exactly 1.609344 km, which equals 1,609.344 meters or 5,280 feet. One kilometer is about 0.6214 miles. The mile is defined from the international foot (exactly 0.3048 m), so the factor is exact and the same everywhere it is used: in the United States, the United Kingdom for road signs, and in running and aviation contexts.
Do not confuse it with the nautical mile, used at sea and in the air, which is 1.852 km. This tool uses the regular statute mile.
Mile to KM Formula
| Conversion | Formula | Example |
|---|---|---|
| Miles to kilometers | km = mi × 1.609344 | 5 mi = 8.0467 km |
| Kilometers to miles | mi = km ÷ 1.609344 | 5 km = 3.1069 mi |
| mph to km/h | km/h = mph × 1.609344 | 60 mph = 96.56 km/h |
How to Use the Mile to KM Converter
The tool is at the top of this page. These four steps take a few seconds.
Step 1: Choose Miles to Kilometers or Kilometers to Miles
Click Miles to Kilometers or Kilometers to Miles. The label and unit badge change to match. We keep Miles to Kilometers selected.
Step 2: Enter the Distance in Miles
Type the distance into the box. Decimals are fine. In our example we enter 26.2 miles, a full marathon.
Step 3: Click Convert Distance
Press Convert Distance. If the field is empty or the number is negative, the tool asks for a valid distance.
Step 4: Read the Distance in Kilometers
The result box shows 42.1648 km. Under it you will see the international standard (1 mile = 1.609344 km) and the formula with your number, so you can check the result yourself.
Miles to KM Conversion Chart
| Miles | Kilometers |
|---|---|
| 0.25 mi | 0.4023 km |
| 0.5 mi | 0.8047 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 |
| 20 mi | 32.1869 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
KM to Miles Conversion Chart
| Kilometers | Miles |
|---|---|
| 1 km | 0.6214 mi |
| 3 km | 1.8641 mi |
| 5 km | 3.1069 mi |
| 10 km | 6.2137 mi |
| 15 km | 9.3206 mi |
| 50 km | 31.0686 mi |
| 80 km | 49.7097 mi |
| 100 km | 62.1371 mi |
| 120 km | 74.5645 mi |
Running Race Distances in Miles and KM
| Race | Kilometers | Miles |
|---|---|---|
| 5K | 5 km | 3.1069 mi |
| 10K | 10 km | 6.2137 mi |
| Half marathon | 21.0975 km | 13.1094 mi |
| Marathon | 42.195 km | 26.2188 mi |
| 50K ultra | 50 km | 31.0686 mi |
The same factor works for speed. A 60 mph limit is 96.56 km/h, and 70 mph is 112.65 km/h. For other speed units, try our speed converter.
Quick Mental Shortcut: The Fibonacci Trick
The ratio between neighbouring Fibonacci numbers (1, 2, 3, 5, 8, 13, 21, 34, 55, 89) is close to 1.6, which is almost the mile to km factor. So 5 miles is about 8 km, 8 miles is about 13 km, and 13 miles is about 21 km. Another simple rule is to multiply miles by 1.6, or to get miles from km, multiply km by 0.6. These are fine for a quick guess, but use the converter above when you need the exact figure.
Common Mistakes to Avoid
- Multiplying when you should divide. A kilometer is shorter than a mile, so the km number is always larger. If your answer in km is smaller than the miles, flip the operation.
- Using the nautical mile. A nautical mile is 1.852 km. Use it only for sea and air navigation.
- Rounding the factor to 1.6 for long trips. Over 500 miles the shortcut is off by almost 5 km.
- Converting fuel economy directly. Miles per gallon to liters per 100 km also involves gallons, so it needs a different formula.
Who Uses a Mile to KM Converter?
Runners and cyclists following training plans written in the other unit, travellers reading road signs abroad, drivers checking speed limits, students working through physics problems, and anyone comparing distances on maps from different countries. For shorter lengths, use our length converter.
Frequently Asked Questions
How do I convert mile to km?
Multiply the miles by 1.609344. For example, 5 mi × 1.609344 = 8.0467 km.
How many km is 1 mile?
One mile is exactly 1.609344 kilometers, or 1,609.344 meters.
How many miles is 10 km?
10 km is 6.2137 miles. A 10K race is a little over six miles.
How many km is a marathon?
A marathon is 42.195 km, which is 26.2188 miles. It is usually written as 26.2 miles.
Is a mile longer than a kilometer?
Yes. A mile is about 1.61 times as long as a kilometer.
Does this tool use nautical miles?
No. It uses the international statute mile (1.609344 km). A nautical mile is 1.852 km.
Is this mile to km converter free?
Yes. It is free, needs no sign-up, and runs entirely in your browser.