Miles to Kilometers Calculator
Enter a distance in miles or kilometers to see it in both, plus meters, yards, feet and nautical miles. One mile is exactly 1.609344 kilometers, so a marathon of 26.2 miles is 42.1648 km.
Last updated November 3, 2026
0 or more, up to 1,000,000,000.
Result
26.2 miles = 42.1648 kilometers
| Unit | Distance |
|---|---|
| Kilometers | 42.1648 |
| Miles | 26.2 |
| Meters | 42,164.8128 |
| Yards | 46,112 |
| Feet | 138,336 |
| Nautical miles | 22.7672 |
| Race | Kilometers | Miles |
|---|---|---|
| 5K | 5 | 3.1069 |
| 10K | 10 | 6.2137 |
| Half marathon | 21.0975 | 13.1094 |
| Marathon | 42.195 | 26.2188 |
Mental math: kilometers = miles × 1.6 (about 1.609); miles = kilometers × 0.62. A mile is exactly 1.609344 km.
Show the work
Formula: meters = amount × meters per unit; result = meters ÷ meters per target unit. 1 mile = 1,609.344 m, 1 km = 1,000 m, 1 yd = 0.9144 m, 1 ft = 0.3048 m, 1 nmi = 1,852 m.
- You entered 26.2 miles.
- Meters: 26.2 × 1,609.344 = 42,164.8128 m.
- Kilometers: 42,164.8128 ÷ 1,000 = 42.1648.
- Yards: 42,164.8128 ÷ 0.9144 = 46,112. Feet: 42,164.8128 ÷ 0.3048 = 138,336.
- Nautical miles: 42,164.8128 ÷ 1,852 = 22.7672.
Result: 26.2 miles = 42.1648 kilometers
How miles convert to kilometers
kilometers = miles × 1.609344
miles = kilometers ÷ 1.609344
1 mile = 1,609.344 m = 1,760 yd = 5,280 ft
The mile and the kilometer are both defined through the meter. Since 1959 the international yard has been exactly 0.9144 meters and the foot exactly 0.3048 meters. A statute mile is 5,280 feet, which makes it exactly 1,609.344 meters or 1.609344 kilometers. There is no rounding in that factor.
The calculator turns your distance into meters first, then divides by the number of meters in each target unit. A kilometer is 1,000 meters, a yard 0.9144 meters, a foot 0.3048 meters and a nautical mile exactly 1,852 meters. Doing every conversion through meters keeps all six answers consistent with each other.
To go from kilometers to miles you divide by 1.609344, or multiply by 0.621371. The two directions are exact inverses, so converting a value there and back returns the number you started with, apart from the rounding shown on screen.
See how we calculate for the formulas, sources and review schedule behind every calculator.
Also useful alongside this calculator: Pace Calculator, MPG Calculator and Feet to Meters Converter.
Mental math for miles and kilometers
For a quick estimate, multiply miles by 1.6 to get kilometers. Ten miles is about 16 km, and the exact answer of 16.0934 km is close enough for road signs. For kilometers to miles, multiply by 0.6 and add a little, or take 60 percent plus a tenth of that.
Another trick uses the Fibonacci numbers 3, 5, 8, 13, 21, 34. Each number in miles is roughly the next one in kilometers: 5 miles is about 8 km, and 8 miles is about 13 km. It is a rough guide only, accurate to within a few percent at these sizes.
Running race distances in miles
Races are set in kilometers in most of the world and in miles in the United States and United Kingdom. A 5K is 3.1069 miles and a 10K is 6.2137 miles. A half marathon is 21.0975 km, or 13.1094 miles, and a full marathon is 42.195 km, or 26.2188 miles.
The quick table under the result lists these four distances. When you turn a pace from minutes per mile into minutes per kilometer, divide by 1.609344. For finish-time planning across a full race distance, use the Pace Calculator.
Statute miles and nautical miles
The mile used on roads and in running is the statute mile of 1,609.344 meters. Ships and aircraft use the nautical mile, which is exactly 1,852 meters, or 1.852 km. One nautical mile is therefore about 1.1508 statute miles.
The calculator shows nautical miles in its result list so you can compare the two without a second conversion. For example, 26.2 statute miles is 22.7672 nautical miles.
Edge cases and limits
The distance must be a finite number from 0 up to 1,000,000,000. Negative numbers are rejected because a distance cannot be below zero. Decimals are accepted, so 0.5 miles gives 0.8047 km.
Results are rounded to four decimals for display only. The Show the work panel prints each multiplication and division from the numbers you typed.
How to use the Miles to Kilometers Calculator
- Type the distance you want to convert.
- Choose whether it is in miles or kilometers under Convert from.
- Read the converted distance in the headline, plus meters, yards, feet and nautical miles in the list.
- Check the race table below the result for 5K, 10K, half marathon and marathon distances.
- Open Show the work to see each step, or use Copy, Print or Share.
Worked example
A marathon course is 26.2 miles. Multiplying by 1.609344 gives 42.1648 km, which is 42,164.8128 meters, 46,112 yards or 138,336 feet. In nautical miles that is 22.7672.
| Miles | Kilometers |
|---|---|
| 1 | 1.6093 |
| 3.1 | 4.989 |
| 6.2 | 9.9779 |
| 10 | 16.0934 |
| 13.1 | 21.0824 |
| 26.2 | 42.1648 |
Frequently asked questions
How many kilometers are in a mile?
One mile is exactly 1.609344 kilometers, or 1,609.344 meters. For quick mental math, 1.6 is close enough for most trips and road signs.
How many miles are in a kilometer?
One kilometer is about 0.621371 miles. Dividing kilometers by 1.609344 gives the exact answer, and multiplying by 0.62 is a good estimate.
How many miles is a 5K and a 10K?
In miles, the 5K race distance is about 3.11, the 10K is about 6.21, a half marathon is about 13.11 and a full marathon is about 26.22.
Is a nautical mile the same as a mile?
No. A nautical mile is exactly 1,852 meters, while a statute mile is 1,609.344 meters. This calculator converts between both and shows nautical miles in the result list.
Is 1.609344 an exact number or a rounded one?
It is exact. The mile is defined as 5,280 feet and the foot as exactly 0.3048 meters, so the product is 1,609.344 meters with no rounding.