km to miles

Convert kilometers to miles — or miles to kilometers — instantly, for running, driving and travel.

Runs locally — files never leave your device

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How to use km to miles

1Type a distance in kilometers to see it in miles.
2Or type in the miles box to convert miles to km.
3Copy the result with one click.
4See the chart for race distances and common trips.

Kilometers and miles

Road signs, car dashboards, running apps and maps use kilometers in most countries and miles in the United States and the United Kingdom. This converter changes kilometers into miles and miles into kilometers as you type, so you can understand a race distance, a road sign abroad or a hiking route at a glance.

Conversion factors

From	To	Multiply by
Kilometers	Miles	0.621371
Miles	Kilometers	1.609344
km/h	mph	0.621371
mph	km/h	1.609344

Running distances

Race	Kilometers	Miles
5K	5	3.11
10K	10	6.21
15K	15	9.32
Half marathon	21.0975	13.11
30K	30	18.64
Marathon	42.195	26.22
50K ultra	50	31.07
100K ultra	100	62.14

Speed limits

km/h	mph
30	19
50	31
80	50
100	62
120	75
130	81

Related tools

Convert shorter lengths with feet to meters and cm to inches, or convert speeds, areas and every other unit with the Unit Converter.

Frequently asked questions

How many miles is a kilometer?

One kilometer is 0.621371 miles. One mile is exactly 1.609344 kilometers.

Is there an easy way to convert in my head?

Multiply kilometers by 0.6 for a close estimate (10 km ≈ 6 miles; exact 6.21). Another trick uses the Fibonacci sequence: 5 km ≈ 3 mi, 8 km ≈ 5 mi, 13 km ≈ 8 mi, 21 km ≈ 13 mi.

How do I convert km/h to mph?

Use the same factor — speeds convert exactly like distances. 100 km/h × 0.621 = 62.1 mph, and 70 mph × 1.609 = 112.7 km/h. Type the speed number into the boxes above.

How far is a 5K, a half marathon and a marathon in miles?

A 5K is 3.11 miles, a 10K is 6.21 miles, a half marathon (21.0975 km) is 13.1 miles and a marathon (42.195 km) is 26.2 miles.

Is a nautical mile the same as a mile?

No. A nautical mile, used at sea and in aviation, is 1.852 km — about 15% longer than a regular (statute) mile. Use the Unit Converter for nautical miles.

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