km to Miles Converter
Convert distance between kilometres and miles. Type in either side.
About this tool
Uses the exact definition 1 mile = 1.609344 km, so 1 km is about 0.6214 miles. Miles are shown to three decimal places.
Running races, road signs and car specifications switch between kilometres and miles depending on the country. Type a distance in kilometres to see miles, metres and feet, or type miles to get kilometres. Both boxes update as you type.
How to use the km to Miles Converter
- Type a distance in kilometres, for example 10.
- Read the miles next to it, and the metres and feet below.
- Or type miles instead, and the kilometres update.
- Decimals work for race distances such as 21.0975.
Race distances
A 10 km race is 10 ÷ 1.609344 = 6.214 miles. A half marathon is 21.0975 km, which is 13.109 miles, and a marathon is 42.195 km, or 26.219 miles. A 5 km parkrun is 3.107 miles.
How the mile is defined
The international mile is exactly 1.609344 km, or 5 280 feet. To convert kilometres to miles, divide by 1.609344 (or multiply by about 0.6214); to convert miles to kilometres, multiply by 1.609344. A quick estimate is that 5 miles is about 8 km.
Frequently asked questions
How many miles is 5 km?
About 3.107 miles.
How many km is a mile?
Exactly 1.609344 km.
How many miles is a marathon?
42.195 km is 26.219 miles, usually quoted as 26.2.
Is a nautical mile the same?
No. A nautical mile is 1.852 km, used at sea and in aviation.