How to convert km to miles
- 1 Type a value in the kilometres box; the miles appear as you type.
- 2 Or type in the miles box to convert the other way.
- 3 Use the conversion table below for common values, or copy the result.
Race distances in miles
Running races are set in kilometres, so runners often convert to miles to compare with training plans: a 5K is 3.1 miles, a 10K 6.2 miles, a half marathon 13.1 miles and a marathon 26.2 miles.
Need the other direction? Use Miles to KM. Converting fuel volumes for a road trip? Use Liters to Gallons.
- Speed cameras and limits follow the local unit, so know which one your speedometer's main scale shows.
- Fitness apps may round kilometres, so small differences from a converted figure are normal.
- For quick sums, 8 km is almost exactly 5 miles.
- Running shoes are often replaced every 500 to 800 km, which is roughly 300 to 500 miles of running.
Features
Race distances
5K, 10K, half marathon (21.0975 km) and marathon (42.195 km) in the chart.
Two-way
Type miles to get kilometres.
Exact
Uses the international mile of 1.609344 km.
When to use it
Running and cycling apps
A 10K run is 6.21 miles; a 100 km cycle ride is 62.1 miles. Converting heights for a hilly route? Use Meters to Feet.
Speed
100 km/h is 62.1 mph, and 120 km/h is 74.6 mph.
Travel
Lahore to Islamabad is about 375 km by motorway, or 233 miles. Converting miles back? See Miles to KM.
Cycling and hiking
Trail signs abroad are in kilometres; a 12 km hike is 7.46 miles. Convert before planning water and daylight for the route.
Related Unit tasks
Frequently asked questions
How do I convert km to miles?
Divide kilometres by 1.609344, or multiply by 0.621371. 25 km × 0.621371 = 15.53 miles.
How many miles is 1 km?
1 km is 0.6214 miles.
How many miles is 5 km?
5 km is 3.107 miles, which is why a 5K race is often called a 3.1 mile run.
Is there a quick way to estimate?
Multiply by 5 and divide by 8. 40 km × 5 ÷ 8 = 25 miles; the exact answer is 24.85 miles.
How many miles is 10 km?
10 km is 6.214 miles.
How do I convert km/h to mph?
Multiply by 0.621371. 80 km/h is 49.7 mph.
How many miles is 42 km?
42 km is 26.1 miles; a full marathon of 42.195 km is 26.22 miles.
How many miles is 21 km?
21 km is 13.05 miles; a half marathon of 21.0975 km is 13.11 miles.
How many miles is 100 km?
100 km is 62.14 miles.
Are kilometres on road signs exact?
Signs are rounded to the nearest whole kilometre or mile, so a converted figure may differ slightly from the sign in the other unit.
Why are race distances in kilometres?
Most road races around the world are set in kilometres, such as the five and ten kilometre races, while American runners often think in miles, so converting helps compare times.
Can I convert speed limits?
Yes. The same factor turns kilometres per hour into miles per hour. Hire cars abroad often have both scales on the speedometer, but the main numbers follow the country you are in.
Why does my car show both?
Cars sold in several markets often print both scales on the speedometer, with the main one matching the country's road signs and the smaller one for visitors.
Which unit is better for training?
Neither is better; consistency matters most. Pick the unit your race and training plan use, and set your watch or phone to it so you are not converting during every run.
Built and reviewed by Hamza Farooq, founder and lead developer
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