Illustration of 1 mile with an arrow to 1.609344 kilometers

Calculators & everyday math

Miles vs. Kilometers: Converting Distances

Road trips, running races, and maps switch between miles and kilometers depending on where you are. The conversion is a single exact factor, and a couple of mental shortcuts get you close enough on the move. This guide covers both.

Ready to try the tool this guide describes?

The exact relationship

1 mile is exactly 1.609344 kilometers, and 1 kilometer is about 0.6213711922 miles. To convert miles to kilometers, multiply by 1.609344; to go the other way, divide by it.

Quick mental conversions

  • Miles to kilometers: multiply by 1.6. 50 miles is about 80 km (exactly 80.4672).
  • Kilometers to miles: multiply by 0.6, or take five eighths. 100 km is about 62.5 miles (exactly 62.13711922).
  • Neighboring Fibonacci numbers work too: 5 miles is about 8 km, and 8 miles is about 13 km (exactly 12.874752).

Race distances

Race distances comparison
RaceKilometersMiles
5K53.106855961
10K106.213711922
Half marathon21.097513.10937873
Marathon42.19526.21875746

Nautical miles are different

At sea and in the air, distances use the nautical mile of exactly 1,852 meters — about 1.150779448 ordinary miles. It is a separate unit, not another name for the mile.

Miles vs. Kilometers FAQ

How many kilometers are in a mile?
Exactly 1.609344.
How many miles are in a kilometer?
About 0.6213711922.
Is a 5K race 3 miles?
A little more: 5 kilometers is about 3.1 miles (3.106855961).
How long is a marathon in miles?
A marathon is 42.195 km, which is about 26.2 miles (26.21875746).
Which countries use miles on road signs?
The United States and the United Kingdom are the best-known examples. Most other countries use kilometers.

Related guides

Open the tool

Jump into Length Converter when you are ready to process your files.

← Back to all guides

More from Looty

Explore Looty’s Ecosystem

Discover more ways Looty can help you learn, organize, create, and make an impact.