How to Convert Miles to Kilometers (Formula, Table & Examples)

To convert miles to kilometers, multiply the number of miles by 1.609344. For example, 10 miles × 1.609344 = 16.09 km. To go the other way, divide kilometers by 1.609344 to get miles.

The formula

• km = miles × 1.609344
• miles = km ÷ 1.609344

One mile is a bit over one and a half kilometers, so a quick estimate is "add roughly 60%".

Quick reference

• 1 mi = 1.61 km
• 3 mi = 4.83 km
• 5 mi = 8.05 km
• 10 mi = 16.09 km
• 26.2 mi = 42.16 km (a marathon)
• 60 mph = 96.6 km/h
• 100 mi = 160.93 km

Where it matters

• Running: a 5K is 3.1 miles and a 10K is 6.2 miles.
• Driving: speed limits and odometers differ between the US/UK and metric countries.
• Travel: map distances and fuel economy switch units across borders.

Do it instantly

The unit converter does miles ↔ km (plus meters, feet and speed units like mph ↔ km/h) with live two-way updates, in your browser. Related: How to convert kg to lbs.