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Miles to Kilometres Converter

Convert a distance in miles (mi) to kilometres (km) using the exact international mile.

miles

Results

Kilometres

160.934 km

Kilometres: 160.934 kilometres.

Formula

Kilometres
= miles × 1.609344

One international mile is exactly 1.609344 km.

Worked example

A route planner says your journey is 100 miles. How far is that in kilometres?

  1. Step 1: Convert to kilometres

    100 × 1.609344 = 160.934 km

100 miles is 160.934 kilometres.

Miles to kilometres table

Common distances, rounded to three decimal places:

  • 1 mi = 1.609 km
  • 5 mi = 8.047 km
  • 10 mi = 16.093 km
  • 13.1 mi = 21.082 km
  • 26.2 mi = 42.165 km
  • 50 mi = 80.467 km
  • 100 mi = 160.934 km
  • 500 mi = 804.672 km
  • 1,000 mi = 1,609.344 km

Converting in your head

Multiply by 1.6 (or by 8, then divide by 5). The answer is about 0.6% below the exact value: 50 miles is roughly 80 km, and exactly 80.467 km.

Frequently asked questions

How many kilometres are in a mile?

One mile is exactly 1.609344 kilometres.

Why is a mile exactly 1.609344 km?

The international yard is defined as exactly 0.9144 metres, and a mile is 1,760 yards, so a mile is exactly 1,609.344 metres.

Can I use this to convert mph to km/h?

Yes. Speed conversion uses the same factor, so 30 mph is 48.28 km/h and 70 mph is 112.654 km/h.

Does this convert nautical miles?

No. This converter uses the ordinary (statute) mile used on road signs. A nautical mile is a different unit of exactly 1.852 km.

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