How to Convert Kilometers to Miles

4 min read•June 1, 2025•Reviewed: June 1, 2026

✓Reviewed by Apex Conversion Editorial Team · Last reviewed June 1, 2026

To convert kilometers to miles, multiply by 0.621371 or divide by 1.609344. Both methods give the same result. For a quick estimate, dividing by 1.6 is accurate within 0.58% — practical for interpreting GPS distances and European road signs.

This conversion is particularly useful for US travelers in metric countries, GPS distances shown in km, and running events described in kilometers.

Step-by-Step Method

Step 1: Identify the kilometer value. Step 2: Multiply by 0.621371 for the exact result, or divide by 1.6 for a fast estimate. Step 3: Round to one decimal place.

Example — Convert 80 km: 80 × 0.621371 = 49.71 mi. Fast estimate: 80 ÷ 1.6 = 50 mi. The estimate is within 0.6% of the exact result.

Worked Examples

GPS shows 25 km to destination:
  25 × 0.621371 = 15.53 mi  (shortcut: 25 ÷ 1.6 = 15.6 mi)

EU speed limit: 120 km/h
  120 × 0.621371 = 74.56 mph  (shortcut: 120 ÷ 1.6 = 75 mph)

Race distance: 5 km
  5 × 0.621371 = 3.107 mi

Long drive: 400 km
  400 × 0.621371 = 248.55 mi  (shortcut: 400 ÷ 1.6 = 250 mi)

Driving Abroad

European GPS devices, road signs, and rental cars display distances in km and speeds in km/h. As a US driver, the most useful conversions to memorize are: 50 km/h = 31 mph (urban limit), 100 km/h = 62 mph (rural), 130 km/h = 81 mph (motorway).

For GPS distances: when your device shows 10 km remaining, that is about 6.2 miles. When it shows 100 km, that is about 62 miles. The rule 'roughly 60% of km' is a useful mental anchor.