Convert km to miles

Kilometer

A kilometer is a metric unit of length equal to 1,000 meters.

Kilometers became widely used through the metric system as a practical unit for roads, maps, and longer distances.

Mile

A mile is a customary and imperial length unit equal to 5,280 feet.

Miles have long been used for land travel distances and remain common in several English-speaking countries.

How to Convert Kilometer to Mile

Mathematically, mile (mi) = kilometer (km) multiplied by the conversion factor shown below.

1 km = 0.621371 mi

1 mi = 1.609344 km

1 km x 0.621371 = 0.621371 mi

The distance in mile (mi) is the distance in kilometer (km) multiplied by 0.621371.

distance_(mi) = distance_(km) x 0.621371

Or:

mi = km x 0.621371

Formula: value × 0.621371192237

Example: 15 km = 9.320568 mi

1. Start with the distance in kilometers (km).
2. Multiply by 0.621371192237 to convert kilometers into miles.
3. Round the result based on the use case: fewer decimals for travel, more decimals for records or calculations.

Precision note: Use the full factor for calculations, then round the displayed mile value only after the conversion is complete.

How many km in mi and mi in km

1 km = 0.621371 mi

1 mi = 1.609344 km

If you are starting with mile instead, use the miles to km page.

Common Use Cases for km to mi

• Comparing road or route distances between metric and mile-based countries.
• Converting race distances, cycling routes, hikes, and walking goals.
• Reading international travel information in a familiar distance unit.
• Preparing reports where an audience expects miles instead of kilometers.

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