Convert Kilometers to Miles

Instantly convert kilometers (km) to miles (mi). Enter a value to see the result and the conversion formula.

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How our Kilometers to Miles unit converter works

To ensure maximum accuracy when converting Kilometers to Miles, our calculator uses a scientific pivot method. Instead of relying on a potentially inaccurate direct conversion, the system first converts km into the base unit of the International System (the meter), then recalculates the result into mi. This approach drastically reduces rounding errors.

About this conversion

The Canada-US border is the longest in the world. Drivers must immediately adapt: Canada signs are in km, US signs in miles.

When to use this conversion

Vital for cross-border road trips (e.g., Toronto to New York) to gauge remaining distance and estimate arrival times on US highways.

Formula

Miles (mi) = Kilometers (km) × 0.621371

Tip: You can swap units and convert decimals. Results are rounded for readability.

Examples

Kilometers (km) Miles (mi)
1 km 0.621371 mi
2 km 1.242742 mi
5 km 3.106855 mi
10 km 6.21371 mi
20 km 12.42742 mi
50 km 31.06855 mi
100 km 62.1371 mi
250 km 155.34275 mi
500 km 310.6855 mi
1000 km 621.371 mi

FAQ

How many miles is a 5K run?

A 5-kilometer charity run is equal to 3.1 miles.

How far is Toronto from New York?

The driving distance is about 790 km, which is roughly 490 miles.