Convert Miles to Kilometers

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

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Quickly convert units of weight, volume, length, temperature, area, data, speed and time. Results update instantly as you type.

How our Miles to Kilometers unit converter works

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

About this conversion

Americans driving north into Canada must mentally switch from miles to kilometers to avoid confusion on the Trans-Canada Highway.

When to use this conversion

Crucial for American tourists navigating Canadian geography, planning hiking routes, or understanding distance markers in National Parks.

Formula

Kilometers (km) = Miles (mi) × 1.60934

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

Examples

Miles (mi) Kilometers (km)
1 mi 1.60934 km
2 mi 3.21868 km
5 mi 8.0467 km
10 mi 16.0934 km
20 mi 32.1868 km
50 mi 80.467 km
100 mi 160.934 km
250 mi 402.335 km
500 mi 804.67 km
1000 mi 1609.34 km

FAQ

How long is a marathon in kilometers?

A full marathon is exactly 26.2 miles, which translates to 42.195 kilometers.

Why does my GPS take longer on US roads?

Speed limits in miles per hour can alter your perception of distance. Always check the estimated arrival time, not just the distance.