Kilometers to Miles (km to miles)

How to convert kilometers to miles

Divide the kilometers by 1.609344:

miles = kilometers ÷ 1.609344

100 km ÷ 1.609344 = 62.137 miles, or 62.14 mi. Multiplying by 0.621371 gives the same answer to six digits. To go the other way, multiply miles by 1.609344 — the miles to kilometers converter does that with its own table.

The factor is exact: since 1959 the mile has been defined as 1,760 yards of exactly 0.9144 m, which is 1,609.344 m. The result also shows the distance in meters and feet; for meters alone, see kilometers to meters, and for track distances in meters, meters to miles.

Race distances in miles

Training logs and watches often switch between units; paste a column of distances into Convert a list of values to convert a whole week or season at once and download it as CSV.

Kilometers to miles chart

Road signs in Canada and Mexico show distances in kilometers, and car rental agreements abroad count kilometers. Speed limits are in kilometers per hour — for those, use km/h to mph.

Miles and kilometers on the road

A few distances drivers and travelers run into:

• Canada: highway limits of 100 km/h are 62 mph, and a sign reading Toronto 160 km means just under 100 miles.
• Car rentals abroad include a daily allowance in kilometers; 300 km a day is about 186 miles.
• Fuel economy abroad is given in liters per 100 km, which is not a distance conversion — 8 L/100 km is about 29.4 miles per U.S. gallon.

Quick ways to estimate

There is also a neat trick with Fibonacci numbers (1, 2, 3, 5, 8, 13, 21, 34, 55, 89): each number in kilometers is close to the previous one in miles. 8 km ≈ 5 mi, 13 km ≈ 8 mi, 89 km ≈ 55 mi. It works because the ratio between neighbouring Fibonacci numbers, about 1.618, is close to 1.609.