Km to miles converter

miles = km × 0.621371 and km = miles × 1.609344.

The mile is defined as exactly 1,609.344 meters. A handy shortcut: multiply kilometers by 0.6, or use Fibonacci numbers (5 km ≈ 3 mi, 8 km ≈ 5 mi, 13 km ≈ 8 mi).

Race names use metric distances even in the US, so a "5K fun run" is a little over 3 miles and a "10K" a little over 6. Track events are metric too: the 1,600 m race run in many US high schools is 9.3 m shorter than a true mile (1,609.344 m). If you train by the mile and race by the kilometer, convert your goal pace before race day so your watch splits make sense.

Pace is time per distance, so the conversion runs the other way: a pace per kilometer is shorter than the same pace per mile.

• min/mile = min/km × 1.609344
• min/km = min/mile ÷ 1.609344

Enter the pace in decimal minutes: 5:30 per km is 5.5. For example, 5:00 min/km is about 8:03 min/mile, and a 10:00 min/mile pace is about 6:13 min/km.

The Speed tab converts km/h, mph, meters per second and knots. 100 km/h is 62.1 mph; 65 mph is 104.6 km/h.

The Distance tab also includes the nautical mile (1,852 m, about 1.15 statute miles) used at sea and in aviation. A knot is one nautical mile per hour. For road speeds only, the mph to km/h converter has a speed limit chart.

In Canada, Mexico and most of Europe, road signs show distances in kilometers. If a sign says the next town is 80 km away, that's about 50 miles. Fuel economy is also measured differently: many countries use liters per 100 km instead of miles per gallon, so a lower number is better. A car that does 30 mpg (US) uses about 7.8 L/100 km.

GPS apps and running watches let you switch between miles and kilometers, but race bibs, trail markers and foreign maps don't, so it helps to have a converter handy. Everything here runs in your browser; nothing is uploaded.

The factor 1.609344 is exact, so the only rounding happens when the result is displayed. Choose 0 to 8 decimal places. Two decimals is plenty for running and driving distances; surveyors and pilots may want more.