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KM to miles converter

Convert kilometers to miles instantly (and back) with the exact 0.62137119 factor — race distances, pace math, and rental-car odometers.

1 km = 0.62137119 mi

1 km = 0.62137119 mi · multiply by 0.62137119

Conversions run instantly on your device — nothing is sent anywhere.

Maintained by ToolsNexus

Convert kilometers to miles — and back — with the exact factor (1 km = 0.62137119 mi, the reciprocal of the defined 1.609344). Loads with km → mi preselected: for race names, pace math, and metric odometers read in miles. (Planning in miles first? The miles to km converter starts reversed and has the Fibonacci trick.)

The formula

miles = km × 0.62137119 · km = miles × 1.609344. The reverse factor is exact; the forward one is its unending reciprocal — the converter shows both directions’ multipliers.

Common values

km miles km miles
1 0.62 50 31.07
5 3.11 100 62.14
10 6.21 160.9 99.98
21.0975 13.11 200 124.27
42.195 26.22 400 248.55

Races, pace, range

Running owns this direction: the 5K/10K names are kilometers, and the FAQ converts the pace-per-km numbers your watch shows into min/mile. Driving: metric odometers, EV range figures, and toll distances read in miles via the 60%-and-a-bit rule; fuel economy needs the inverted formula in the FAQ (mpg and L/100 km move in opposite directions). Speeds are their own pages — km/h to mph for reading foreign limits, mph to km/h for US roads.

Private by design

Runs on your device as you type — no server, no logging. The unit converter adds nautical miles for the boat.

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Frequently asked questions

What is the exact km to miles formula?
Multiply kilometers by 0.62137119 (precisely: divide by 1.609344, the exact definition of the mile in kilometers). So 10 km = 6.21 miles. The "multiply by 0.6" habit runs 3.4% short — 21 km is 13.05 miles, not 12.6.
How far is a 5K and a 10K in miles?
A 5K is 3.11 miles and a 10K is 6.21 miles. The half marathon (21.0975 km) is 13.11 miles; the marathon (42.195 km) is 26.22 miles. Race names are metric worldwide — even in the US, where the training runs around them are logged in miles.
How does pace per km convert to pace per mile?
Multiply the per-km pace by 1.609: a 5:00 min/km runner is running 8:03 min/mile; 6:00 min/km is 9:39 min/mile; 4:00 min/km is 6:26 min/mile. (Pace converts opposite to speed — a longer unit takes proportionally longer.)
My car shows kilometers — how do I read it in miles?
Roughly: take 60% and add a pinch. A 240 km trip is 149 miles; 100 km of range is 62 miles. For fuel economy, 1 L/100 km equals 235.2 ÷ (L/100 km) mpg-US — so 8 L/100 km ≈ 29.4 mpg.

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