Convert km to Miles
Convert kilometers to miles instantly — exact factors, common-value table, nothing uploaded.
Common conversions
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Kilometers to miles, from road signs to race results
Driving in Europe, running a 5K, cycling tour stages — distances come in kilometers, but road trips in the US and a lot of running lore are in miles. The exact relationship: 1 mile = 1.609344 km, so 1 km = 0.621371 mi.
This page presets the converter to kilometers → miles. Type 10 and you get 6.2137 mi — the reason a 10K race is described as “about 6.2 miles”. Type 100 and you get 62.1371, handy when a European road sign needs translating for an American passenger.
Everything is computed in your browser as you type, with no upload and no cap on how many conversions you run. The quick table below anchors the values that matter for driving and racing.
Quick conversion table
Common values at a glance — computed locally with exact standard factors.
| Value (km) | Converted (mi) |
|---|---|
| 1 | 0.621371 |
| 2 | 1.24274 |
| 5 | 3.10686 |
| 10 | 6.21371 |
| 25 | 15.5343 |
| 50 | 31.0686 |
| 100 | 62.1371 |
How to convert km to miles
Type the distance in km
Whole numbers or decimals — 5 for a parkrun, 421.95 for a marathon.
Read the result in miles
Exact division by 1.609344, shown to six significant digits.
Flip for the other direction
The swap button turns this into miles-to-km instantly.
FAQs about this conversion
How many miles is 5 km?
5 km = 3.1069 mi. That is why the standard road-race ladder reads 5K = 3.1 mi, 10K = 6.2 mi, marathon = 26.2 mi.
What is the fastest mental trick?
Multiply by 0.6, then add a bit more for precision — or use the “Fibonacci” coincidence: 5 mi ≈ 8 km, 8 mi ≈ 13 km. The converter gives the exact figure either way.
Is a nautical mile the same?
No. A nautical mile is 1,852 m, about 15% longer than the statute mile used here for road distances.
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