KM to Miles Converter
Change kilometres to miles, with the working shown. A mile is exactly 1.609344 km, so divide by 1.609344.
km to mi
≈ 6.21371 mi
10 kilometres is about 6.21371 miles.
The same amount in other units
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Why does this work?
All steps as text
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How to convert km to miles
Divide the kilometres by 1.609344. For a 10K race: 10 ÷ 1.609344 ≈ 6.21371 miles. That is the same as multiplying by about 0.621371.
A quick estimate: multiply by 6 and divide by 10. 10 km → 6 miles, and the real answer is a little more. Neighbouring Fibonacci numbers work too: 8 km ≈ 5 miles, 13 km ≈ 8 miles.
KM to miles chart
| Kilometres | Miles | Example |
|---|---|---|
| 1 km | 0.6214 mi | |
| 3 km | 1.8641 mi | |
| 5 km | 3.1069 mi | a 5K race |
| 8 km | 4.971 mi | |
| 10 km | 6.2137 mi | a 10K race |
| 15 km | 9.3206 mi | |
| 20 km | 12.4274 mi | |
| 21.0975 km | 13.1094 mi | a half marathon |
| 25 km | 15.5343 mi | |
| 30 km | 18.6411 mi | |
| 42.195 km | 26.2188 mi | a marathon |
| 50 km | 31.0686 mi | |
| 80 km | 49.7097 mi | |
| 100 km | 62.1371 mi | |
| 160 km | 99.4194 mi |
Miles rounded to 4 decimal places.
Questions
How many miles is a 5K?
About 3.1069 miles: 5 ÷ 1.609344 ≈ 3.10686.
How many miles is a marathon?
A marathon is 42.195 km, about 26.2188 miles.
How do I convert km/h to mph?
Divide by 1.609344 the same way: 100 km/h ≈ 62.14 mph. The speed calculator shows speeds in both.
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