Contents
How the kilometres to miles converter works
Type a distance in the kilometre field and the matching number of miles appears at once. You can also edit the miles field, swap the sides or choose another common length unit.
Three distances worth recognising
5 km is 3.106856 miles. That is useful when a 5K route is described to someone who normally reads distances in miles.
42.195 km is 26.218757 miles. The official marathon distance is the familiar 26.2 miles only after rounding.
100 km is 62.137119 miles. This round metric distance makes a convenient road-trip reference.
The calculation behind the answer
An international statute mile is exactly 1.609344 kilometres, so kilometres are divided by 1.609344. The same relationship is listed in the NIST conversion tables.
The converter calculates with the exact factor and limits the visible result to six decimal places. Typing into the miles side performs the inverse operation automatically.
Road miles, nautical miles and sensible rounding
- For roads, running and everyday land distances, choose miles, not nautical miles.
- A nautical mile equals 1.852 km and therefore gives a different answer.
- Multiplying kilometres by 0.62 is handy for a rough mental estimate, not a precise specification.
Do not report more precision than the original distance supports. A route measured only to the nearest kilometre does not become millimetre-accurate after conversion.
Common questions about kilometres and miles
Most practical questions concern the factor, direction and type of mile.
How many miles are in one kilometre?
One kilometre is approximately 0.621371 miles.
How do I convert kilometres to miles without a calculator?
For a quick estimate, multiply kilometres by 0.62. Divide by 1.609344 when you need the exact relationship.
Is 5 km the same as 3 miles?
It is close, but 5 kilometres equals about 3.106856 miles.
Does this use statute miles or nautical miles?
It uses international statute miles, the unit normally used for roads and land distances.
Can I convert miles back to kilometres here?
Yes. Enter a number in the miles field or swap the two units; the kilometre value updates immediately.
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