How many miles is a kilometre?

About 0.621371 miles. Going the other way, a mile is about 1.609344 kilometres. Multiplying kilometres by 0.6 is close enough for a mental estimate, but use the tool when the number matters.

How far is a marathon in miles?

42.195 km is about 26.2188 miles, which is where the familiar "26.2" comes from. A half marathon of 21.0975 km is about 13.1094 miles.

UNIT CONVERSION · CALCULATED FROM DEFINITIONS

Kilometres to Miles Converter

Convert km and miles both ways, with running and driving distances.

From

Formulami = km × 0.621371192

Ratio1 km = 0.621371192 mi

Every unit in this category

m1,000Metre

cm100,000Centimetre

mm1,000,000Millimetre

µm1,000,000,000Micrometre

in39,370.0787Inch

ft3,280.8399Foot

yd1,093.6133Yard

mi0.621371192Mile

nmi0.539956803Nautical mile

台尺3,300Taiwanese foot

Common values

km	mi
`0.5 km`	`0.310685596 mi`
`1 km`	`0.621371192 mi`
`2 km`	`1.242742 mi`
`3 km`	`1.864114 mi`
`5 km`	`3.106856 mi`
`10 km`	`6.213712 mi`
`15 km`	`9.320568 mi`
`20 km`	`12.427424 mi`
`25 km`	`15.53428 mi`
`30 km`	`18.641136 mi`
`50 km`	`31.06856 mi`
`75 km`	`46.602839 mi`
`100 km`	`62.137119 mi`
`150 km`	`93.205679 mi`
`200 km`	`124.2742 mi`
`500 km`	`310.6856 mi`
`1000 km`	`621.3712 mi`

About this tool

Enter kilometres to get miles, or type miles to get kilometres; the fields are linked. A mile is exactly 1609.344 metres, which follows from the yard being defined as exactly 0.9144 m. The reference table covers 5K, 10K, half marathon, and marathon distances, along with the speed limits that come up most often.

How it works

Enter a distance in kilometres, or type directly into the miles field.
Use the swap control to reverse the direction.
Check the table for running distances and common speed limits.

Precision and definitions

One mile is defined as exactly 1609.344 metres.

Privacy

Every conversion runs inside this browser. The values you enter are never uploaded, stored, or written to the URL or any log.

Frequently asked questions

How many miles is a kilometre?: About 0.621371 miles. Going the other way, a mile is about 1.609344 kilometres. Multiplying kilometres by 0.6 is close enough for a mental estimate, but use the tool when the number matters.
How far is a marathon in miles?: 42.195 km is about 26.2188 miles, which is where the familiar "26.2" comes from. A half marathon of 21.0975 km is about 13.1094 miles.

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