Convert miles and kilometres instantly. This free miles to km converter switches either direction using the exact factor (1 mile = 1.609344 km), with metres and a quick conversion table.
Convert
mi
Enter a distance and choose the direction. One mile equals exactly 1.609344 kilometres, so the conversion is exact (not an approximation).
Kilometres
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Enter a distance
Miles
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Kilometres
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Metres
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Approx
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A quick mental shortcut: multiply miles by 1.6 for km, or by about 8/5. To go the other way, multiply km by 0.62 (roughly 5/8) for miles.
Use this free miles to km converter to switch between miles and kilometres in either direction. Enter a distance and get an exact conversion instantly.
What this miles to km converter does
A miles to km converter changes a distance between miles and kilometres. One mile equals exactly 1.609344 km, so the result is precise, and the tool also shows metres.
Miles and kilometres formula
kilometres = miles × 1.609344
miles = kilometres ÷ 1.609344
So 5 miles = 8.05 km and 10 km = 6.21 miles. A quick estimate: multiply miles by 1.6, or km by 0.62.
Common distance conversions
Miles
Kilometres
1
1.61
5
8.05
10
16.09
26.2 (marathon)
42.16
62.14
100
The 5/8 shortcut
Miles and kilometres sit close to a 5 : 8 ratio — 5 miles ≈ 8 km. To go from miles to km multiply by 8/5 (1.6); to go from km to miles multiply by 5/8 (0.625). Great for quick mental estimates while travelling.
