How do you convert miles to kilometers?

To convert miles to kilometers, multiply by 1.609344. For example, 40 mi is 64.37376 km.

How many kilometers are in a mile?

There are 1.609344 kilometers in one mile.

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Converters · Length

40 Miles to Kilometers

40 mi =

64.37376 km

40 miles equals 64.37376 kilometers

How to convert miles to kilometers

To get kilometers, multiply by 1.609344.

km = mi × 1.609344

Worked example: 40 × 1.609344 = 64.37376 km.

Going the other way, multiply by 0.6213711922 — one kilometer is 0.6213711922 miles.

Values near 40 mi

Mile	Kilometer
20 mi	32.18688 km
38 mi	61.155072 km
39 mi	62.764416 km
41 mi	65.983104 km
42 mi	67.592448 km
80 mi	128.74752 km

Mile to Kilometer — common values

Mile	Kilometer
1 mi	1.609344 km
2 mi	3.218688 km
3 mi	4.828032 km
5 mi	8.04672 km
10 mi	16.09344 km
25 mi	40.2336 km
50 mi	80.4672 km
100 mi	160.9344 km

Convert Mile to other units

mi → m mi → km mi → cm mi → mm mi → yd mi → ft mi → in mi → nmi

← Reverse: Kilometer to Mile

Questions

How do you convert miles to kilometers?: To convert miles to kilometers, multiply by 1.609344. For example, 40 mi is 64.37376 km.
How many kilometers are in a mile?: There are 1.609344 kilometers in one mile.
How do you convert kilometers back to miles?: Go the other way: multiply by 0.6213711922. One kilometer is 0.6213711922 miles.

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