By Tim King · Updated 19 September 2026

km to Miles and Miles to km Converter

Miles in a Kilometre, Kilometres in a Mile, With Worked Examples

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kilometres to miles formula

miles = km ÷ 1.609344

1 kilometre = 0.6213711922 miles, so multiply kilometres by 0.6213711922. Going the other way, 1 mile = 1.609344 kilometres.

kilometres to miles table

kilometres (km)	miles (mi)
1	0.621371
2	1.24274
3	1.86411
4	2.48548
5	3.10686
6	3.72823
7	4.3496
8	4.97097
9	5.59234
10	6.21371
15	9.32057
20	12.4274
21.1	13.1109
25	15.5343
30	18.6411
40	24.8548
42.2	26.2219
50	31.0686
60	37.2823
80	49.7097
100	62.1371
150	93.2057
200	124.274
300	186.411
500	310.686
1,000	621.371

How many miles in kilometres?

1 km = 0.621371 mi. There are 0.621371 miles in 1 kilometres.

5 km = 3.10686 mi. There are 3.10686 miles in 5 kilometres.

10 km = 6.21371 mi. There are 6.21371 miles in 10 kilometres.

42.195 km = 26.2188 mi. There are 26.2188 miles in 42.195 kilometres.

100 km = 62.1371 mi. There are 62.1371 miles in 100 kilometres.

miles to kilometres formula

km = miles × 1.609344

1 mile = 1.609344 kilometres, so multiply miles by 1.609344, or divide by 0.6213711922.

miles to kilometres table

miles (mi)	kilometres (km)
1	1.60934
2	3.21869
3	4.82803
4	6.43738
5	8.04672
6	9.65606
7	11.2654
8	12.8748
9	14.4841
10	16.0934
13.1	21.0824
15	24.1402
20	32.1869
25	40.2336
26.2	42.1648
30	48.2803
40	64.3738
50	80.4672
60	96.5606
70	112.654
80	128.748
100	160.934
150	241.402
200	321.869
300	482.803
500	804.672

How many kilometres in miles?

1 mi = 1.60934 km. There are 1.60934 kilometres in 1 miles.

5 mi = 8.04672 km. There are 8.04672 kilometres in 5 miles.

10 mi = 16.0934 km. There are 16.0934 kilometres in 10 miles.

26.2 mi = 42.1648 km. There are 42.1648 kilometres in 26.2 miles.

100 mi = 160.934 km. There are 160.934 kilometres in 100 miles.

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How the Km To Miles works

This km to miles converter uses the exact international mile. Type a distance in kilometres and get miles as you type. A kilometre is 0.621371 miles, the reciprocal of the exact 1.609344 km mile. The reference table covers race distances, speed limits and the round-number road distances that come up when driving abroad. Press the swap button to go the other way.

Km to miles: the factor and where it comes from

A mile is exactly 1,609.344 metres, so a kilometre is 1,000 ÷ 1,609.344 = 0.62137119 miles. Unlike the miles-to-km direction, the decimal does not terminate, and this page shows it to ten significant figures. For estimates, five-eighths — 0.625 — is within 0.6% and much easier to use.

Worked example: a 10K race

10 × 0.621371 = 6.21 miles. A 5K is 3.11 miles, a half marathon of 21.0975 km is 13.11 miles and a full marathon of 42.195 km is 26.22 miles. If your watch records in kilometres and the race is described in miles, the extra 0.11 mile on a 10K is about 175 m — a noticeable gap if you stop when the watch says six miles.

Worked example: a 100 km/h speed limit

Speed converts with the same factor, so 100 km/h is 62.1 mph, 120 km/h is 74.6 mph and 130 km/h is 80.8 mph. A 50 km/h urban limit is 31.1 mph. Hire cars in metric countries have speedometers in km/h with small mph figures inside; the conversion here is what those inner figures are showing.

Fuel economy is not a plain conversion

Litres per 100 km cannot be converted to mpg with this factor alone, because the gallon also differs and the ratio is inverted. As a guide, 6 L/100 km is 47 mpg imperial or 39 mpg US; 8 L/100 km is 35 mpg imperial or 29 mpg US. Use a dedicated fuel economy tool for anything precise — this page is for distance.

Estimating five-eighths

Divide by eight and multiply by five: 80 km is 10 × 5 = 50 miles (exact: 49.7). 200 km is 25 × 5 = 125 miles (exact: 124.3). Or halve the kilometres and add a quarter of that: 80 km is 40 + 10 = 50. Both give the same estimate; use whichever is easier with the number in front of you.

Distances that are round in one system only

Road signs in metric countries use round kilometre figures that become awkward in miles: 300 km is 186 miles, 500 km is 311 miles. The reverse is also true, which is why the Paris–Brest–Paris cycle ride is 1,200 km and the Land's End to John o'Groats route is about 874 miles, and neither converts into anything tidy.

Worked example: a marathon

The marathon distance is defined in metric as 42.195 km, but is usually described as 26.2 miles. 26.2 × 1.609344 = 42.165 km, which is 30 metres short of the real course — the true figure is 26.219 miles. A half marathon of 13.1 miles is 21.08 km against the defined 21.0975 km. If a training plan gives distances in miles, the small error does not matter; if you are measuring a course, use the metric definition.

Worked example: a 300-mile drive

300 × 1.609344 = 482.8 km. At a French motorway limit of 130 km/h that is about 3 hours 43 minutes of driving; at the UK's 70 mph, which is 112.65 km/h, the same distance takes 4 hours 17 minutes. Fuel economy converts the other way round: a car doing 40 mpg (imperial) uses 7.06 litres per 100 km, and the miles-to-km factor is only part of that sum, because the gallon changes too.

Kilometre to miles formula and table

The formula on this page is miles = km ÷ 1.609344, applied exactly before rounding for display.

How many miles in 1 kilometre? 1 km is 0.6214 mi. Likewise 5 km is 3.1069 mi, 10 km is 6.2137 mi, 42.2 km is 26.22 mi.

Kilometre to mile conversion table

Kilometres (km)	Miles (mi)
1	0.6214
2	1.2427
3	1.8641
4	2.4855
5	3.1069
6	3.7282
7	4.3496
8	4.971
9	5.5923
10	6.2137
15	9.3206
20	12.43
21.1	13.11
25	15.53
30	18.64
40	24.85
42.2	26.22
50	31.07
60	37.28
80	49.71
100	62.14
150	93.21
200	124.27
300	186.41
500	310.69
1,000	621.37

FAQ

How many miles are in a kilometre?

One kilometre is 0.621371 miles, which is exactly 1,000 ÷ 1,609.344. A kilometre is a little under two-thirds of a mile, or about five-eighths for mental arithmetic.

How do I convert km to miles quickly?

Multiply by five and divide by eight, or take sixty percent and add a bit. For 40 km, five-eighths is 25 miles and the exact answer is 24.85 miles. The five-eighths estimate is half a percent high.

How far is a 5K in miles?

A 5K is 3.107 miles, which runners round to 3.1. A 10K is 6.214 miles, a half marathon is 13.109 miles and a marathon is 26.219 miles, from the metric definitions of 21.0975 km and 42.195 km.

Is 100 km/h the same as 60 mph?

Not quite. 100 km/h is 62.14 mph, so a car doing 100 km/h is slightly faster than one doing 60 mph. The two are close enough that many drivers treat them as equivalent, but the difference is about 3.5 km/h.

How many kilometres are in a mile?

Exactly 1.609344 kilometres. A mile is 5,280 feet and a foot is 0.3048 metres by definition, so the product is exact and every conversion on this page is exact too.