Convert miles to km

1 mile equals 1.609344 kilometers. Enter a value below to convert instantly.

Miles to kilometres converts US and UK distances into the unit used by almost every other road network, GPS system and race calendar. The factor of 1.609344 is exact, following from the exact definition of the yard.

Value

From

1 mi

1.609344 km

Multiply the number of miles by 1.609344 to get kilometers. How this is calculated

Decimals

Need the other direction? Convert kilometer to mile →

Formula

Multiply the number of miles by 1.609344 to get kilometers.

Step by step

Start with 1 mi.
Multiply by the conversion factor 1.609344.
1 × 1.609344 = 1.609344 km.

Miles to Kilometers conversion table

Conversion table from Miles to Kilometers
Miles (mi)	Kilometers (km)
1	1.609344
2	3.218688
3	4.828032
5	8.04672
10	16.09344
20	32.18688
50	80.4672
100	160.9344
500	804.672
1,000	1,609.344

Where miles and kilometers are used together

Driving abroad

A speed limit sign reading 100 is 62 mph in a metric country and 161 km/h in an Imperial one — the same number means very different things. Rental car dashboards often show both scales, with the secondary one in smaller print.

Running and cycling events

A 5K is 3.11 miles, a 10K is 6.21 miles and a marathon is 42.195 km or 26.219 miles. Training plans and race distances routinely mix the two, and pace conversion is a separate step again.

Fuel range and trip planning

A car quoting 500 miles of range has about 805 km. Mapping apps show whichever unit the phone locale is set to, so a route planned at home and driven abroad can present two different numbers for the same trip.

Aviation and marine distances

Charts use nautical miles, which are neither of these units. Converting a 100 km leg gives 62.1 statute miles but 54.0 nautical miles — a 15% difference that matters for fuel planning.

Everyday miles worth knowing

Values people actually look up, with the reason each one comes up. Every figure is calculated with the same engine as the converter above.

Mile (mi)	Kilometer (km)	What it is
1	1.609344	The base conversion
3.10686	5.0000065	A 5K in miles
5	8.04672	A short commute
13.1094	21.097534	A half marathon in miles
26.2188	42.195068	A marathon in miles
50	80.4672	A day trip
100	160.9344	A round distance
500	804.672	A long-haul drive

How these two units are defined

A kilometre is a thousand metres. The international mile is 5,280 feet, which works out to exactly 1,609.344 metres — again a consequence of the 1959 yard definition rather than an independent measurement. The nautical mile is a different unit entirely: exactly 1,852 m, defined from a minute of latitude, and used for sea and air navigation. Road distances are never in nautical miles, so if a figure is labelled just 'miles' in a driving context it is the 1,609.344 m statute mile.

Rounding and precision

1.609344 km per mile is exact, so precision is only limited by the distance you started with. Road distances are rounded to the nearest kilometre or mile anyway, so one decimal place is almost always enough — quoting a 5 km run as 3.1069 miles suggests a survey-grade measurement of a route that was probably estimated by GPS to within a few metres.

Mistakes people make with this conversion

Confusing statute miles with nautical miles

A nautical mile is 1,852 m — about 15% longer than a statute mile. Marine and aviation distances, and knots as a speed, all use the nautical mile.
Converting distance when you needed speed

Converting km to miles does not convert km/h to mph on its own if you also change the time base. For speed, use the speed converter; the numeric factor happens to be the same, but mixing the two up in a multi-step calculation is a common slip.
Trusting the five-eighths shortcut for long distances

Multiplying by 5 and dividing by 8 gives 0.625 instead of 0.621371 — about half a percent high. Over 1,000 km that is 3.6 miles.

Sources for this page

Special Publication 811 — Guide for the Use of the International System of Units (SI) NIST (US National Institute of Standards and Technology) · Conversion factors between US customary and SI units, and the rounding and significant-figure conventions this site follows.
Saffir-Simpson Hurricane Wind Scale NOAA National Hurricane Center · A worked example of the same wind speed published simultaneously in mph, knots, and km/h.

Content on this page last reviewed 12 August 2026. Spotted an error? Report it — see also how these values are calculated.

Convert Mile to other length units

1 mi expressed in every other length unit on this site.

Meter m 1,609.344
Kilometer km 1.609344
Hectometer hm 16.09344
Dekameter dam 160.9344
Decimeter dm 16,093.44
Centimeter cm 160,934.4
Millimeter mm 1,609,344
Micrometer µm 1,609,344,000
Nanometer nm 1,609,344,000,000
Picometer pm 1.609344e+15
Femtometer fm 1.609344e+18
Attometer am 1.609344e+21
Megameter Mm 0.001609344
Gigameter Gm 0.000001609344
Terameter Tm 1.609344e-9
Petameter Pm 1.609344e-12
Exameter Em 1.609344e-15
Angstrom Å 16,093,440,000,000
Mile mi 1
Yard yd 1,760
Foot ft 5,280
Inch in 63,360
Kiloyard kyd 1.76
League lea 0.33333333
Furlong fur 8
Chain ch 80
Rod rd 320
Perch perch 320
Pole pole 320
Rope rope 264
Fathom fath 880
Link li 8,000
Hand hand 15,840
Ell ell 1,408
Barleycorn barleycorn 190,080
Mil mil 63,360,000
Microinch µin 63,360,000,000
Caliber cl 6,336,000
Centiinch cin 6,336,000
Nautical Mile nmi 0.86897624
Nautical Mile (UK) NM (UK) 0.86842105
Nautical League nl 0.28965875
Nautical League (UK) nl (UK) 0.28947368
Mile (US survey) mi (US) 0.999998
Furlong (US survey) fur (US) 7.999984
Chain (US survey) ch (US) 79.99984
Rod (US survey) rd (US) 319.99936
Fathom (US survey) fath (US) 879.99824
Foot (US survey) ft (US) 5,279.9894
Link (US survey) li (US) 7,999.984
Inch (US survey) in (US) 63,359.873
League (statute) st.league 0.33333267
Pica pica 380,160
Point pt 4,561,920
Twip twip 91,238,400
Light Year ly 1.701078e-13
Astronomical Unit AU 1.07578e-8
Parsec pc 5.2155287e-14
Kiloparsec kpc 5.2155287e-17
Megaparsec Mpc 5.2155287e-20
Earth's Equatorial Radius R⊕(eq) 0.00025232196
Earth's Polar Radius R⊕(pol) 0.00025317079
Earth's Distance from Sun d⊕☉ 1.0757647e-8
Sun's Radius R☉ 0.000002313273
Bohr Radius a₀ 30,412,194,000,000
Electron Radius (classical) rₑ 5.7110649e+17
Fermi F 1.609344e+18
X-unit X 1.6060035e+16
Planck Length ℓP 9.9572407e+37
Mile (Roman) mi (Rom) 1.0875386
Roman Actus actus 45.360825
Arpent arpent 27.5
Cubit (UK) cubit 3,520
Cubit (Greek) cubit (Gk) 3,477.4973
Long Cubit long cubit 3,017.1429
Reed reed 586.66667
Long Reed long reed 502.85714
Span (cloth) span 7,040
Finger (cloth) finger 14,080
Nail (cloth) nail 28,160
Handbreadth handbreadth 21,120
Fingerbreadth fingerbreadth 84,480
Aln aln 2,710.3473
Famn famn 903.4491
Ken ken 759.71223
Russian Archin archin 2,262.8571
Vara Castellana vara (cast) 1,927.0073
Vara Conuquera vara (con) 642.33577
Vara de Tarea vara (tarea) 642.33577
Ja (Korean foot) 자 5,310.8352
Chi 치 53,108.352
Pun 푼 531,083.52
Gan 간 885.1392
Jang 장 531.08352
Ri (Korean) 리 4.0978667

About the mile

The mile (mi) is a Imperial unit of length. The international mile, defined as exactly 1,760 yards.

About the kilometer

The kilometer (km) is a SI unit of length.

Related conversions

Frequently asked questions

How many kilometres is a marathon?

A marathon is 26.2188 miles, which is 42.195 km — the distance is defined in kilometres by World Athletics, and the mile figure is the conversion rather than the other way round.

Why is a mile 5,280 feet?

The Roman mile was a thousand paces, later reconciled with the English furlong: eight furlongs of 660 feet gives 5,280 feet. Since 1959 it has been defined through the yard, making it exactly 1,609.344 m.

What is 60 mph in km/h?

60 mph is 96.56 km/h — which is why 100 km/h and 60 mph are treated as roughly equivalent highway limits even though they differ by about 3.5%.

How many kilometers are in a mile?

One mile equals 1.609344 kilometers.

How do you convert miles to kilometers?