Example 1
42.195 km -> 26.2188 mi.
Km to miles
Type a distance in kilometers or in statute miles and pick the direction. The calculator divides by 1.609344. 5 km is 3.1069 mi. The nautical mile is not on this page.
Route length, no hour. Speed: km/h and mph. Shorter lengths: meters and feet.
Result
Enter a value. The result shows up here.
How it works
The statute mile has been exactly 1609.344 m since 1959, which is 1.609344 km. A 5 km parkrun is 3.1069 mi. 10 km is 6.2137 mi. The official 42.195 km marathon is 26.2188 mi. One kilometer is 0.6214 mi. One hundred kilometers on a cluster is 62.1371 mi.
A US watch shows miles, while a parkrun organizer writes 5 km. Type 5 and leave kilometers. A “26.2” sign is a rounding: 26.2 mi is 42.1648 km, not 42.195. Ten miles on a US map is 16.0934 km. One hundred thirty kilometers between towns is 80.7783 mi.
Pick the direction from the list: km to miles or miles to km. A comma and a period both work. Typed zero is allowed. A minus is rejected. Four decimals stay so a marathon does not collapse into a blunt “26 miles”. The header switch sets km or mi on an empty field and does not rewrite a typed five.
Speed lives on the km/h and mph page, same factor, but with an hour. Shorter lengths, a room or a height, sit on the meters-and-feet page. Here it stays route distance.
The nautical mile is 1852 m, a different length. European navigation counts kilometers; US navigation counts miles. The converter knows one number, not your route and not GPS.
Parkrun is measured as 5 km. In miles that is 3.1069 mi. The organizer lists kilometers; you can flip the watch after the conversion.
How to use
- Type a distance, for example 5 or 26.2 from a marathon.
- Pick km to miles or miles to km.
- Click Calculate. 5 km gives 3.1069 mi. 42.195 km gives 26.2188 mi.
- A statute mile is 1.609344 km. A nautical mile is not used here.
- For pace, open km/h and mph. There is no hour here.
Formula
mi = km / 1.609344
km = mi × 1.609344
1 statute mile = 1609.344 m. The nautical mile (1852 m) is not in this formula.
km and mi from the 1.609344 factor
1 mi = 1.609344 km. 5 km is 3.1069 mi. A 42.195 km marathon is 26.2188 mi. The 1852 m nautical mile is not used here.
- km
- Kilometre. 5 km parkrun, 42.195 km marathon, 100 km on the odometer. Not a nautical mile.
- mi
- Statute mile, 1609.344 m. 3.1069 from 5 km. A 26.2 mi sign is not official 42.195 km.
Real-life examples
Example 2
100 km -> 62.1371 mi on a car odometer.
Example 3
5 km parkrun -> 3.1069 mi.
Example 4
1 statute mi -> 1.6093 km.
Example 5
10 mi -> 16.0934 km on a US map.
Example 6
1 km -> 0.6214 statute mi.
Example 7
130 km -> 80.7783 mi between towns.
Example 8
26.2 mi on a sign -> 42.1648 km.
Ways to use this converter
- You convert a 5 km parkrun when a US watch shows mi.
- You check a 26.2 sign against the official 42.195 km marathon.
Frequently asked questions
Is this a statute mile or a nautical mile?
Statute, international: exactly 1609.344 m. A nautical mile is 1852 m and stays off this card. Another definition, another length.
Where does 1.609344 km per mile come from?
From the 1959 agreement that set the international mile at 1609.344 metres. That is a definition, not a GPS trace.
Is zero kilometers allowed?
Zero kilometers is zero miles. A typed zero is allowed. An empty field does not start a calculation.
Can I type a negative distance?
A negative length has no meaning here. Compute the gap between two stretches on its own and type the positive value. The calculator rejects a minus.
How many miles is 5 km, and how many km is 26.2 miles?
5 / 1.609344 is 3.1069 mi. 26.2 mi is 42.1648 km. An IAAF marathon is 42.195 km, which is 26.2188 mi.
How many decimals does the result have?
Four places, so 42.195 km does not collapse to a bare “26 miles”. You round for a sign yourself.
Do comma and period both work?
Yes. 10.5 and 10,5 are the same distance. A thousands separator with a space is better left out.
How is this different from miles per hour?
Here you convert route length. Miles per hour is speed, on the km/h and mph page. An hour does not appear here.
Is 5 km exactly a parkrun?
Parkrun is measured as 5 km. In miles that is 3.1069 mi. The organiser lists kilometres, not miles.
Why is 26.2 miles not exactly 42.195 km?
The official marathon is 42.195 km, which is 26.2188 mi. A 26.2 mi sign is 42.1648 km, a few dozen metres short.
Knowledge sources
The converter multiplies your number by an SI factor. NIST SP 330 and BIPM define the units, not your reading.
Page updated in 2026.